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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 r...
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                  ...
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           TestersDeliber...
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
How to test the inside of your head
How to test the inside of your head
How to test the inside of your head
How to test the inside of your head
How to test the inside of your head
How to test the inside of your head
How to test the inside of your head
How to test the inside of your head
How to test the inside of your head
How to test the inside of your head
How to test the inside of your head
How to test the inside of your head
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How to test the inside of your head

Selenium Conference keynote on cognitive bias, testing and Martians.

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How to test the inside of your head

  1. 1. Liz Keogh@lunivore
  2. 2. A storybecause we all love sleeping
  3. 3. Build beliefs Draw conclusionsGenerate assumptions Filter data Observe data
  4. 4. Cydonia, Viking 1, 1976
  5. 5. Cydonia, Viking 1, 1976
  6. 6. Scenarios Given a context When an event happensThen an outcome should occur
  7. 7. ExamplesGiven Fred has bought a microwave And the microwave cost £100 When we refund the microwaveThen Fred should be refunded £100.
  8. 8. Context QuestioningIs there a context in which this event will create a different outcome?
  9. 9. Cydonia, Mars Reconnaisance Orbiter, 2006
  10. 10. Martian channelsby Percival Lowell
  11. 11. Confirmation Bias Think we’re rightFeel really good! Look for validation
  12. 12. Confirmation Bias Think we’re rightBoo! Find out we’re not
  13. 13. 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
  14. 14. Build beliefs Draw conclusionsGenerate assumptions Filter data Observe data
  15. 15. Scenarios Given a context When an event happensThen an outcome should occur
  16. 16. Traditional ReworkDevelopers Testers Deliberate Discovery skills
  17. 17. Behavior Driven Development Less Rework Testers Developers TestersDeliberate Discovery skills
  18. 18. Context QuestioningIs there a context in which this event will create a different outcome?
  19. 19. Outcome QuestioningIs this the only outcome that matters?
  20. 20. Options have value. Options expire. Never commit earlyunless you know why.
  21. 21. The Huddle Developer
  22. 22. Assumption QuestioningIs there a different contextwhich might have produced this outcome?
  23. 23. “Nobody loves me.”
  24. 24. A storybecause we all love sleeping
  25. 25. Liz Keoghliz@lunivore.com@lunivore

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