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Term

Dual-System Theory - Selection Logic

Fast intuitive vs slow deliberative thinking; explains why heuristics and biases coexist with analysis.

Aliases: Dual-process theory, System 1 / System 2

Definition

Dual-System Theory: Fast intuitive vs slow deliberative thinking; explains why heuristics and biases coexist with analysis.

1. Mechanism (why it happens)

Dual-system theories describe fast, automatic, intuitive processing versus slow, deliberative, reflective processing. Under time pressure, emotion, and cognitive load, the fast system dominates, increasing reliance on heuristics.[^1]

2. Classic experiments / evidence

2.1 Dual-process synthesis (Kahneman, 2011)

  • Design: Synthesis of experimental findings across judgment, attention, and decision-making.[^1]
  • Manipulation: Across studies: time pressure, cognitive load, salience, and framing.[^1]
  • Key finding: Fast intuitive judgments are efficient but systematically biased; reflective correction requires time/attention.[^1]
  • Notes/limitations: A synthesis rather than one experiment; useful as an integrative model.

2.2 Individual differences in reasoning (Stanovich & West, 2000)

  • Design: Studies linking reasoning performance to cognitive reflection and thinking dispositions.[^2]
  • Manipulation: Not a single manipulation; examines how reflective override varies across individuals.[^2]
  • Key finding: Reflective control varies; rational thinking is not identical to intelligence.[^2]
  • Notes/limitations: Supports the need for procedural aids rather than relying on willpower.

3. Consumer decision patterns

  • Under urgency, consumers choose based on one salient cue.
  • Narrative persuasion overrides evidence weighting.
  • Post-purchase regret increases when reflective evaluation was skipped.

4. How marketing leverages it

Persuasive design targets the fast system with urgency, social cues, and emotion; it reduces the time available for reflective comparison.[^1]

5. Mitigation (Selection Logic)

  1. Allocate cognitive budget to create “slow thinking space–for high stakes (T2).
  2. Use checklists and rubrics (M2/M4).
  3. Validate outcomes and iterate (M5).

References

  1. Kahneman, D. (2011). Thinking, Fast and Slow. Farrar, Straus and Giroux.[source]
  2. Stanovich, K. E., & West, R. F. (2000). Individual differences in reasoning: Implications for the rationality debate? Behavioral and Brain Sciences, 23(5), 645–65.[source]
  3. Evans, J. St. B. T. (2008). Dual-processing accounts of reasoning, judgment, and social cognition. Annual Review of Psychology, 59, 255–78.[source]

Further Reading