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A/B-testing 
HOW, W H E N , E X A M P L E S & P I T T FA L L S 
L e a n C o n f e r e n c e – N o v e m b e r 1 7 t h - M a n c h e s t e r 
To n Wes s e l i n g – C E O – Te s t i n g . A g e n c y
Manchester 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Should I go for City? 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Should I go for United? 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Manchester 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
A/B-testing 
A/B-testing != CRO 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
A/B-testing 
CRO != user knowledge 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
A/B-testing 
A/B-testing 
== 
user knowledge 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
A/B-testing 
HOW & WHEN 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
A/B-testing 
EXAMPLES 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
A/B-testing 
PITTFALLS 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Ton Wesseling | @ TonW 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014 
ü More testing 
ü Quality Assurance 
ü Lower pricing
Online Experiments – A/B-testing 
Default" 
Variation 
B" 
Variation 
Winner!" 
A" 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Hyperlink junky 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Digging through log files 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Trying to improve 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Over and over again 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
What most start-ups do 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
That is: 
0 / 1 Testing 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Why can this lead to failures? 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
0/1 Testing: weekly change? 
26 out of 44 weeks: over 5% change! 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Testing should be like: 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Scientific approach 
A / B Testing 
Live Online Research 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Experiments 
“If you double the number of 
experiments you do per year 
you’re going to double your 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014 
inventiveness” 
Jeff Bezos, CEO Amazon – 2004!
Growth like Amazon 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014 
German Ecommerce market, thank you André Morys
Experiments per year 
1000+ 
(but it did not start like that) 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Growth curve 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Phase 1: test solutions 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Fake adwords testing 
Do they 
click 
on your idea? 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Fake facebook testing 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014 
Do they 
like 
your idea?
Fake landing page testing 
Do they 
subscribe 
to your idea? 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Make sure it’s not 
0 / 1 Testing 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Once you bridged the gap 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
The growth phase! 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Duplicate? 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
It’s the web, it’s scalable! 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
You need to optimize! 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Over and over again 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
It takes many experiments to win 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Maximize your test capacity 
Time 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014 
Conversion%
Speed up – more people 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Growth like Amazon 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014 
German Ecommerce market, thank you André Morys
Real growth 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
It takes heavy experimenting 
250+ in a year 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Not every experiment is successful 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
It takes a full stadium a week for 250+ 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Or roughly 
1000+ 
conversion points 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Too slow? Energy will run out! 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
And you will never get this 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
You need the real fast paced culture 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
How does Bill win? 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Emotion vs Ratio 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Why is your user here? 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
How can you 
help your user’s brain 
to fullfil it’s needs? 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
It’s not about A/B-testing 
Growth is about learning 
how to serve brains! 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Testing costs time 
Use it to LEARN 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
FACT & ACT – 7 s t e p s t o l e a r n 
Find Analyze 
Create 
Test 
& 
Analyze Conclude 
Tell 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Now: f o c u s o n C TA 
Create 
Test 
Analyze 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Create = Data & Psychology 
Analyze 
& 
Experiment 
Digital Data 
Persuasion Psychology 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Wheel-of-Persuasion.com 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Persuasion on forms 
+25% sales 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Same technique 
Significant more 
submits, but.. 
Less registrations 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
A small sentence 
+18% 
sales 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
But also 
+10% applications 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Motivation 
Winner 
(sales) 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Win your own form A/B-test 
http://testing.agency/manchester 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
And social proof? 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014 
Many went before you 
In november 1.675 
people applied for 
a loan at MoneYou. 
