SlideShare a Scribd company logo
Peak-end bias
What we remember is different to what we experience
A group of patients had colonoscopies (Group A)
They were asked to record their pain on a scale of 1 - 10
throughout the procedure
Good afternoon
Mr Jones
You may experience
a little discomfort
Brace yourself!
Ooh…!
Here’s a graph of the pain recorded by Group A…
Pain
0
2.5
5
7.5
10
Time
Area under graph
= total pain
A second group of patients also had
colonoscopies (Group B)
They were also asked to record their pain on a
scale of 1 - 10 throughout the procedure
Good afternoon
Mr Smith
You may experience
a little discomfort
Brace yourself!
Hrrmphh…!
Here’s a graph of the pain recorded by Group B…
Pain
0
2.5
5
7.5
10
Time
Area under graph
= total pain
After the colonoscopy had finished, each group was
asked to evaluate how much pain they had suffered.
Pain
0
2.5
5
7.5
10
Time
Here’s a reminder of their recorded pain…
Pain
0
2.5
5
7.5
10
Time
Group B
Group A
Area under graph
= total pain
Area under graph
= total pain
Which group do you think said that they
had suffered more?
Group A…
How much pain did
you experience?
or Group B?
How much pain did
you experience?
Group B - said they had it worse, even though
they had in fact experienced less total pain
Group B - said they had it worse, even though they
had in fact experienced less total pain
Pain
0
2.5
5
7.5
10
Time
Pain
0
2.5
5
7.5
10
Time
Area under graph
= total pain
Area under graph
= total pain
Group A Group B
Why?
Why?
Even though Group B experienced less total pain, we
tend to recall events by focusing on our peak and end
experiences.
Both groups had experienced the same peak levels of
pain, but Group A’s colonoscopy ended less painfully…
Reference
Patients’ memories of painful medical treatments: real-time and retrospective evaluations of two
minimally invasive procedures
Donald A. Redelmeier and Daniel Kahneman
1996 Pain 116, 3-8

More Related Content

More from Bee Heller

Does imagining make it so?
Does imagining make it so?Does imagining make it so?
Does imagining make it so?
Bee Heller
 
Vividness effect on communication
Vividness effect on communicationVividness effect on communication
Vividness effect on communication
Bee Heller
 
Extraneous factors in judicial decisions
Extraneous factors in judicial decisionsExtraneous factors in judicial decisions
Extraneous factors in judicial decisions
Bee Heller
 
The Florida Effect
The Florida EffectThe Florida Effect
The Florida Effect
Bee Heller
 
Identity based decision making
Identity based decision makingIdentity based decision making
Identity based decision making
Bee Heller
 
The curse of knowledge
The curse of knowledgeThe curse of knowledge
The curse of knowledge
Bee Heller
 
The Yerkes-Dodson Law: stress (up to a point) improves performance
The Yerkes-Dodson Law: stress (up to a point) improves performanceThe Yerkes-Dodson Law: stress (up to a point) improves performance
The Yerkes-Dodson Law: stress (up to a point) improves performance
Bee Heller
 
The Stanford prison experiment: how our environment can affect our behaviour
The Stanford prison experiment: how our environment can affect our behaviourThe Stanford prison experiment: how our environment can affect our behaviour
The Stanford prison experiment: how our environment can affect our behaviour
Bee Heller
 
The halo effect
The halo effectThe halo effect
The halo effect
Bee Heller
 
Seeing the benefits of our work improves our persistence and performance
Seeing the benefits of our work improves our persistence and performanceSeeing the benefits of our work improves our persistence and performance
Seeing the benefits of our work improves our persistence and performance
Bee Heller
 
We conform to the choices of the people around us
We conform to the choices of the people around usWe conform to the choices of the people around us
We conform to the choices of the people around us
Bee Heller
 

More from Bee Heller (11)

Does imagining make it so?
Does imagining make it so?Does imagining make it so?
Does imagining make it so?
 
