ºÝºÝߣshows by User: markel_vigo / http://www.slideshare.net/images/logo.gif ºÝºÝߣshows by User: markel_vigo / Tue, 24 Apr 2018 20:40:18 GMT ºÝºÝߣShare feed for ºÝºÝߣshows by User: markel_vigo Inferring visual behaviour from user interaction data on a medical dashboard /slideshow/inferring-visual-behaviour-from-user-interaction-data-on-a-medical-dashboard/94916481 inferringvisualbehaviourfromuserinteractiondataonamedicaldashboard-mv-180424204018
Paper presented at the 2018 International Conference on Digital Health. Available at https://doi.org/10.1145/3194658.3194676 ]]>
Paper presented at the 2018 International Conference on Digital Health. Available at https://doi.org/10.1145/3194658.3194676 ]]> Tue, 24 Apr 2018 20:40:18 GMT /slideshow/inferring-visual-behaviour-from-user-interaction-data-on-a-medical-dashboard/94916481 markel_vigo@slideshare.net(markel_vigo) Inferring visual behaviour from user interaction data on a medical dashboard markel_vigo Paper presented at the 2018 International Conference on Digital Health. Available at https://doi.org/10.1145/3194658.3194676 <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/inferringvisualbehaviourfromuserinteractiondataonamedicaldashboard-mv-180424204018-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Paper presented at the 2018 International Conference on Digital Health. Available at https://doi.org/10.1145/3194658.3194676
Inferring visual behaviour from user interaction data on a medical dashboard from Markel Vigo
]]> 242 6 https://cdn.slidesharecdn.com/ss_thumbnails/inferringvisualbehaviourfromuserinteractiondataonamedicaldashboard-mv-180424204018-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Constructing Conceptual Knowledge Artefacts: 
 Activity Patterns in the Ontology Authoring Process /slideshow/chi2015/47670703 gipaydavrua4jyjcvvsw-signature-1abf38494e12f26690441c45112d1a021c8150006454e8850931d34447637f28-poli-150502040143-conversion-gate01
We present the results of a study that identifies common activity patterns through analysis of eye-tracking data and the event logs of the popular authoring tool, Protégé. Informed by the activity patterns discovered, we propose design guidelines for bulk editing, efficient reasoning and increased situational awareness. Methodological implications go beyond the remit of knowledge artefacts.]]>
We present the results of a study that identifies common activity patterns through analysis of eye-tracking data and the event logs of the popular authoring tool, Protégé. Informed by the activity patterns discovered, we propose design guidelines for bulk editing, efficient reasoning and increased situational awareness. Methodological implications go beyond the remit of knowledge artefacts.]]> Sat, 02 May 2015 04:01:43 GMT /slideshow/chi2015/47670703 markel_vigo@slideshare.net(markel_vigo) Constructing Conceptual Knowledge Artefacts: 
 Activity Patterns in the Ontology Authoring Process markel_vigo We present the results of a study that identifies common activity patterns through analysis of eye-tracking data and the event logs of the popular authoring tool, Protégé. Informed by the activity patterns discovered, we propose design guidelines for bulk editing, efficient reasoning and increased situational awareness. Methodological implications go beyond the remit of knowledge artefacts. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/gipaydavrua4jyjcvvsw-signature-1abf38494e12f26690441c45112d1a021c8150006454e8850931d34447637f28-poli-150502040143-conversion-gate01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> We present the results of a study that identifies common activity patterns through analysis of eye-tracking data and the event logs of the popular authoring tool, Protégé. Informed by the activity patterns discovered, we propose design guidelines for bulk editing, efficient reasoning and increased situational awareness. Methodological implications go beyond the remit of knowledge artefacts.
