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Lessons from famous detectives for testers

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Lessons from famous detectives for testers for TestBash conference the 13th of April.

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Lessons from famous detectives for testers

  1. 1. Geoffrey van der Tas Lessons from Famous Detectives for Testers
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  4. 4. 4 The Sherlock Brain Detectives Logical Over Emotional Objective Over Subjective Unbias vs Bias
  5. 5. 5 Detective/Tester Model Detection Absorbing Deduction Knowledge Base Test
  6. 6. 6 Finding as much useful information as possible Detection • Visual observations • Listening • Reading • Talking • Using • Tasting (Ok not for us)
  7. 7. 7 How many triangles can you see? Detection
  8. 8. 8 Detection – Let’s test your skills Detectives
  9. 9. 9 Who is a serial killer? Detection
  10. 10. 10 Detection Detectives
  11. 11. 11 Detection Absorbing Detective/Tester Model
  12. 12. 12 Absorbing Detectives
  13. 13. 13 Motivation to Remember Absorbing Explain Manipulate Play Describe
  14. 14. 14 Chunking Absorbing 32735672189 327 3567 2189 B Z U K R O L D I L BZUK ROL DIL
  15. 15. 15 Let’s challenge your memory Absorbing
  16. 16. 16 Let’s challenge your memory Detectives
  17. 17. 17 Whats the answer Absorbing
  18. 18. 18 Let’s challenge your memory Absorbing
  19. 19. 19 Let’s challenge your memory Detectives
  20. 20. 20 What color are the windows of the building on the right? Absorbing 1. Green 2. Blue 3. Brown 4. Grey
  21. 21. 21 Detectives Detection Absorbing Knowledge Base
  22. 22. 22 The Sherlock brain Knowledge Base
  23. 23. 23 Mind Palace Knowledge Base 1. Choose your palace 2. Use Noticeable Features 3. Know the route in Your Mind 4. Associate – Connect 5. Repeat the Journey
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  25. 25. 25 Detectives Detection Absorbing Deduction Knowledge Base
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  27. 27. 27 So what is Deduction Detectives Theory Predictions Facts Deduction is the process of reaching a conclusion about something because of other things that you know to be true.
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  29. 29. 29 Reasoning Backwards Detectives After reading this sentence, you will realize that the the brain doesn’t recognize a second ‘the’.
  30. 30. 30 Reasoning Backwards Detectives Cause Effect Action Expected Result Actual Result Given When Then
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  33. 33. 33 Reasoning Backwards Detectives Cause Effect Action Expected Result Actual Result Given When Then Investigate Analyse Learn
  34. 34. 34 Example Deduction So my cat lost 1 kilo over the summer, but in the winter she eats like crazy and gains 1,5 kilo. Last week she was ill and lost another 1 kilo, she was only 4 kilo’s at that moment. What was het weight before the summer? End 4,5Kg 4 Kg Lost another 1 kilo 5 Kg Gains 1,5 kilo 3,5 Kg Lost 1 kilo
  35. 35. 35 Forward & Backwards reasoning Deduction Cause Effect
  36. 36. 36 Deduction
  37. 37. 37 Detectives Detection Absorbing Deduction Knowledge Base Test
  38. 38. 38 My Test Detectives
  39. 39. 39 Goal. Model. Techniques. Detection Absorbing Deduction Knowledge Base Test Do not jump into hasty conclusions MTR Chunking Mind palace Reasoning Backwards
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  41. 41. 41 Geoffrey van der Tas Agile Test Consultant @gavdtas LinkedIn.com/Geoffreyvdtas Slides: “My name is Geoffrey, tester! It is my business to know what other people don’t know.” Detectives
  42. 42. 43 Used Materials  Books: - How to Think Like Sherlock, Daniel Smith; - Mastermind - leer denken als Sherlock Holmes, Maria Konnikova; - Thinking, Fast and Slow, Daniel Kahneman;  Video: - Netflix, Sherlock S1E1.  Internet: - https://www.verywellmind.com/chunking-how-can-this-technique-improve-your-memory-2794969 - https://artofmemory.com/wiki/How_to_Build_a_Memory_Palace

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