Vividness effect on communication
Vividness effect on communicationVividness effect on communication
Vividness effect on communication
 
Extraneous factors in judicial decisions
Extraneous factors in judicial decisionsExtraneous factors in judicial decisions
Extraneous factors in judicial decisions
 
The Florida Effect
The Florida EffectThe Florida Effect
The Florida Effect
 
Identity based decision making
Identity based decision makingIdentity based decision making
Identity based decision making
 
The curse of knowledge
The curse of knowledgeThe curse of knowledge
The curse of knowledge
 
The Yerkes-Dodson Law: stress (up to a point) improves performance
The Yerkes-Dodson Law: stress (up to a point) improves performanceThe Yerkes-Dodson Law: stress (up to a point) improves performance
The Yerkes-Dodson Law: stress (up to a point) improves performance
 
The Stanford prison experiment: how our environment can affect our behaviour
The Stanford prison experiment: how our environment can affect our behaviourThe Stanford prison experiment: how our environment can affect our behaviour
The Stanford prison experiment: how our environment can affect our behaviour
 
The halo effect
The halo effectThe halo effect
The halo effect
 
Seeing the benefits of our work improves our persistence and performance
Seeing the benefits of our work improves our persistence and performanceSeeing the benefits of our work improves our persistence and performance
Seeing the benefits of our work improves our persistence and performance
 
We conform to the choices of the people around us
We conform to the choices of the people around usWe conform to the choices of the people around us
We conform to the choices of the people around us
 

Recently uploaded

在线办理(UVic毕业证书)维多利亚大学毕业证录取通知书一模一样
在线办理(UVic毕业证书)维多利亚大学毕业证录取通知书一模一样在线办理(UVic毕业证书)维多利亚大学毕业证录取通知书一模一样
在线办理(UVic毕业证书)维多利亚大学毕业证录取通知书一模一样
tdt5v4b
 
Sethurathnam Ravi: A Legacy in Finance and Leadership
Sethurathnam Ravi: A Legacy in Finance and LeadershipSethurathnam Ravi: A Legacy in Finance and Leadership
Sethurathnam Ravi: A Legacy in Finance and Leadership
Anjana Josie
 
Comparing Stability and Sustainability in Agile Systems
Comparing Stability and Sustainability in Agile SystemsComparing Stability and Sustainability in Agile Systems
Comparing Stability and Sustainability in Agile Systems
Rob Healy
 
20240608 QFM019 Engineering Leadership Reading List May 2024
20240608 QFM019 Engineering Leadership Reading List May 202420240608 QFM019 Engineering Leadership Reading List May 2024
20240608 QFM019 Engineering Leadership Reading List May 2024
Matthew Sinclair
 
Stuart Wilson the teams I have led - 2024
Stuart Wilson the teams I have led - 2024Stuart Wilson the teams I have led - 2024
Stuart Wilson the teams I have led - 2024
stuwilson.co.uk
 
Risk-Management-presentation for cooperatives
Risk-Management-presentation for cooperativesRisk-Management-presentation for cooperatives
Risk-Management-presentation for cooperatives
bernanbumatay1
 
Employment Practices Regulation and Multinational Corporations
Employment PracticesRegulation and Multinational CorporationsEmployment PracticesRegulation and Multinational Corporations
Employment Practices Regulation and Multinational Corporations
RoopaTemkar
 
一比一原版(QU毕业证)皇后大学毕业证如何办理
一比一原版(QU毕业证)皇后大学毕业证如何办理一比一原版(QU毕业证)皇后大学毕业证如何办理
一比一原版(QU毕业证)皇后大学毕业证如何办理
8p28uk6g
 
12 steps to transform your organization into the agile org you deserve
12 steps to transform your organization into the agile org you deserve12 steps to transform your organization into the agile org you deserve
12 steps to transform your organization into the agile org you deserve
Pierre E. NEIS
 
原版制作(CDU毕业证书)查尔斯达尔文大学毕业证PDF成绩单一模一样
原版制作(CDU毕业证书)查尔斯达尔文大学毕业证PDF成绩单一模一样原版制作(CDU毕业证书)查尔斯达尔文大学毕业证PDF成绩单一模一样
原版制作(CDU毕业证书)查尔斯达尔文大学毕业证PDF成绩单一模一样
tdt5v4b
 
原版制作(澳洲WSU毕业证书)西悉尼大学毕业证文凭证书一模一样
原版制作(澳洲WSU毕业证书)西悉尼大学毕业证文凭证书一模一样原版制作(澳洲WSU毕业证书)西悉尼大学毕业证文凭证书一模一样
原版制作(澳洲WSU毕业证书)西悉尼大学毕业证文凭证书一模一样
tdt5v4b
 