Constructing Conceptual Knowledge Artefacts: Activity Patterns in the Ontology Authoring Process from Markel Vigo
]]> 1327 1 https://cdn.slidesharecdn.com/ss_thumbnails/gipaydavrua4jyjcvvsw-signature-1abf38494e12f26690441c45112d1a021c8150006454e8850931d34447637f28-poli-150502040143-conversion-gate01-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Protégé4US: Harvesting Ontology Authoring Data with Protégé /slideshow/hswi/35380763 hswi-140602060414-phpapp02
The inherent complexity of ontologies poses a number of cognitive and perceptual challenges for ontology authors. We investigate how users deal with the complexity of the authoring process by analysing how one of the most widespread ontology development tools (i.e. Protégé) is used. To do so, we build Protégé4US (Protégé for User Studies) by extending Protégé in order to generate log files that contain ontology authoring events. These log files not only contain data about the interaction with the environment, but also about OWL entities and axioms. We illustrate the usefulness of Protégé4US with a case study with 15 participants. The data generated from the study allows us to know more about how Protégé is used (e.g. most frequently used tabs), how well users perform (e.g. task completion times) and identify emergent authoring strategies, including moving down the class hierarchy or saving the cur- rent workspace before running the reasoner. We argue that Protégé4US is an valuable instrument to identify ontology authoring patterns.]]>
The inherent complexity of ontologies poses a number of cognitive and perceptual challenges for ontology authors. We investigate how users deal with the complexity of the authoring process by analysing how one of the most widespread ontology development tools (i.e. Protégé) is used. To do so, we build Protégé4US (Protégé for User Studies) by extending Protégé in order to generate log files that contain ontology authoring events. These log files not only contain data about the interaction with the environment, but also about OWL entities and axioms. We illustrate the usefulness of Protégé4US with a case study with 15 participants. The data generated from the study allows us to know more about how Protégé is used (e.g. most frequently used tabs), how well users perform (e.g. task completion times) and identify emergent authoring strategies, including moving down the class hierarchy or saving the cur- rent workspace before running the reasoner. We argue that Protégé4US is an valuable instrument to identify ontology authoring patterns.]]> Mon, 02 Jun 2014 06:04:14 GMT /slideshow/hswi/35380763 markel_vigo@slideshare.net(markel_vigo) Protégé4US: Harvesting Ontology Authoring Data with Protégé markel_vigo The inherent complexity of ontologies poses a number of cognitive and perceptual challenges for ontology authors. We investigate how users deal with the complexity of the authoring process by analysing how one of the most widespread ontology development tools (i.e. Protégé) is used. To do so, we build Protégé4US (Protégé for User Studies) by extending Protégé in order to generate log files that contain ontology authoring events. These log files not only contain data about the interaction with the environment, but also about OWL entities and axioms. We illustrate the usefulness of Protégé4US with a case study with 15 participants. The data generated from the study allows us to know more about how Protégé is used (e.g. most frequently used tabs), how well users perform (e.g. task completion times) and identify emergent authoring strategies, including moving down the class hierarchy or saving the cur- rent workspace before running the reasoner. We argue that Protégé4US is an valuable instrument to identify ontology authoring patterns. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/hswi-140602060414-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> The inherent complexity of ontologies poses a number of cognitive and perceptual challenges for ontology authors. We investigate how users deal with the complexity of the authoring process by analysing how one of the most widespread ontology development tools (i.e. Protégé) is used. To do so, we build Protégé4US (Protégé for User Studies) by extending Protégé in order to generate log files that contain ontology authoring events. These log files not only contain data about the interaction with the environment, but also about OWL entities and axioms. We illustrate the usefulness of Protégé4US with a case study with 15 participants. The data generated from the study allows us to know more about how Protégé is used (e.g. most frequently used tabs), how well users perform (e.g. task completion times) and identify emergent authoring strategies, including moving down the class hierarchy or saving the cur- rent workspace before running the reasoner. We argue that Protégé4US is an valuable instrument to identify ontology authoring patterns.
Prot辿g辿4US: Harvesting Ontology Authoring Data with Prot辿g辿 from Markel Vigo
]]> 1355 4 https://cdn.slidesharecdn.com/ss_thumbnails/hswi-140602060414-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Design Insights for the Next Wave Ontology Authoring Tools /slideshow/design-insights-for-the-next-wave-ontology-authoring-tools/34094567 designinsigthschi14presentation-140429141924-phpapp02
We provide a systematic attempt to understand what users really require to build successful ontologies. To do so, we present the insights from an interview study with 15 ontology authors in which we identify the problems reported by authors, and the strategies they employ to solve them. We map the data to a set of design recommendations, which describe how tools can support ontology authoring going forward.]]>
We provide a systematic attempt to understand what users really require to build successful ontologies. To do so, we present the insights from an interview study with 15 ontology authors in which we identify the problems reported by authors, and the strategies they employ to solve them. We map the data to a set of design recommendations, which describe how tools can support ontology authoring going forward.]]> Tue, 29 Apr 2014 14:19:23 GMT /slideshow/design-insights-for-the-next-wave-ontology-authoring-tools/34094567 markel_vigo@slideshare.net(markel_vigo) Design Insights for the Next Wave Ontology Authoring Tools markel_vigo We provide a systematic attempt to understand what users really require to build successful ontologies. To do so, we present the insights from an interview study with 15 ontology authors in which we identify the problems reported by authors, and the strategies they employ to solve them. We map the data to a set of design recommendations, which describe how tools can support ontology authoring going forward. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/designinsigthschi14presentation-140429141924-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> We provide a systematic attempt to understand what users really require to build successful ontologies. To do so, we present the insights from an interview study with 15 ontology authors in which we identify the problems reported by authors, and the strategies they employ to solve them. We map the data to a set of design recommendations, which describe how tools can support ontology authoring going forward.
Design Insights for the Next Wave Ontology Authoring Tools from Markel Vigo
]]> 1334 2 https://cdn.slidesharecdn.com/ss_thumbnails/designinsigthschi14presentation-140429141924-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation 000000 http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Identifying ontology authoring strategies and patterns /markel_vigo/identifying-ontology-authoring-strategies-and-patterns ukonpresentation-140424045944-phpapp02
ºÝºÝߣs presenting our recent work at the 2014 UK ontology meeting: design recommendations for the next generation of ontology authoring tools, Protégé4US (Protégé for user studies) and some incipient authoring patterns we found.]]>
ºÝºÝߣs presenting our recent work at the 2014 UK ontology meeting: design recommendations for the next generation of ontology authoring tools, Protégé4US (Protégé for user studies) and some incipient authoring patterns we found.]]> Thu, 24 Apr 2014 04:59:44 GMT /markel_vigo/identifying-ontology-authoring-strategies-and-patterns markel_vigo@slideshare.net(markel_vigo) Identifying ontology authoring strategies and patterns markel_vigo ºÝºÝߣs presenting our recent work at the 2014 UK ontology meeting: design recommendations for the next generation of ontology authoring tools, Protégé4US (Protégé for user studies) and some incipient authoring patterns we found. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/ukonpresentation-140424045944-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> ºÝºÝߣs presenting our recent work at the 2014 UK ontology meeting: design recommendations for the next generation of ontology authoring tools, Protégé4US (Protégé for user studies) and some incipient authoring patterns we found.
