Definition
A 2011 book by psychologist Daniel Kahneman that describes two modes of thought: System 1, which is fast, automatic, intuitive, and emotional; and System 2, which is slower, deliberate, analytical, and effortful. The book is referenced in aviation instruction because these two modes explain how pilots make decisions, where errors come from, and why deliberate practice is needed to build sound judgment.
Plain English
A book that explains how people think in two different ways: a quick, automatic way that runs in the background, and a slow, careful way that takes real effort. Instructors refer to it because both ways show up in the cockpit, and pilots need to know when to rely on each.
Context Anchor
Encountered in human nature, motivation, and decision-making discussions in the Aviation Instructor’s Handbook.
Derivation
The title comes from Daniel Kahneman’s 2011 book, Thinking, Fast and Slow. The words are plain English, but the title points to a specific idea: the mind can respond quickly and automatically, or it can slow down and reason carefully.
Why Pilots Care
Most cockpit errors are not from lack of knowledge but from the wrong thinking mode being used at the wrong time. Routine flying leans on fast, automatic thinking, but unusual situations demand slow, deliberate analysis. Knowing the difference helps pilots catch themselves before a quick assumption becomes a bad decision.
Grounding Statement
A pilot may quickly notice that something feels wrong, then use slower thinking to check the instruments, review the situation, and choose the safest next action.
Intuition Check
Do not read the title as simply meaning “some people think quickly and some people think slowly.” In this context, it means the same person uses both quick automatic thinking and slower careful thinking, depending on the situation.
Example Sentence 1
The instructor referenced Thinking, Fast and Slow to explain why the student's quick gut reaction during the diversion needed to be checked against a more deliberate analysis of fuel and weather.
Example Sentence 2
Reviewing the flight afterward helped the student shift from fast impressions to deliberate analysis of each decision.