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Related Experiment Videos

Two kinds of reasoning.

L J Rips1

  • 1Psychology Department, Northwestern University, 2029 Sheridan Rd., Evanston, IL 60208, USA. rips@northwestern.edu

Psychological Science
|May 9, 2001
PubMed
Summary
This summary is machine-generated.

People evaluate arguments using distinct cognitive processes for deductive correctness and inductive strength, not a single continuum. This research clarifies human reasoning and argument evaluation methods.

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Area of Science:

  • Cognitive Psychology
  • Philosophy of Mind

Background:

  • Human reasoning can be assessed via deductive correctness or inductive strength.
  • Alternative theories propose a single psychological continuum for evaluating arguments.

Purpose of the Study:

  • To test competing theories of argument evaluation.
  • To investigate whether people use distinct or unified cognitive processes for assessing arguments.

Main Methods:

  • Participants evaluated the same arguments for both deductive correctness and inductive strength.
  • Experimental design manipulated instructions to elicit different evaluation types.

Main Results:

  • An interaction was observed between argument type and evaluation instructions.

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  • Participants differentiated between deductive correctness and inductive strength judgments.
  • Conclusions:

    • Findings support the dual-process view of argument evaluation.
    • Human cognitive processes for reasoning are distinct, not monolithic.