Identifying ontology authoring strategies and patterns from Markel Vigo
]]> 1153 4 https://cdn.slidesharecdn.com/ss_thumbnails/ukonpresentation-140424045944-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation White http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Detecting Problematic Interactions on the Web. The COPE Project: Coping strategies on the Web /slideshow/detecting-problematic-interactions-on-the-web-the-cope-project-coping-strategies-on-the-web/28401051 ehuazaroak18-131119011241-phpapp02
These slides depict the work carried out on the COPE project from 2011 to 2013. We propose a method to identify problems and coping tactics in populations that are constrained. Then we generalise the problems encountered and the strategies employed to broader audiences. We conclude that there is an overlap between the problems and strategies of blind and sighted users. This provides more support to the hypothesis of the accessibility continuum. ]]>
These slides depict the work carried out on the COPE project from 2011 to 2013. We propose a method to identify problems and coping tactics in populations that are constrained. Then we generalise the problems encountered and the strategies employed to broader audiences. We conclude that there is an overlap between the problems and strategies of blind and sighted users. This provides more support to the hypothesis of the accessibility continuum. ]]> Tue, 19 Nov 2013 01:12:41 GMT /slideshow/detecting-problematic-interactions-on-the-web-the-cope-project-coping-strategies-on-the-web/28401051 markel_vigo@slideshare.net(markel_vigo) Detecting Problematic Interactions on the Web. The COPE Project: Coping strategies on the Web markel_vigo These slides depict the work carried out on the COPE project from 2011 to 2013. We propose a method to identify problems and coping tactics in populations that are constrained. Then we generalise the problems encountered and the strategies employed to broader audiences. We conclude that there is an overlap between the problems and strategies of blind and sighted users. This provides more support to the hypothesis of the accessibility continuum. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/ehuazaroak18-131119011241-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> These slides depict the work carried out on the COPE project from 2011 to 2013. We propose a method to identify problems and coping tactics in populations that are constrained. Then we generalise the problems encountered and the strategies employed to broader audiences. We conclude that there is an overlap between the problems and strategies of blind and sighted users. This provides more support to the hypothesis of the accessibility continuum.
Detecting Problematic Interactions on the Web. The COPE Project: Coping strategies on the Web from Markel Vigo
]]> 1012 3 https://cdn.slidesharecdn.com/ss_thumbnails/ehuazaroak18-131119011241-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Challenging Information Foraging Theory: Screen Reader Users are not Always Driven by Information Scent /slideshow/ht-presentation-21273402/21273402 htpresentation-130516122008-phpapp02
Little is known about the navigation tactics employed by screen reader users when they face problematic situations on the Web. Understanding how these tactics are operationalised and knowing the situations that bring about such tactics paves the way towards modeling navigation behaviour. Modeling the navigation of users is of utmost importance as it allows not only to predict interactive behaviour, but also to assess the appropriateness of the content in a link, the information architecture of a site and the design of a web page. Current navigation models do not consider the extreme adaptations, namely coping tactics, that screen reader users undergo on the Web. Consequently, their prediction power is lessened and coping tactics are mistakenly considered outlying behaviours. We draw from existing navigation models for sighted users to suggest the incorporation of emerging behaviours in navigation models for screen reader users. To do so, we identify the navigation coping tactics screen reader users exhibit on the Web, including deliberately clicking on low scented links, escaping from useless or inaccessible content and backtracking to a shelter. Our findings suggest that, especially in problematic situations, navigation is not driven by information scent or utility, but by the need of increasing autonomy and the need of escaping from the current web patch.]]>
Little is known about the navigation tactics employed by screen reader users when they face problematic situations on the Web. Understanding how these tactics are operationalised and knowing the situations that bring about such tactics paves the way towards modeling navigation behaviour. Modeling the navigation of users is of utmost importance as it allows not only to predict interactive behaviour, but also to assess the appropriateness of the content in a link, the information architecture of a site and the design of a web page. Current navigation models do not consider the extreme adaptations, namely coping tactics, that screen reader users undergo on the Web. Consequently, their prediction power is lessened and coping tactics are mistakenly considered outlying behaviours. We draw from existing navigation models for sighted users to suggest the incorporation of emerging behaviours in navigation models for screen reader users. To do so, we identify the navigation coping tactics screen reader users exhibit on the Web, including deliberately clicking on low scented links, escaping from useless or inaccessible content and backtracking to a shelter. Our findings suggest that, especially in problematic situations, navigation is not driven by information scent or utility, but by the need of increasing autonomy and the need of escaping from the current web patch.]]> Thu, 16 May 2013 12:20:08 GMT /slideshow/ht-presentation-21273402/21273402 markel_vigo@slideshare.net(markel_vigo) Challenging Information Foraging Theory: Screen Reader Users are not Always Driven by Information Scent markel_vigo Little is known about the navigation tactics employed by screen reader users when they face problematic situations on the Web. Understanding how these tactics are operationalised and knowing the situations that bring about such tactics paves the way towards modeling navigation behaviour. Modeling the navigation of users is of utmost importance as it allows not only to predict interactive behaviour, but also to assess the appropriateness of the content in a link, the information architecture of a site and the design of a web page. Current navigation models do not consider the extreme adaptations, namely coping tactics, that screen reader users undergo on the Web. Consequently, their prediction power is lessened and coping tactics are mistakenly considered outlying behaviours. We draw from existing navigation models for sighted users to suggest the incorporation of emerging behaviours in navigation models for screen reader users. To do so, we identify the navigation coping tactics screen reader users exhibit on the Web, including deliberately clicking on low scented links, escaping from useless or inaccessible content and backtracking to a shelter. Our findings suggest that, especially in problematic situations, navigation is not driven by information scent or utility, but by the need of increasing autonomy and the need of escaping from the current web patch. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/htpresentation-130516122008-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Little is known about the navigation tactics employed by screen reader users when they face problematic situations on the Web. Understanding how these tactics are operationalised and knowing the situations that bring about such tactics paves the way towards modeling navigation behaviour. Modeling the navigation of users is of utmost importance as it allows not only to predict interactive behaviour, but also to assess the appropriateness of the content in a link, the information architecture of a site and the design of a web page. Current navigation models do not consider the extreme adaptations, namely coping tactics, that screen reader users undergo on the Web. Consequently, their prediction power is lessened and coping tactics are mistakenly considered outlying behaviours. We draw from existing navigation models for sighted users to suggest the incorporation of emerging behaviours in navigation models for screen reader users. To do so, we identify the navigation coping tactics screen reader users exhibit on the Web, including deliberately clicking on low scented links, escaping from useless or inaccessible content and backtracking to a shelter. Our findings suggest that, especially in problematic situations, navigation is not driven by information scent or utility, but by the need of increasing autonomy and the need of escaping from the current web patch.
Challenging Information Foraging Theory: Screen Reader Users are not Always Driven by Information Scent from Markel Vigo
]]> 1101 3 https://cdn.slidesharecdn.com/ss_thumbnails/htpresentation-130516122008-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation White http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Considering People with Disabilities as Ãœberusers for Eliciting Generalisable Coping Strategies on the Web /slideshow/considering-people-with-disabilities-as-uberusers/21272752 consideringpeoplewithdisabilitiesasuberusers-130516121316-phpapp01
When users struggle on the Web they employ extreme adaptations to tackle problematic situations, namely coping strategies. If we are able to automatically detect such situations we can provide the means to bypass or pre-empt them. However, isolating these coping strategies is a challenging task: coping occurs seldom and when it happens, coping is not always overtly manifested. Therefore, in order to identify the coping strategies employed by users in situ longitudinal observations have to be conducted, which are resource intensive. We propose a more economical method that transfers the coping strategies employed by groups of users that cope frequently and overtly, such as people with disabilities, to broader populations. To do so, we first identify the coping strategies employed by people with disabilities; then we code these strategies and convert them into coping detection algorithms that are injected into web pages. Remote longitudinal studies are run with broader populations to measure the detection rate of the algorithms. Based on participants’ feedback we iteratively modify the algorithms to adjust them to the coping strategies users employ. We illustrate this method with a case study that transfers the strategies employed by visually disabled users to able-bodied users. We discover that different populations do not only face the same problems, but also exhibit similar strategies to tackle them.]]>
When users struggle on the Web they employ extreme adaptations to tackle problematic situations, namely coping strategies. If we are able to automatically detect such situations we can provide the means to bypass or pre-empt them. However, isolating these coping strategies is a challenging task: coping occurs seldom and when it happens, coping is not always overtly manifested. Therefore, in order to identify the coping strategies employed by users in situ longitudinal observations have to be conducted, which are resource intensive. We propose a more economical method that transfers the coping strategies employed by groups of users that cope frequently and overtly, such as people with disabilities, to broader populations. To do so, we first identify the coping strategies employed by people with disabilities; then we code these strategies and convert them into coping detection algorithms that are injected into web pages. Remote longitudinal studies are run with broader populations to measure the detection rate of the algorithms. Based on participants’ feedback we iteratively modify the algorithms to adjust them to the coping strategies users employ. We illustrate this method with a case study that transfers the strategies employed by visually disabled users to able-bodied users. We discover that different populations do not only face the same problems, but also exhibit similar strategies to tackle them.]]> Thu, 16 May 2013 12:13:16 GMT /slideshow/considering-people-with-disabilities-as-uberusers/21272752 markel_vigo@slideshare.net(markel_vigo) Considering People with Disabilities as Überusers for Eliciting Generalisable Coping Strategies on the Web markel_vigo When users struggle on the Web they employ extreme adaptations to tackle problematic situations, namely coping strategies. If we are able to automatically detect such situations we can provide the means to bypass or pre-empt them. However, isolating these coping strategies is a challenging task: coping occurs seldom and when it happens, coping is not always overtly manifested. Therefore, in order to identify the coping strategies employed by users in situ longitudinal observations have to be conducted, which are resource intensive. We propose a more economical method that transfers the coping strategies employed by groups of users that cope frequently and overtly, such as people with disabilities, to broader populations. To do so, we first identify the coping strategies employed by people with disabilities; then we code these strategies and convert them into coping detection algorithms that are injected into web pages. Remote longitudinal studies are run with broader populations to measure the detection rate of the algorithms. Based on participants’ feedback we iteratively modify the algorithms to adjust them to the coping strategies users employ. We illustrate this method with a case study that transfers the strategies employed by visually disabled users to able-bodied users. We discover that different populations do not only face the same problems, but also exhibit similar strategies to tackle them. