Jumping to Conclusions
The tendency to form rapid judgments with limited information, often substituting a simple question for a harder one, driven by System 1's automatic assessments and the WYSIATI principle.
THE IDEA
SPEAKING OF JUMPING TO CONCLUSIONS
“She knows nothing about this person’s management skills. All she is going by is the halo effect from a good presentation.”
“Let’s decorrelate errors by obtaining separate judgments on the issue before any discussion. We will get more information from independent assessments.”
“They made that big decision on the basis of a good report from one consultant. WYSIATI—what you see is all there is. They did not seem to realize how little information they had.”
“They didn’t want more information that might spoil their story. WYSIATI.”
8
HOW JUDGMENTS HAPPEN
There is no limit to the number of questions you can answer, whether they are questions someone else asks or questions you ask yourself. Nor is there a limit to the number of attributes you can evaluate. You are capable of counting the number of capital letters on this page, comparing the height of the windows of your house to the one across the street, and assessing the political prospects of your senator on a scale from excellent to disastrous. The questions are addressed to System 2, which will direct attention and search memory to find the answers. System 2 receives questions or generates them: in either case it directs attention and searches memory to find the answers. System 1 operates differently. It continuously monitors what is going on outside and inside the mind, and continuously generates assessments of various aspects of the situation without specific intention and with little or no effort. These basic assessments play an important role in intuitive judgment, because they are easily substituted for more difficult questions—this is the essential idea of the heuristics and biases approach. Two other features of System 1 also support the substitution of one judgment for another. One is the ability to translate values across dimensions, which you do in answering a question that most people find easy: “If Sam were as tall as he is intelligent, how tall would he be?” Finally, there is the mental shotgun. An intention of System 2 to answer a specific question or evaluate a particular attribute of the situation automatically triggers other computations, including basic assessments.
When to use it
Evaluating a job candidate based on a single impressive presentation, ignoring other evidence like past performance or references.
Making a business decision based on a single positive report without triangulating with other data sources.
Forming a medical diagnosis based on initial symptoms without considering alternative explanations.
Forming political opinions based on a single speech or appearance, overlooking a candidate's full record.
FROM THEORY TO EVERYDAY LIFE
In practice
Halo Effect in Hiring
A manager judges a candidate's management skills based solely on a good presentation, ignoring other evidence. This is a case of jumping to conclusions driven by the halo effect and limited information.
Consultant Report Decision
A company makes a major decision based on a single positive report from one consultant, without seeking additional data. Through WYSIATI, the company fails to realize how little information was available.
Suppressing Contrary Information
A team avoids gathering more information that might spoil their preferred story, demonstrating a reluctance to challenge initial conclusions.
A MOMENT TO REFLECT
Put it to work.
Recall a recent decision where you relied on limited information. What assumptions did you make and how might they have been biased?
How can you decorrelate errors by seeking independent opinions before group discussion?
In what situations do you notice yourself substituting an easy question (e.g., 'Do I like this person?') for a harder one (e.g., 'Is this person competent?')?
References
- Thinking, Fast and Slow — Daniel Kahneman (2011)
CONTINUE THE CONVERSATION
Source texts
- Thinking, Fast and Slow (Daniel Kahneman)