Thinking, Fast and Slow by Daniel Kahneman Book Review
December 19, 2011 1 Comment
The book Thinking, Fast and Slow by Daniel Kahneman is a complete and outstanding study of the relatively new field of Behavioral Economics. The book is divided into five parts that analyze human behavior and the two systems that work together to form our judgments. I have outlined Part 1 of the book and I highly recommend you read the other four parts.
Thinking, Fast and Slow
Daniel Kahneman is a recipient of the Nobel Prize in Economics and has been a pioneer for the relatively new field of Behavioral Economics. He makes the assertion that there are two systems of judgment and choice. System 1 is intuitive and automatic while System 2 is more effortful and analytical. When you are asked to solve 2 + 2, System 1 is able to involuntarily answer the question. When you are asked to fill out a tax form, System 2 is needed to focus the required attention on the laborious task. If System 1 has a conflict that cannot be resolved, System 2 is able to process the problem in more analytical detail. The relationship of the two systems is highly efficient and System 2 is able to take charge in situations when there is a lack of self-control.
System 2 is characterized as being lazy and not going the full distance to solve a difficult problem. There was an experiment that was conducted in which System 2 would be fully engaged. The task was named Add-1 and pupil dilation was measured to study whether pupils shrink when participants quit a problem. It was found that within the first 5 seconds, the pupil dilates but immediately shrinks when a participant gives up on a task. System 2 relies on immense attention and effort to produce the required mental effort to solve a difficult problem.
Self-control is a significant problem for System 1 and is magnified when System 2 is cognitively busy. While System 2 controls thoughts and behaviors, System 1 struggles with temptations and impatience. The researcher Walter Mischel exposed children to an Oreo dilemma. They were to remain in a room with a single cookie and a bell. If they waited for the researcher, the child would get two cookies. It was found that the children who were able to resist the temptation scored incredibly higher on intelligence tests. The kids who exhibited more self-control were found to be less likely to get in trouble later on in their lives. Their System 2 and reasoning skills were considerably stronger than the other kids.
Kahneman realized that System 1 could be manipulated and act in accordance to the surrounding environment. The priming effect causes individual’s System 1 to become biased. If a person is primed with thoughts of old age, they begin to start walking slowly. This is known as the “Florida effect”. Individuals who are money-primed become more individualistic and selfish when faced with an opportunity to help someone. The priming scenarios arise in System 1 and there is no conscious access to the actions of the mind.
Cognitive strain helps reject the wrongly based intuitive answer of System 1 by assembling System 2. It is possible that System 1 is biased in rating words that are presented more often a higher ranking than unfamiliar words. This can be related to mood and how System 1 can be influenced when we are unhappy. When we are in a happy mood, System 2 is disengaged and the intuitive and creative process is enacted. We are also less surprised the second time an event occurs than on the first.
Jumping to conclusions should only be done when the costs are low and the situation is familiar. System 1 is able to make a guess that is guided by experience. The uncertainty and doubt are left to System 2 to handle. The halo effect occurs when the first impression is given more weight. Kahneman gave an example of his grading method in which he was biased by the first essay that he graded of each student. He would compare the subsequent essays to the initial impression of the first. He used a commitment device to reduce his biases by hiding the first grade of the essay to make the process fair. What you see is all there is (WYSIATI) exhibits why jumping to conclusions on limited evidence can be dangerous.
The mental shotgun refers to computing more information that one wants or needs. The conflict is that the irrelevant answers can be a disruption to the actual real answers. System 1 has a tendency to find a related question that is easier and answer that one. This is known as substitution and combines with the mental shotgun to generate quick answers without getting help from the lazy System 2.
Part of thinking fast and thinking slow is the ability for System 1 to work in conjunction with System 2. This process must be efficient and create a system that combines the intuitive and automatic with the analytical and deliberate.