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/consideringpeoplewithdisabilitiesasuberusers-130516121316-phpapp01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> When users struggle on the Web they employ extreme adaptations to tackle problematic situations, namely coping strategies. If we are able to automatically detect such situations we can provide the means to bypass or pre-empt them. However, isolating these coping strategies is a challenging task: coping occurs seldom and when it happens, coping is not always overtly manifested. Therefore, in order to identify the coping strategies employed by users in situ longitudinal observations have to be conducted, which are resource intensive. We propose a more economical method that transfers the coping strategies employed by groups of users that cope frequently and overtly, such as people with disabilities, to broader populations. To do so, we first identify the coping strategies employed by people with disabilities; then we code these strategies and convert them into coping detection algorithms that are injected into web pages. Remote longitudinal studies are run with broader populations to measure the detection rate of the algorithms. Based on participants’ feedback we iteratively modify the algorithms to adjust them to the coping strategies users employ. We illustrate this method with a case study that transfers the strategies employed by visually disabled users to able-bodied users. We discover that different populations do not only face the same problems, but also exhibit similar strategies to tackle them.
Considering People with Disabilities as テ彙erusers for Eliciting Generalisable Coping Strategies on the Web from Markel Vigo
]]> 716 2 https://cdn.slidesharecdn.com/ss_thumbnails/consideringpeoplewithdisabilitiesasuberusers-130516121316-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds presentation White http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Evaluating Accessibility-in-Use /slideshow/evaluating-accessibilityinuse/21093096 evaluatingaccessibilityinusew4a-130513052849-phpapp02
Evidence suggests that guidelines employed in conformance testing do not catch all the accessibility barriers encountered by users on the Web. Since accessibility is strongly tied to the users’ experience there is a subjective perception of accessibility barriers and their severity. What is more, not only intangible qualities characterise the way in which these barriers are perceived, but also navigation styles, age, onset, expertise and abilities play a key role. In order to overcome the limitations of conformance testing and catch the problems that emerge during the interaction we propose a user-interaction-driven method to automatically report accessibility problems. To do so, we initially isolate the problematic situations faced by users and the tactics employed in such situations. These tactics are considered behavioural markers of cognitive processes that indicate problematic situations; the presence of tactics denotes the presence of problems. Then, we design and deploy algorithms to automatically detect the exhibition of these tactics and consequently detect problematic situations. WebTactics, a tool that unobtrusively detects and reports the problematic situations undergone by visually disabled users illustrates the method we propose.]]>
Evidence suggests that guidelines employed in conformance testing do not catch all the accessibility barriers encountered by users on the Web. Since accessibility is strongly tied to the users’ experience there is a subjective perception of accessibility barriers and their severity. What is more, not only intangible qualities characterise the way in which these barriers are perceived, but also navigation styles, age, onset, expertise and abilities play a key role. In order to overcome the limitations of conformance testing and catch the problems that emerge during the interaction we propose a user-interaction-driven method to automatically report accessibility problems. To do so, we initially isolate the problematic situations faced by users and the tactics employed in such situations. These tactics are considered behavioural markers of cognitive processes that indicate problematic situations; the presence of tactics denotes the presence of problems. Then, we design and deploy algorithms to automatically detect the exhibition of these tactics and consequently detect problematic situations. WebTactics, a tool that unobtrusively detects and reports the problematic situations undergone by visually disabled users illustrates the method we propose.]]> Mon, 13 May 2013 05:28:49 GMT /slideshow/evaluating-accessibilityinuse/21093096 markel_vigo@slideshare.net(markel_vigo) Evaluating Accessibility-in-Use markel_vigo Evidence suggests that guidelines employed in conformance testing do not catch all the accessibility barriers encountered by users on the Web. Since accessibility is strongly tied to the users’ experience there is a subjective perception of accessibility barriers and their severity. What is more, not only intangible qualities characterise the way in which these barriers are perceived, but also navigation styles, age, onset, expertise and abilities play a key role. In order to overcome the limitations of conformance testing and catch the problems that emerge during the interaction we propose a user-interaction-driven method to automatically report accessibility problems. To do so, we initially isolate the problematic situations faced by users and the tactics employed in such situations. These tactics are considered behavioural markers of cognitive processes that indicate problematic situations; the presence of tactics denotes the presence of problems. Then, we design and deploy algorithms to automatically detect the exhibition of these tactics and consequently detect problematic situations. WebTactics, a tool that unobtrusively detects and reports the problematic situations undergone by visually disabled users illustrates the method we propose. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/evaluatingaccessibilityinusew4a-130513052849-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Evidence suggests that guidelines employed in conformance testing do not catch all the accessibility barriers encountered by users on the Web. Since accessibility is strongly tied to the users’ experience there is a subjective perception of accessibility barriers and their severity. What is more, not only intangible qualities characterise the way in which these barriers are perceived, but also navigation styles, age, onset, expertise and abilities play a key role. In order to overcome the limitations of conformance testing and catch the problems that emerge during the interaction we propose a user-interaction-driven method to automatically report accessibility problems. To do so, we initially isolate the problematic situations faced by users and the tactics employed in such situations. These tactics are considered behavioural markers of cognitive processes that indicate problematic situations; the presence of tactics denotes the presence of problems. Then, we design and deploy algorithms to automatically detect the exhibition of these tactics and consequently detect problematic situations. WebTactics, a tool that unobtrusively detects and reports the problematic situations undergone by visually disabled users illustrates the method we propose.
