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Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
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No imagination effect on boundary extension.

Margaret P Munger1, Kristi S Multhaup2

  • 1Department of Psychology, Davidson College, Davidson, NC, 28035, USA. mamunger@davidson.edu.

Memory & Cognition
|August 8, 2015
PubMed
Summary
This summary is machine-generated.

Boundary extension (BE), a memory error, was not affected by imagining details beyond a scene. This suggests spatial, not visual, imagery may influence this common perception misremembering.

Keywords:
Boundary extensionSource memorySpatial imagery

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Area of Science:

  • Cognitive Psychology
  • Visual Perception
  • Memory Studies

Background:

  • Boundary extension (BE) is a phenomenon where individuals falsely recall perceiving beyond the boundaries of a presented visual scene.
  • Current theories suggest BE arises from source memory errors, where self-generated information is mistakenly attributed to the original stimulus.

Purpose of the Study:

  • To investigate whether explicit imagination of scene details influences the occurrence and magnitude of boundary extension (BE).
  • To determine if elaborating on visual scenes with imagined sensory details or contextual information increases BE.

Main Methods:

  • Six experiments were conducted with undergraduate participants (N = 290).
  • Participants completed boundary extension (BE) tasks under standard or explicit elaboration conditions.
  • Elaboration involved imagining sensory details (smells, sounds) or contextual visual information (off-scene elements, photographic perspectives).

Main Results:

  • Robust boundary extension (BE) effects were observed across all experimental conditions.
  • Explicit elaboration strategies did not significantly alter the magnitude of boundary extension (BE).
  • Findings indicate that boundary extension may be more closely linked to spatial imagery ability than visual imagery.

Conclusions:

  • Explicit imagination of scene details does not appear to modulate boundary extension (BE).
  • The results challenge the notion that source memory errors related to self-generated visual content are the primary driver of BE.
  • Boundary extension may be better explained by spatial processing or imagery abilities rather than visual elaboration.