Thinking Fast with Slow
Fast thinking provides quick intuition while slow thinking offers deliberate analysis; rather than being alternatives, they work best as partners where slow thinking guides and corrects fast thinking.
THE IDEA
Thinking Fast with Slow
One prevailing view has been that those intuitive first reactions benefit from speed but lack accuracy. That is, we make do with fast thinking for the sake of efficiency, but in an ideal world, we would have time for deeper reflection. For example, see Kahneman, Thinking, Fast and Slow. Fast thinking has flaws, but we believe that fast and slow thinking are best seen not as alternatives but partners. Call it thinking fast with slow.
Footnotes:
- The authors acknowledge that their characterization of fast thinking may be somewhat unfair. They cite Kahneman, Thinking, Fast and Slow.
- Schank, “Interestingness: Controlling Inferences.”
- This note refers to a separate classroom source-evaluation example that is not included here.
- Caulfield, “A Short History of CRAAP.”
- Wineburg et al., “Evaluating Information.”
When to use it
When evaluating the credibility of online information, use fast thinking to spot red flags and slow thinking to verify sources.
During creative brainstorming, allow for rapid idea generation (fast thinking) before applying critical selection (slow thinking).
In high-pressure tasks like medical triage, trusted fast heuristics are paired with periodic slow reflection to catch errors.
When making a significant purchase, heed your initial emotional response but then research specifications and reviews deliberately.
FROM THEORY TO EVERYDAY LIFE
In practice
Quick Judgment Amid Distraction
A doctor in a busy emergency room makes a rapid diagnosis based on a few key symptoms (fast thinking). Later, when reviewing the case, they take time to consider test results and patient history (slow thinking) to confirm or adjust the initial diagnosis. This pairs an initial response with opportunities to check and revise it.
Evaluating a News Article
A reader quickly scans a headline and feels it aligns with their biases (fast thinking). Instead of sharing immediately, they pause to check the source, read the full article, and cross-reference facts (slow thinking). The fast first impression is not discarded but vetted by slower analysis.
A MOMENT TO REFLECT
Put it to work.
Recall a recent decision where your first intuition was correct. What deliberate steps (if any) did you take to confirm it?
In what areas of your life could you benefit from ‘thinking fast with slow’—letting slow thinking refine your rapid reflexes?
Think of a time when fast thinking led you astray. How could a slower, more analytical partner have improved the outcome?
References
- Thinking, Fast and Slow — Daniel Kahneman
- Interestingness: Controlling Inferences — Schank
- A Short History of CRAAP — Caulfield
- Evaluating Information — Wineburg
CONTINUE THE CONVERSATION
Source texts
- Verified How to Think Straight, Get Duped Less, and Make Better Decisions about What to Believe Online (Mike Caulfield, Sam Wineburg)