W.H.Bender Quote 66 - ServPoints Sequence of Service™ should be Identified fo...
W.H.Bender Quote 66 - ServPoints Sequence of Service™ should be Identified fo...W.H.Bender Quote 66 - ServPoints Sequence of Service™ should be Identified fo...
W.H.Bender Quote 66 - ServPoints Sequence of Service™ should be Identified fo...
William (Bill) H. Bender, FCSI
 
Credit-Management seminar for cooperative power point presentation
Credit-Management seminar for cooperative power point presentationCredit-Management seminar for cooperative power point presentation
Credit-Management seminar for cooperative power point presentation
bernanbumatay1
 
The Management Guide: From Projects to Portfolio
The Management Guide: From Projects to PortfolioThe Management Guide: From Projects to Portfolio
The Management Guide: From Projects to Portfolio
Ahmed AbdelMoneim
 
Leadership Ethics and Change, Purpose to Impact Plan
Leadership Ethics and Change, Purpose to Impact PlanLeadership Ethics and Change, Purpose to Impact Plan
Leadership Ethics and Change, Purpose to Impact Plan
Muhammad Adil Jamil
 
Make it or Break it - Insights for achieving Product-market fit .pdf
Make it or Break it - Insights for achieving Product-market fit .pdfMake it or Break it - Insights for achieving Product-market fit .pdf
Make it or Break it - Insights for achieving Product-market fit .pdf
Resonate Digital
 
Public Speaking Tips to Help You Be A Strong Leader.pdf
Public Speaking Tips to Help You Be A Strong Leader.pdfPublic Speaking Tips to Help You Be A Strong Leader.pdf
Public Speaking Tips to Help You Be A Strong Leader.pdf
Pinta Partners
 
Colby Hobson: Residential Construction Leader Building a Solid Reputation Thr...
Colby Hobson: Residential Construction Leader Building a Solid Reputation Thr...Colby Hobson: Residential Construction Leader Building a Solid Reputation Thr...
Colby Hobson: Residential Construction Leader Building a Solid Reputation Thr...
dsnow9802
 
在线办理(Murdoch毕业证书)莫道克大学毕业证电子版成绩单一模一样
在线办理(Murdoch毕业证书)莫道克大学毕业证电子版成绩单一模一样在线办理(Murdoch毕业证书)莫道克大学毕业证电子版成绩单一模一样
在线办理(Murdoch毕业证书)莫道克大学毕业证电子版成绩单一模一样
tdt5v4b
 
Resource-mobilization-guide-for-community-based-organizations1.pdf
Resource-mobilization-guide-for-community-based-organizations1.pdfResource-mobilization-guide-for-community-based-organizations1.pdf
Resource-mobilization-guide-for-community-based-organizations1.pdf
FeteneA
 

Recently uploaded (20)

在线办理(UVic毕业证书)维多利亚大学毕业证录取通知书一模一样
在线办理(UVic毕业证书)维多利亚大学毕业证录取通知书一模一样在线办理(UVic毕业证书)维多利亚大学毕业证录取通知书一模一样
在线办理(UVic毕业证书)维多利亚大学毕业证录取通知书一模一样
 
Sethurathnam Ravi: A Legacy in Finance and Leadership
Sethurathnam Ravi: A Legacy in Finance and LeadershipSethurathnam Ravi: A Legacy in Finance and Leadership
Sethurathnam Ravi: A Legacy in Finance and Leadership
 
Comparing Stability and Sustainability in Agile Systems
Comparing Stability and Sustainability in Agile SystemsComparing Stability and Sustainability in Agile Systems
Comparing Stability and Sustainability in Agile Systems
 
20240608 QFM019 Engineering Leadership Reading List May 2024
20240608 QFM019 Engineering Leadership Reading List May 202420240608 QFM019 Engineering Leadership Reading List May 2024
20240608 QFM019 Engineering Leadership Reading List May 2024
 
Stuart Wilson the teams I have led - 2024
Stuart Wilson the teams I have led - 2024Stuart Wilson the teams I have led - 2024
Stuart Wilson the teams I have led - 2024
 
