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@krstnfx kristina.io
C H A L L E N G I N G Y O U R
A S S U M P T I O N S
K R I S T I N A F O X
kristina.io@krstnfx
https://twitter.com/AndrewNadeau0/status/839731018978459648
kristina.io@krstnfx
乞
Hi, Im Kristina #
M O M  S F I R S T D AY W I T H A N
I P H O N E
kristina.io@krstnfx
https://xkcd.com/627/
Tech Support Cheat Sheet
kristina.io@krstnfx
$#
Ooh I can take pictures
now!
Yes, mom

Me
kristina.io@krstnfx
$#
Whats this thing? Its a search bar
3 hours later
kristina.io@krstnfx
$#
How come the buttons
keep wiggling?
What? Oh youre holding
down too long
kristina.io@krstnfx
$#
Why cant I open
YouTube?
Youre pressing too hard
on the screen
A S S U M P T I O N S W E
M A K E B U I L D I N G A P P S
A S S U M P T I O N # 1
 W E L L , M O S T U S E R S W I L L H AV E [ I N S E R T
L AT E S T F E AT U R E H E R E ] B Y T H E I R N E X T
P H O N E
kristina.io@krstnfx
$#
Why cant I open
YouTube?
Youre pressing too hard
on the screen
kristina.io@krstnfx
T H I N G S T O C O N S I D E R ( E X T E R N A L FA C T O R S )
 Having features turned off
 Network speed (globally)
kristina.io@krstnfx
T H I N G S T O C O N S I D E R ( I N O U R C O N T R O L )
 Performance/memory usage
 Battery
 Backwards compatibility
kristina.io@krstnfx
R E P E AT I N G F U N C T I O N A L I T Y
A S S U M P T I O N # 2
 O U R U S E R S W I L L G E T I T E V E N T U A L LY
kristina.io@krstnfx
I C O N O G R A P H Y
kristina.io@krstnfx
kristina.io@krstnfx
kristina.io@krstnfx
kristina.io@krstnfx
I O S 8 S H I F T K E Y
kristina.io@krstnfx
iOS 8 iOS 9
kristina.io@krstnfx
- S L AVA P E S T O V
A mistake many programmers make is deprioritizing bugs with
known workarounds. You dont want your users learning to avoid
certain features.
https://twitter.com/slava_pestov/status/861444737886167040
A S S U M P T I O N # 3
 P E O P L E W I T H D I S A B I L I T I E S D O N  T U S E
O U R A P P
kristina.io@krstnfx
https://www.youtube.com/watch?v=whioDJ8doYA#t=40s
kristina.io@krstnfx
 D AV I D S T O R E Y
By designing for someone with a permanent disability, someone
with a situational disability can also benefit.
https://twitter.com/dstorey/status/649636741033279488
kristina.io@krstnfx
https://www.microsoft.com/en-us/design/inclusive
Impairment is more common than you think
kristina.io@krstnfx
https://www.microsoft.com/en-us/design/inclusive
kristina.io@krstnfx
https://www.microsoft.com/en-us/design/inclusive
kristina.io@krstnfx
https://www.microsoft.com/en-us/design/inclusive
AV O I D I N G T H E
A S S U M P T I O N M I N D S E T
S U G G E S T I O N # 1
B E TA T E S T W I T H P E O P L E A R O U N D Y O U
S U G G E S T I O N # 2
D E V E L O P W I T H A C C E S S I B I L I T Y I N M I N D
F R O M T H E B E G I N N I N G
kristina.io@krstnfx
Q U I C K B O O K S S E L F - E M P L O Y E D
kristina.io@krstnfx
Q U I C K B O O K S S E L F - E M P L O Y E D
kristina.io@krstnfx
- S L AVA P E S T O V
A mistake many programmers make is deprioritizing bugs with
known workarounds. You dont want your users learning to avoid
certain features.
https://twitter.com/slava_pestov/status/861444737886167040
S U G G E S T I O N # 3
G E T I N T H E M I N D O F Y O U R U S E R S
kristina.io@krstnfx
kristina.io@krstnfx
%&
Hi! I noticed youre
planning to purchase this
boxed software.
Uh. Yeah?
kristina.io@krstnfx
%&
So can I see how you
install the software at your
house?
What?
kristina.io@krstnfx
%&
Dont worry, you can trust
me!
Well, ok I guess.
kristina.io@krstnfx
kristina.io@krstnfx
What people say they do and what they
actually do is usually different
A S S U M P T I O N S W E
M A K E O N O U R T E A M S
A S S U M P T I O N # 4
 J O H N I S T H E E X P E R T O N T H AT F E AT U R E .
G I V E T H E W O R K T O H I M
kristina.io@krstnfx
http://futurice.com/blog/from-t-to-pi-design-skill-expectations-in-change
kristina.io@krstnfx
https://twitter.com/justkelly_ok/status/852140422432292864
- K E L LY E L L I S
If you have a manager who always gives the senior guy on the team
all the interesting work, you wont get promoted. Seen it happen.
A S S U M P T I O N # 5
 T O M D I D N  T S AY A N Y T H I N G D U R I N G O U R
M E E T I N G S O H E D O E S N  T H AV E A N O P I N I O N
O N I T
kristina.io@krstnfx
https://www.ted.com/talks/susan_cain_the_power_of_introverts
kristina.io@krstnfx
D I V E R S E T E A M S M A K E B E T T E R P R O D U C T S
 Homogeneous thinking produces false sense of progress
 Diverse teams feel less comfortable, but perform better
 Focus on and process facts more carefully
 More innovative
https://hbr.org/2016/09/diverse-teams-feel-less-comfortable-and-thats-why-they-perform-better
https://hbr.org/2016/11/why-diverse-teams-are-smarter
A S S U M P T I O N # 6
 A M Y A S K E D A L O T O F Q U E S T I O N S . S H E
C L E A R LY D O E S N  T K N O W W H AT S H E  S D O I N G
kristina.io@krstnfx
 L I Z A M U N D Y, T H E AT L A N T I C
[There was] a whiteboarding session [where] a problem had an error
in it; when one female job candidate sensed this and kept asking
questions, evaluators felt that all her questions suggested she wasnt
competent
https://www.theatlantic.com/magazine/archive/2017/04/why-is-silicon-valley-so-awful-to-women/517788/
S U G G E S T I O N
O B S E R V E Y O U R O W N T E A M A N D S AY
S O M E T H I N G
http://projectinclude.org/recommendations/
kristina.io@krstnfx
- A L A N A L D A
Your assumptions are your windows on the
world. Scrub them off every once in awhile, or
the light won't come in.
T H A N K S !
kristina.io
@krstnfx
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