Evaluating Accessibility-in-Use from Markel Vigo
]]> 3996 5 https://cdn.slidesharecdn.com/ss_thumbnails/evaluatingaccessibilityinusew4a-130513052849-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation White http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Benchmarking Web Accessibility Evaluation Tools: Measuring the Harm of Sole Reliance on Automated Tests /markel_vigo/benchmarking-web-accessibility-evaluation-tools-measuring-the-harm-of-sole-reliance-on-automated-tests benchmarkingw4a-130513052307-phpapp01
The use of web accessibility evaluation tools is a widespread practice. Evaluation tools are heavily employed as they help in reducing the burden of identifying accessibility barriers. However, an overreliance on automated tests often leads to setting aside further testing that entails expert evaluation and user tests. In this paper we empirically show the capabilities of current automated evaluation tools. To do so, we investigate the effectiveness of 6 state-of-the-art tools by analysing their coverage, completeness and correctness with regard to WCAG 2.0 conformance. We corroborate that relying on automated tests alone has negative effects and can have undesirable consequences. Coverage is very narrow as, at most, 50% of the success criteria are covered. Similarly, completeness ranges between 14% and 38%; however, some of the tools that exhibit higher completeness scores produce lower correctness scores (66-71%) due to the fact that catching as many violations as possible can lead to an increase in false positives. Therefore, relying on just automated tests entails that 1 of 2 success criteria will not even be analysed and among those analysed, only 4 out of 10 will be caught at the further risk of generating false positives.]]>
The use of web accessibility evaluation tools is a widespread practice. Evaluation tools are heavily employed as they help in reducing the burden of identifying accessibility barriers. However, an overreliance on automated tests often leads to setting aside further testing that entails expert evaluation and user tests. In this paper we empirically show the capabilities of current automated evaluation tools. To do so, we investigate the effectiveness of 6 state-of-the-art tools by analysing their coverage, completeness and correctness with regard to WCAG 2.0 conformance. We corroborate that relying on automated tests alone has negative effects and can have undesirable consequences. Coverage is very narrow as, at most, 50% of the success criteria are covered. Similarly, completeness ranges between 14% and 38%; however, some of the tools that exhibit higher completeness scores produce lower correctness scores (66-71%) due to the fact that catching as many violations as possible can lead to an increase in false positives. Therefore, relying on just automated tests entails that 1 of 2 success criteria will not even be analysed and among those analysed, only 4 out of 10 will be caught at the further risk of generating false positives.]]> Mon, 13 May 2013 05:23:06 GMT /markel_vigo/benchmarking-web-accessibility-evaluation-tools-measuring-the-harm-of-sole-reliance-on-automated-tests markel_vigo@slideshare.net(markel_vigo) Benchmarking Web Accessibility Evaluation Tools: Measuring the Harm of Sole Reliance on Automated Tests markel_vigo The use of web accessibility evaluation tools is a widespread practice. Evaluation tools are heavily employed as they help in reducing the burden of identifying accessibility barriers. However, an overreliance on automated tests often leads to setting aside further testing that entails expert evaluation and user tests. In this paper we empirically show the capabilities of current automated evaluation tools. To do so, we investigate the effectiveness of 6 state-of-the-art tools by analysing their coverage, completeness and correctness with regard to WCAG 2.0 conformance. We corroborate that relying on automated tests alone has negative effects and can have undesirable consequences. Coverage is very narrow as, at most, 50% of the success criteria are covered. Similarly, completeness ranges between 14% and 38%; however, some of the tools that exhibit higher completeness scores produce lower correctness scores (66-71%) due to the fact that catching as many violations as possible can lead to an increase in false positives. Therefore, relying on just automated tests entails that 1 of 2 success criteria will not even be analysed and among those analysed, only 4 out of 10 will be caught at the further risk of generating false positives. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/benchmarkingw4a-130513052307-phpapp01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> The use of web accessibility evaluation tools is a widespread practice. Evaluation tools are heavily employed as they help in reducing the burden of identifying accessibility barriers. However, an overreliance on automated tests often leads to setting aside further testing that entails expert evaluation and user tests. In this paper we empirically show the capabilities of current automated evaluation tools. To do so, we investigate the effectiveness of 6 state-of-the-art tools by analysing their coverage, completeness and correctness with regard to WCAG 2.0 conformance. We corroborate that relying on automated tests alone has negative effects and can have undesirable consequences. Coverage is very narrow as, at most, 50% of the success criteria are covered. Similarly, completeness ranges between 14% and 38%; however, some of the tools that exhibit higher completeness scores produce lower correctness scores (66-71%) due to the fact that catching as many violations as possible can lead to an increase in false positives. Therefore, relying on just automated tests entails that 1 of 2 success criteria will not even be analysed and among those analysed, only 4 out of 10 will be caught at the further risk of generating false positives.