Risk-Management-presentation for cooperatives
Risk-Management-presentation for cooperativesRisk-Management-presentation for cooperatives
Risk-Management-presentation for cooperatives
 
Employment Practices Regulation and Multinational Corporations
Employment PracticesRegulation and Multinational CorporationsEmployment PracticesRegulation and Multinational Corporations
Employment Practices Regulation and Multinational Corporations
 
一比一原版(QU毕业证)皇后大学毕业证如何办理
一比一原版(QU毕业证)皇后大学毕业证如何办理一比一原版(QU毕业证)皇后大学毕业证如何办理
一比一原版(QU毕业证)皇后大学毕业证如何办理
 
12 steps to transform your organization into the agile org you deserve
12 steps to transform your organization into the agile org you deserve12 steps to transform your organization into the agile org you deserve
12 steps to transform your organization into the agile org you deserve
 
原版制作(CDU毕业证书)查尔斯达尔文大学毕业证PDF成绩单一模一样
原版制作(CDU毕业证书)查尔斯达尔文大学毕业证PDF成绩单一模一样原版制作(CDU毕业证书)查尔斯达尔文大学毕业证PDF成绩单一模一样
原版制作(CDU毕业证书)查尔斯达尔文大学毕业证PDF成绩单一模一样
 
原版制作(澳洲WSU毕业证书)西悉尼大学毕业证文凭证书一模一样
原版制作(澳洲WSU毕业证书)西悉尼大学毕业证文凭证书一模一样原版制作(澳洲WSU毕业证书)西悉尼大学毕业证文凭证书一模一样
原版制作(澳洲WSU毕业证书)西悉尼大学毕业证文凭证书一模一样
 
W.H.Bender Quote 66 - ServPoints Sequence of Service™ should be Identified fo...
W.H.Bender Quote 66 - ServPoints Sequence of Service™ should be Identified fo...W.H.Bender Quote 66 - ServPoints Sequence of Service™ should be Identified fo...
W.H.Bender Quote 66 - ServPoints Sequence of Service™ should be Identified fo...
 
Credit-Management seminar for cooperative power point presentation
Credit-Management seminar for cooperative power point presentationCredit-Management seminar for cooperative power point presentation
Credit-Management seminar for cooperative power point presentation
 
The Management Guide: From Projects to Portfolio
The Management Guide: From Projects to PortfolioThe Management Guide: From Projects to Portfolio
The Management Guide: From Projects to Portfolio
 
Leadership Ethics and Change, Purpose to Impact Plan
Leadership Ethics and Change, Purpose to Impact PlanLeadership Ethics and Change, Purpose to Impact Plan
Leadership Ethics and Change, Purpose to Impact Plan
 
Make it or Break it - Insights for achieving Product-market fit .pdf
Make it or Break it - Insights for achieving Product-market fit .pdfMake it or Break it - Insights for achieving Product-market fit .pdf
Make it or Break it - Insights for achieving Product-market fit .pdf
 
Public Speaking Tips to Help You Be A Strong Leader.pdf
Public Speaking Tips to Help You Be A Strong Leader.pdfPublic Speaking Tips to Help You Be A Strong Leader.pdf
Public Speaking Tips to Help You Be A Strong Leader.pdf
 
Colby Hobson: Residential Construction Leader Building a Solid Reputation Thr...
Colby Hobson: Residential Construction Leader Building a Solid Reputation Thr...Colby Hobson: Residential Construction Leader Building a Solid Reputation Thr...
Colby Hobson: Residential Construction Leader Building a Solid Reputation Thr...
 
在线办理(Murdoch毕业证书)莫道克大学毕业证电子版成绩单一模一样
在线办理(Murdoch毕业证书)莫道克大学毕业证电子版成绩单一模一样在线办理(Murdoch毕业证书)莫道克大学毕业证电子版成绩单一模一样
在线办理(Murdoch毕业证书)莫道克大学毕业证电子版成绩单一模一样
 
Resource-mobilization-guide-for-community-based-organizations1.pdf
Resource-mobilization-guide-for-community-based-organizations1.pdfResource-mobilization-guide-for-community-based-organizations1.pdf
Resource-mobilization-guide-for-community-based-organizations1.pdf
 

Peak-end bias