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Area of Science:

  • Cognitive Psychology
  • Social Psychology

Background:

  • The truth effect describes the tendency to judge familiar statements as more valid.
  • This phenomenon is well-documented but its underlying cognitive mechanisms are debated.

Purpose of the Study:

  • To investigate the plasticity of the truth effect.
  • To examine how contextual factors influence the truth effect.

Main Methods:

  • Two experiments were conducted to test the truth effect.
  • Varied the interval between statement exposure and judgment (10 minutes vs. 1 week).
  • Manipulated the judgment task during initial statement exposure.

Main Results:

  • A truth effect was not observed with a 10-minute interval in a typical judgment design.
  • The truth effect was replicated when the initial judgment task was altered.
  • The truth effect was also replicated with a 1-week interval between repetitions.

Conclusions:

  • The truth effect is not a static phenomenon and is influenced by context.
  • Existing theories do not fully explain these context-dependent findings.
  • A revised fluency attribution hypothesis is proposed to account for the observed plasticity.