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"Reading" a visual scene: The effect of spatially grounded expectations on memory.

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Related Experiment Video

Updated: Nov 24, 2025

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Searching for boundary extension.

Helene Intraub1

  • 1Department of Psychological and Brain Sciences, University of Delaware, Newark, DE 19716, USA.

Current Biology : CB
|December 22, 2020
PubMed
Summary

Boundary extension (BE), a false memory phenomenon, is not an artifact of stimulus selection as claimed. This study refutes the argument that BE is universal and caused by specific stimulus sets.

Area of Science:

  • Cognitive Psychology
  • Memory Research

Background:

  • Bainbridge and Baker (2023) proposed boundary extension (BE) is an artifact of stimulus selection, challenging scene construction theories.
  • They suggested removing BE from textbooks, citing their observation of contraction alongside extension as evidence against universality.

Discussion:

  • The authors critique Bainbridge and Baker's conclusions, stating the link between their data and claims about BE is weak.
  • They argue that BE is not 'universal' and that contraction does not invalidate BE theory.
  • The critique highlights that the stimulus sets used by Bainbridge and Baker were not inherently flawed or 'recycled'.

Key Insights:

  • Boundary extension is a robust memory phenomenon, not solely an artifact of stimulus selection.
  • The universality of BE is supported, and contraction errors do not disprove its existence.

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  • The study challenges the methodology and conclusions of research that dismisses BE based on specific stimulus sets.

    • Outlook:

    • Further research should explore the nuances of scene construction and memory representation.
    • Investigating diverse stimulus sets is crucial for a comprehensive understanding of BE.
    • Revisiting the theoretical underpinnings of BE in light of varied empirical findings is recommended.