How to test the inside of your head
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How to test the inside of your head

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Selenium Conference keynote on cognitive bias, testing and Martians.

Selenium Conference keynote on cognitive bias, testing and Martians.

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    How to test the inside of your head How to test the inside of your head Presentation Transcript

    • Liz Keogh@lunivore
    • A storybecause we all love sleeping
    • Build beliefs Draw conclusionsGenerate assumptions Filter data Observe data
    • Cydonia, Viking 1, 1976
    • Cydonia, Viking 1, 1976
    • Scenarios Given a context When an event happensThen an outcome should occur
    • ExamplesGiven Fred has bought a microwave And the microwave cost £100 When we refund the microwaveThen Fred should be refunded £100.
    • Context QuestioningIs there a context in which this event will create a different outcome?
    • Cydonia, Mars Reconnaisance Orbiter, 2006
    • Martian channelsby Percival Lowell
    • Confirmation Bias Think we’re rightFeel really good! Look for validation
    • Confirmation Bias Think we’re rightBoo! Find out we’re not
    • System Illusion of justification Normalcy bias transparency Decoy effect Insensitivity Confirmation Loss Aversion False to sample Bandwagon Fundamental Bias consensus Pessimism size effect Attribution Negativity effect bias 159 Cognitive Omission bias Error DistinctionOptimism bias Hyperbolic bias bias Biases on Google effect Overconfidence discounting Illusion of Cryptomnesia Restraint bias Control Wikipedia Naïve cynicism effect Pseudocertainty Actor- StereotypingAnchoring effect Observer Choice- Apophenia Bias Worse-than- Pareidolia supportive Trait average bias ascryption Forer effect Congruence effect bias Moral luck
    • Build beliefs Draw conclusionsGenerate assumptions Filter data Observe data
    • Scenarios Given a context When an event happensThen an outcome should occur
    • Traditional ReworkDevelopers Testers Deliberate Discovery skills
    • Behavior Driven Development Less Rework Testers Developers TestersDeliberate Discovery skills
    • Context QuestioningIs there a context in which this event will create a different outcome?
    • Outcome QuestioningIs this the only outcome that matters?
    • Options have value. Options expire. Never commit earlyunless you know why.
    • The Huddle Developer
    • Assumption QuestioningIs there a different contextwhich might have produced this outcome?
    • “Nobody loves me.”
    • A storybecause we all love sleeping
    • Liz Keoghliz@lunivore.com@lunivore