Notice which system is driving

Before deciding, ask whether this is a System 1 (snap) or System 2 (effortful) problem.

Why it works

System 1 produces answers effortlessly and System 2 tends to accept them without checking. Simply labeling a decision as "this is a System 1 answer" interrupts the automatic endorsement and recruits deliberate attention, which is the only mode that can catch the intuition when it is wrong.

How to do it

1. When an answer arrives instantly, pause and name it: "that was an intuition, not an analysis."
2. Ask: would I bet money on this? High-stakes or unfamiliar problems warrant System 2.
3. For routine, low-stakes calls, let System 1 run — deliberation is a limited resource.

Evidence

The dual-process distinction is well established in cognitive psychology, though the tidy "two systems" packaging is a simplification of a messier reality. The core claim — that intuitive answers are accepted by default unless effortful checking intervenes — is robust. Kahneman and Frederick (2002) sharpen the mechanism: System 1 quietly swaps a hard question for an easier one ("attribute substitution"), which is precisely why the substitution goes unnoticed unless deliberate attention is recruited. (observational)

Treat "two systems" as a useful metaphor, not literal brain modules. The framing is a heuristic for noticing automaticity.

Sources

• Kahneman (2011), Thinking, Fast and Slow
• Evans & Stanovich (2013), dual-process theories review, Perspectives on Psychological Science
• Evans, J. St. B. T., & Stanovich, K. E. (2013). Dual-Process Theories of Higher Cognition: Advancing the Debate. Perspectives on Psychological Science, 8(3), 223–241.
• Kahneman, D., & Frederick, S. (2002). Representativeness revisited: Attribute substitution in intuitive judgment. In T. Gilovich, D. Griffin, & D. Kahneman (Eds.), Heuristics and Biases: The Psychology of Intuitive Judgment (pp. 49–81). Cambridge University Press.

Common mistake

Believing you can spot your own biases in the moment. You usually cannot — which is why the trigger has to be the type of problem, not a feeling of being biased.