Benchmarking Web Accessibility Evaluation Tools: Measuring the Harm of Sole Reliance on Automated Tests from Markel Vigo
]]> 4171 6 https://cdn.slidesharecdn.com/ss_thumbnails/benchmarkingw4a-130513052307-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds presentation White http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Adaptive web accessibility metrics /slideshow/adaptive-web-accessibility-metrics-12631902/12631902 adaptivewebaccessibilitymetrics-120421112828-phpapp01
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]]> Sat, 21 Apr 2012 11:28:27 GMT /slideshow/adaptive-web-accessibility-metrics-12631902/12631902 markel_vigo@slideshare.net(markel_vigo) Adaptive web accessibility metrics markel_vigo <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/adaptivewebaccessibilitymetrics-120421112828-phpapp01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br>
Adaptive web accessibility metrics from Markel Vigo
]]> 767 4 https://cdn.slidesharecdn.com/ss_thumbnails/adaptivewebaccessibilitymetrics-120421112828-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Acceptance of Mobile Technology in Hedonic Scenarios /slideshow/acceptance-of-mobile-technology-in-hedonic-scenarios/12631845 bcshci-120421111909-phpapp02
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]]> Sat, 21 Apr 2012 11:19:06 GMT /slideshow/acceptance-of-mobile-technology-in-hedonic-scenarios/12631845 markel_vigo@slideshare.net(markel_vigo) Acceptance of Mobile Technology in Hedonic Scenarios markel_vigo <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/bcshci-120421111909-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br>
Acceptance of Mobile Technology in Hedonic Scenarios from Markel Vigo
]]> 1333 4 https://cdn.slidesharecdn.com/ss_thumbnails/bcshci-120421111909-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Enriching Web Information Scent for Blind Users /slideshow/enriching-web-information-scent-for-blind-users/2589286 assetspresentation-091126055355-phpapp01
Link annotation with the accessibility level of the target Web page is an adaptive navigation support technique aimed at increasing blind users’ orientation in Web sites. In this work, the accessibility level of a page is measured by exploiting data from evaluation reports produced by two automatic assessment tools. These tools support evaluation of accessibility and usability guideline-sets. As a result, links are annotated with a score that indicates the conformance of the target Web page to blind user accessibility and usability guidelines. A user test with 16 users was conducted in order to observe the strategies they followed when links were annotated with these scores. With annotated links, the navigation paradigm changed from sequential to browsing randomly through the subset of those links with high scores. Even if there was not a general agreement on the correspondence between scores and user perception of accessibility, users found annotations helpful when browsing through links related to a given topic.]]>
Link annotation with the accessibility level of the target Web page is an adaptive navigation support technique aimed at increasing blind users’ orientation in Web sites. In this work, the accessibility level of a page is measured by exploiting data from evaluation reports produced by two automatic assessment tools. These tools support evaluation of accessibility and usability guideline-sets. As a result, links are annotated with a score that indicates the conformance of the target Web page to blind user accessibility and usability guidelines. A user test with 16 users was conducted in order to observe the strategies they followed when links were annotated with these scores. With annotated links, the navigation paradigm changed from sequential to browsing randomly through the subset of those links with high scores. Even if there was not a general agreement on the correspondence between scores and user perception of accessibility, users found annotations helpful when browsing through links related to a given topic.]]> Thu, 26 Nov 2009 05:53:38 GMT /slideshow/enriching-web-information-scent-for-blind-users/2589286 markel_vigo@slideshare.net(markel_vigo) Enriching Web Information Scent for Blind Users markel_vigo Link annotation with the accessibility level of the target Web page is an adaptive navigation support technique aimed at increasing blind users’ orientation in Web sites. In this work, the accessibility level of a page is measured by exploiting data from evaluation reports produced by two automatic assessment tools. These tools support evaluation of accessibility and usability guideline-sets. As a result, links are annotated with a score that indicates the conformance of the target Web page to blind user accessibility and usability guidelines. A user test with 16 users was conducted in order to observe the strategies they followed when links were annotated with these scores. With annotated links, the navigation paradigm changed from sequential to browsing randomly through the subset of those links with high scores. Even if there was not a general agreement on the correspondence between scores and user perception of accessibility, users found annotations helpful when browsing through links related to a given topic. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/assetspresentation-091126055355-phpapp01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Link annotation with the accessibility level of the target Web page is an adaptive navigation support technique aimed at increasing blind users’ orientation in Web sites. In this work, the accessibility level of a page is measured by exploiting data from evaluation reports produced by two automatic assessment tools. These tools support evaluation of accessibility and usability guideline-sets. As a result, links are annotated with a score that indicates the conformance of the target Web page to blind user accessibility and usability guidelines. A user test with 16 users was conducted in order to observe the strategies they followed when links were annotated with these scores. With annotated links, the navigation paradigm changed from sequential to browsing randomly through the subset of those links with high scores. Even if there was not a general agreement on the correspondence between scores and user perception of accessibility, users found annotations helpful when browsing through links related to a given topic.
