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Related Experiment Video

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A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
08:12

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

Published on: March 1, 2022

Transformation and alignment in similarity.

Carl J Hodgetts1, Ulrike Hahn, Nick Chater

  • 1School of Psychology, Cardiff University, Tower Building, Park Place, Cardiff CF10 3AT, UK. hodgettscj@cf.ac.uk

Cognition
|September 2, 2009
PubMed
Summary
This summary is machine-generated.

This study compares two models of psychological similarity: structural alignment (SA) and Representational Distortion (RD). Representational Distortion provided a better fit to experimental data, suggesting transformations are key to understanding psychological similarity.

Related Experiment Videos

Last Updated: Jun 20, 2026

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
08:12

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

Published on: March 1, 2022

Area of Science:

  • Cognitive Psychology
  • Psychological Similarity Models

Background:

  • Psychological similarity is often explained by structural alignment (SA) or Representational Distortion (RD).
  • Existing models offer differing perspectives on how similarity is computed.

Purpose of the Study:

  • To contrast structural alignment (SA) and Representational Distortion (RD) as accounts of psychological similarity.
  • To evaluate a "concrete" version of RD using experimental data.
  • To explore the relationship between transformation and alignment processes in perceptual theory.

Main Methods:

  • Defined a coding scheme for psychological transformations to operationalize Representational Distortion (RD).
  • Conducted two experiments to collect data on psychological similarity judgments.
  • Compared the explanatory power of RD and structural alignment (SA) models against the experimental data.

Main Results:

  • The "concrete" version of Representational Distortion (RD) demonstrated a compelling fit with the experimental data.
  • Representational Distortion (RD) performed favorably when compared against the structural alignment (SA) model.
  • The findings suggest that RD may offer a more accurate account of psychological similarity in this context.

Conclusions:

  • Representational Distortion (RD) provides a robust framework for understanding psychological similarity.
  • The study advocates for viewing transformation and alignment as complementary processes in perception, challenging the current dichotomy.
  • Future research should consider the integrated role of transformations and alignment in cognitive models.