Winner 
(sales)
Chunk your USP’s 
+14% 
sales 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
With learning: Phase 3 becomes easier 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Testing becomes user knowledge 
Conversion)Op,miza,on) Market'Research' 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Pittfalls 
How NOT to test 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
A/B-testing can be 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Don’t trust your A/B-test analytics 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
It keeps you away from this failure 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Enough traffic & conversions? 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Low significance levels 
ü Big chance the winner is not a real winner 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Low power levels 
ü Big chance a real winner is not recognized 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Tested percentage is a spread! 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Example test-setup 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Average power: 40% 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
So: 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Another error warning: 
ü You just go and dig unitil you find something 
(you will always find something that seems true BUT is not!) 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
OK, results are in 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Not significant 
ü It’s not a winner, stop 
ü But, it’s does not mean it’s a loser! 
ü Average: 30% of your tests will have winners 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
More? 
http://ondi.me/contentverve 
http://ondi.me/conversionxl 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Conclude 
ü Do nothing? 
or 
ü Re-test? 
or 
ü Implement? 
or 
ü Scale? 
and 
ü Continue or change test roadmap 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Knowledge library: ABtestguide.com 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
It’s not about A/B-testing 
Growth is about learning 
how to serve brains! 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
So you will get this curve 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Growth like Amazon 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014 
German Ecommerce market, thank you André Morys
A/B-testing 
HOW & WHEN 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
A/B-testing 
EXAMPLES 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
A/B-testing 
PITTFALLS 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Slides & more 
http://testing.agency/manchester 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
Be like Bill, and win! 
Ton Wesseling | @ TonW 
#leanconf Manchester 2014
http://testing.agency/manchester 
HOW, W H E N , E X A M P L E S & P I T T FA L L S 
L e a n C o n f e r e n c e – N o v e m b e r 1 7 t h - M a n c h e s t e r 
To n Wes s e l i n g – C E O – Te s t i n g . A g e n c y

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A/B-testing #leanconf Manchester 2014: WHEN - HOW - EXAMPLES - PITFALLS

  • 1. A/B-testing HOW, W H E N , E X A M P L E S & P I T T FA L L S L e a n C o n f e r e n c e – N o v e m b e r 1 7 t h - M a n c h e s t e r To n Wes s e l i n g – C E O – Te s t i n g . A g e n c y
  • 2. Manchester Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 3. Should I go for City? Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 4. Should I go for United? Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 5. Manchester Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 6. A/B-testing A/B-testing != CRO Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 7. A/B-testing CRO != user knowledge Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 8. A/B-testing A/B-testing == user knowledge Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 9. A/B-testing HOW & WHEN Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 10. A/B-testing EXAMPLES Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 11. A/B-testing PITTFALLS Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 12. Ton Wesseling | @ TonW Ton Wesseling | @ TonW #leanconf Manchester 2014 ü More testing ü Quality Assurance ü Lower pricing
  • 13. Online Experiments – A/B-testing Default" Variation B" Variation Winner!" A" Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 14. Hyperlink junky Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 15. Digging through log files Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 16. Trying to improve Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 17. Over and over again Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 18. What most start-ups do Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 19. That is: 0 / 1 Testing Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 20. Why can this lead to failures? Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 21. 0/1 Testing: weekly change? 26 out of 44 weeks: over 5% change! Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 22. Testing should be like: Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 23. Scientific approach A / B Testing Live Online Research Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 24. Experiments “If you double the number of experiments you do per year you’re going to double your Ton Wesseling | @ TonW #leanconf Manchester 2014 inventiveness” Jeff Bezos, CEO Amazon – 2004!
  • 25. Growth like Amazon Ton Wesseling | @ TonW #leanconf Manchester 2014 German Ecommerce market, thank you André Morys
  • 26. Experiments per year 1000+ (but it did not start like that) Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 27. Growth curve Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 28. Phase 1: test solutions Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 29. Fake adwords testing Do they click on your idea? Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 30. Fake facebook testing Ton Wesseling | @ TonW #leanconf Manchester 2014 Do they like your idea?
