Cognitive Distortions: How System 1 Thinking Deceives You
Companion reading: Automatic Thoughts: Three Questions and Reflective Practice.
In this article, I explore the topic “Cognitive Distortions: How System 1 Thinking Deceives You”. I also wrote The Practical CBT Guide, if you would like to explore further.
System 1: the engine of automatic thoughts
When you receive a "we need to talk" message from your partner, the thought "they'll leave me" surfaces in less than a second. You didn't "choose" it. System 1 scanned tone, history, current fears in parallel—and delivered a ready-made interpretation.
Aaron Beck, founder of CBT, called these productions negative automatic thoughts (NATs). They share 4 characteristics:
- They arise without conscious effort
- They appear obvious
- They are emotionally charged
- They are rarely verified
Biases, Kahneman version
Kahneman cataloged dozens of cognitive biases. Some directly overlap with CBT distortions:
Availability bias: we judge the probability of an event by how easily it comes to mind. After seeing a plane crash report, flying feels dangerous—statistically it's ultra safe. Confirmation bias: we seek information that validates what we already believe. In a struggling couple, each collects proof the other is wrong. Anchoring: the first information received influences all subsequent ones. A real estate listing at €500,000 makes €450,000 seem "reasonable," even if the real market price is €380,000.System 2: the CBT tool
CBT work consists of voluntarily activating System 2 to examine System 1's productions. This is called cognitive restructuring.
The flagship tool is Beck's column, a 5-column table:
| Situation | Emotion | Automatic thought | Evidence for/against | Alternative thought |
|---|---|---|---|---|
| Meeting cancelled | Anxiety 8/10 | "I'm going to be fired" | For: 2. Against: 6 | "Likely managerial issue" |
Further reading
In brief: Explore the distinction between fast judgments and deliberate thinking, and the cognitive biases discussed in the article.
About the author
Gildas Garrec · CBT practitioner
Author of books and articles on applied psychology and relationships.
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