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Related Experiment Video

Updated: Jun 21, 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

Evaluating the two-component inspection model in a simplified luggage search task.

Alan W J Wales1, Clare Anderson, Katherine L Jones

  • 1Loughborough University, Loughborough, England. alan.wales@access.uzh.ch

Behavior Research Methods
|July 10, 2009
PubMed
Summary

This study modeled visual inspection using Drury's two-component inspection model (TCM). The TCM accurately reflected training improvements in decision time for both age groups, showing decision-making improved more than search skills.

Related Experiment Videos

Last Updated: Jun 21, 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:

  • Human Factors
  • Cognitive Psychology
  • Applied Psychology

Background:

  • Visual inspection of X-ray luggage images is a critical but time-constrained task.
  • Existing models often fail to concurrently evaluate performance and speed.
  • Training significantly impacts initial visual inspection performance.

Purpose of the Study:

  • To model visual inspection ability during learning using Drury's two-component inspection model (TCM).
  • To concurrently evaluate performance and speed in a luggage search task.
  • To assess the influence of age and training on visual inspection components.

Main Methods:

  • A laboratory experiment with 24 naive participants (12 younger, 12 older).
  • Participants performed a simplified luggage search task.
  • Drury's two-component inspection model (TCM) was applied to analyze decision time and search components.

Main Results:

  • The TCM provided reliable fits, accurately reflecting improvements in decision time with training.
  • Neither the search nor decision components individually showed a significant age effect.
  • The decision component demonstrated greater improvement with training compared to the search component.
  • Stopping-time policy effectively captured age and training-related improvements.

Conclusions:

  • Drury's two-component inspection model (TCM) is effective for analyzing visual inspection performance and speed.
  • The TCM is a valuable supplement to detection theory when performance speed is a key factor.
  • Decision-making processes in visual inspection show significant improvement with training.