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Selenium Conference keynote on cognitive bias, testing and Martians.
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Liz Keogh
@lunivore
A story because we all love
sleeping
Observe data
Filter data
Generate assumptions
Draw conclusions
Build beliefs
Cydonia, Viking 1, 1976
Cydonia, Viking 1, 1976
Scenarios
Given a context
When an event happens
Then an outcome should occur
Examples
Given Fred has bought a microwave
And the microwave cost £100
When we refund the microwave
Then Fred should be refunded £100.
Is there a context in which this event will create a different outcome?
Context Questioning
Cydonia, Mars Reconnaisance Orbiter, 2006
Martian channels by Percival Lowell
Confirmation Bias
Think we’re right
Look for validation Feel really good!
Confirmation Bias
Think we’re right
Find out we’re not Boo!
Google effect
Apophenia Pareidolia
Confirmation Bias
Actor-Observer
Bias
Illusion of Control
Insensitivity to sample
size
Omission bias
Negativity bias
Naïve cynicism
Fundamental Attribution
Error
System justification
Worse-than-average effect
Illusion of transparency
Trait ascryption
bias
Cryptomnesia
Choice-supportive
bias Forer effect
Normalcy bias
Bandwagon effect
Decoy effect
Hyperbolic discounting
Restraint bias
Stereotyping
Distinction bias
Pseudocertainty effect
Pessimism bias
Optimism bias
Moral luck
False consensus
effect
Anchoring
Congruence bias
Overconfidence effect
Loss Aversion
159 Cognitive Biases on Wikipedia
Observe data
Filter data
Generate assumptions
Draw conclusions
Build beliefs
Scenarios
Given a context
When an event happens
Then an outcome should occur
Traditional
Rework
Developers Testers
Deliberate Discovery skills
Behavior Driven Development
Less Rework
Developers Testers
Deliberate Discovery skills
Testers
Is there a context in which this event will create a different outcome?
Context Questioning
Is this the only outcome that matters?
Outcome Questioning
Options have value.
Options expire.
Never commit early unless you know why.
The Huddle
Developer
Is there a different context which might have produced
this outcome?
Assumption Questioning
“Nobody loves me.”
A story because we all love
sleeping
Liz Keogh [email protected] @lunivore