Enriching Web Information Scent for Blind Users from Markel Vigo
]]> 822 6 https://cdn.slidesharecdn.com/ss_thumbnails/assetspresentation-091126055355-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Transition of Accessibility Evaluation Tools to New Standards /slideshow/transition-of-accessibility-evaluation-tools-to-new-standards/1315905 w4a09-090420090756-phpapp02
Interactive online tool for accessibility guidelines creation, share, update and evaluation.]]>
Interactive online tool for accessibility guidelines creation, share, update and evaluation.]]> Mon, 20 Apr 2009 09:07:49 GMT /slideshow/transition-of-accessibility-evaluation-tools-to-new-standards/1315905 markel_vigo@slideshare.net(markel_vigo) Transition of Accessibility Evaluation Tools to New Standards markel_vigo Interactive online tool for accessibility guidelines creation, share, update and evaluation. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/w4a09-090420090756-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Interactive online tool for accessibility guidelines creation, share, update and evaluation.
Transition of Accessibility Evaluation Tools to New Standards from Markel Vigo
]]> 808 3 https://cdn.slidesharecdn.com/ss_thumbnails/w4a09-090420090756-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Automatic Creation of User Profiles for Achieving Personal Web Accessibility /slideshow/icchp2008/513947 icchp2008-1216135561030253-8
Paper presented at the ICCHP 2008 conference in Linz (Austria). It describes a component that collects information regarding the interaction context of the user such as assistive techonologies features and access devices characteristics in order to create a user profile.]]>
Paper presented at the ICCHP 2008 conference in Linz (Austria). It describes a component that collects information regarding the interaction context of the user such as assistive techonologies features and access devices characteristics in order to create a user profile.]]> Tue, 15 Jul 2008 08:33:28 GMT /slideshow/icchp2008/513947 markel_vigo@slideshare.net(markel_vigo) Automatic Creation of User Profiles for Achieving Personal Web Accessibility markel_vigo Paper presented at the ICCHP 2008 conference in Linz (Austria). It describes a component that collects information regarding the interaction context of the user such as assistive techonologies features and access devices characteristics in order to create a user profile. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/icchp2008-1216135561030253-8-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> Paper presented at the ICCHP 2008 conference in Linz (Austria). It describes a component that collects information regarding the interaction context of the user such as assistive techonologies features and access devices characteristics in order to create a user profile.
Automatic Creation of User Profiles for Achieving Personal Web Accessibility from Markel Vigo
]]> 881 3 https://cdn.slidesharecdn.com/ss_thumbnails/icchp2008-1216135561030253-8-thumbnail.jpg?width=120&height=120&fit=bounds presentation White http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 Evaluating Web Accessibility For Specific Mobile Devices /slideshow/evaluating-web-accessibility-for-specific-mobile-devices/366270 evaluating-web-accessibility-for-specific-mobile-devices-1208847885485122-8
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]]> Tue, 22 Apr 2008 00:05:02 GMT /slideshow/evaluating-web-accessibility-for-specific-mobile-devices/366270 markel_vigo@slideshare.net(markel_vigo) Evaluating Web Accessibility For Specific Mobile Devices markel_vigo <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/evaluating-web-accessibility-for-specific-mobile-devices-1208847885485122-8-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br>
Evaluating Web Accessibility For Specific Mobile Devices from Markel Vigo
]]> 1522 8 https://cdn.slidesharecdn.com/ss_thumbnails/evaluating-web-accessibility-for-specific-mobile-devices-1208847885485122-8-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 https://cdn.slidesharecdn.com/profile-photo-markel_vigo-48x48.jpg?cb=1634310529 http://www.markelvigo.info https://cdn.slidesharecdn.com/ss_thumbnails/inferringvisualbehaviourfromuserinteractiondataonamedicaldashboard-mv-180424204018-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/inferring-visual-behaviour-from-user-interaction-data-on-a-medical-dashboard/94916481 Inferring visual behav... https://cdn.slidesharecdn.com/ss_thumbnails/gipaydavrua4jyjcvvsw-signature-1abf38494e12f26690441c45112d1a021c8150006454e8850931d34447637f28-poli-150502040143-conversion-gate01-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/chi2015/47670703 Constructing Conceptua... https://cdn.slidesharecdn.com/ss_thumbnails/hswi-140602060414-phpapp02-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/hswi/35380763 Protégé4US: Harvesting...