  • 31. Fake landing page testing Do they subscribe to your idea? Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 32. Make sure it’s not 0 / 1 Testing Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 33. Once you bridged the gap Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 34. The growth phase! Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 35. Duplicate? Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 36. It’s the web, it’s scalable! Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 37. You need to optimize! Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 38. Over and over again Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 39. It takes many experiments to win Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 40. Maximize your test capacity Time Ton Wesseling | @ TonW #leanconf Manchester 2014 Conversion%
  • 41. Speed up – more people Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 42. Growth like Amazon Ton Wesseling | @ TonW #leanconf Manchester 2014 German Ecommerce market, thank you André Morys
  • 43. Real growth Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 44. It takes heavy experimenting 250+ in a year Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 45. Not every experiment is successful Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 46. It takes a full stadium a week for 250+ Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 47. Or roughly 1000+ conversion points Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 48. Too slow? Energy will run out! Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 49. And you will never get this Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 50. You need the real fast paced culture Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 51. How does Bill win? Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 52. Emotion vs Ratio Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 53. Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 54. Why is your user here? Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 55. How can you help your user’s brain to fullfil it’s needs? Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 56. It’s not about A/B-testing Growth is about learning how to serve brains! Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 57. Testing costs time Use it to LEARN Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 58. FACT & ACT – 7 s t e p s t o l e a r n Find Analyze Create Test & Analyze Conclude Tell Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 59. Now: f o c u s o n C TA Create Test Analyze Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 60. Create = Data & Psychology Analyze & Experiment Digital Data Persuasion Psychology Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 61. Wheel-of-Persuasion.com Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 62. Persuasion on forms +25% sales Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 63. Same technique Significant more submits, but.. Less registrations Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 64. A small sentence +18% sales Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 65. But also +10% applications Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 66. Motivation Winner (sales) Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 67. Win your own form A/B-test http://testing.agency/manchester Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 68. And social proof? Ton Wesseling | @ TonW #leanconf Manchester 2014 Many went before you In november 1.675 people applied for a loan at MoneYou. Winner (sales)
  • 69. Chunk your USP’s +14% sales Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 70. With learning: Phase 3 becomes easier Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 71. Testing becomes user knowledge Conversion)Op,miza,on) Market'Research' Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 72. Pittfalls How NOT to test Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 73. A/B-testing can be Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 74. Don’t trust your A/B-test analytics Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 75. It keeps you away from this failure Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 76. Enough traffic & conversions? Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 77. Low significance levels ü Big chance the winner is not a real winner Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 78. Low power levels ü Big chance a real winner is not recognized Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 79. Tested percentage is a spread! Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 80. Example test-setup Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 81. Average power: 40% Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 82. So: Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 83. Another error warning: ü You just go and dig unitil you find something (you will always find something that seems true BUT is not!) Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 84. OK, results are in Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 85. Not significant ü It’s not a winner, stop ü But, it’s does not mean it’s a loser! ü Average: 30% of your tests will have winners Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 86. More? http://ondi.me/contentverve http://ondi.me/conversionxl Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 87. Conclude ü Do nothing? or ü Re-test? or ü Implement? or ü Scale? and ü Continue or change test roadmap Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 88. Knowledge library: ABtestguide.com Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 89. It’s not about A/B-testing Growth is about learning how to serve brains! Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 90. So you will get this curve Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 91. Growth like Amazon Ton Wesseling | @ TonW #leanconf Manchester 2014 German Ecommerce market, thank you André Morys
  • 92. A/B-testing HOW & WHEN Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 93. A/B-testing EXAMPLES Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 94. A/B-testing PITTFALLS Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 95. Slides & more http://testing.agency/manchester Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 96. Be like Bill, and win! Ton Wesseling | @ TonW #leanconf Manchester 2014
  • 97. http://testing.agency/manchester HOW, W H E N , E X A M P L E S & P I T T FA L L S L e a n C o n f e r e n c e – N o v e m b e r 1 7 t h - M a n c h e s t e r To n Wes s e l i n g – C E O – Te s t i n g . A g e n c y