Reliability of data set
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The document discusses the reliability of data sets. It defines reliability as ensuring consistent measurement free of bias and error. There are four main types of reliability: test-retest, parallel-form, inter-rater, and split-half. Test-retest reliability compares results over time. Parallel-form reliability correlates responses on comparable question forms. Inter-rater reliability compares ratings across different raters. Split-half reliability correlates scores on halves of a test. The document also outlines steps to calculate reliability in SPSS.
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🔔 Like, Share & Follow for more in-depth pharma insights!Dr. Ansari Khurshid Ahmed- Factors affecting Validity of a Test.pptx
Dr. Ansari Khurshid Ahmed- Factors affecting Validity of a Test.pptxKhurshid Ahmed Ansari
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Validity is an important characteristic of a test. A test having low validity is of little use. Validity is the accuracy with which a test measures whatever it is supposed to measure. Validity can be low, moderate or high. There are many factors which affect the validity of a test. If these factors are controlled, then the validity of the test can be maintained to a high level. In the power point presentation, factors affecting validity are discussed with the help of concrete examples.Azure Administrator Interview Questions By ScholarHat
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Reliability of data set
- 1. RELIABILITY OF DATA SET Presenter: Lokendar Singh MBA(AB) 1st YEAR IABM,BIKANER 4/6/2019 IABM,BIKANER 1
- 2. Flow of presentation • Definition of reliability • Types of reliability • Test-retest reliability • Parallel-form reliability • Inter-rater reliability • Split-half reliability • Steps to calculate reliability of data in SPSS 4/6/2019 IABM,BIKANER 2
- 3. Definition of reliability • The reliability of a measure indicate the extent to which it is without bias (error free) and hence ensures consistent measurement across time and across the various items in the instrument. 4/6/2019 IABM,BIKANER 3
- 4. Types of reliability 1. Test-retest reliability 2. Parallel-form reliability 3. Inter-rater reliability 4. Split-half reliability 4/6/2019 IABM,BIKANER 4
- 5. Test-retest reliability • The reliability coefficient obtained with a repetition of the same measure on a second occasion is called test-retest reliability. • In this type, the results are compared from time #1 to time #2 in order to determine how well the instrument consistently gets the same results. 4/6/2019 IABM,BIKANER 5
- 6. Alternate-form reliability • When responses on two comparable sets of measure tapping the same construct are highly correlated, we have alternate-form reliability. • Both forms have similar items and the same response format, the only changes being the sequence of the questions. 4/6/2019 IABM,BIKANER 6
- 7. Inter-rater reliability • In inter-rater ,the decisions from different raters are compared to each other to see how consistent the raters decisions are. • Raters are the researchers who rate or judge a variable in the research study. 4/6/2019 IABM,BIKANER 7
- 8. Split-half reliability • In split-half method ,the items on the scale are divided into two halves and the resulting half scores are correlated. • This is done by comparing the results of one half of a test with the results from the other half. 4/6/2019 IABM,BIKANER 8
- 9. Steps of to calculate reliability of data • Click Analyze > Scale > Reliability Analysis.. 4/6/2019 IABM,BIKANER 9