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Implicit association tests: Stimuli validation from participant responses.

Sally A M Hogenboom1,2, Katrin Schulz1, Leendert van Maanen3

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Summary
This summary is machine-generated.

The Implicit Association Test (IAT) validation criteria need revision. Most stimuli lack reliable validity, and validity varies across IATs and stimulus types, necessitating updated guidelines for accurate bias measurement.

Keywords:
implicit association testinternal validitystimulus validation

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Area of Science:

  • Psychology
  • Social Psychology
  • Psychometrics

Background:

  • The Implicit Association Test (IAT) is widely used to measure implicit attitudes and biases.
  • Previous research proposed validation criteria for IAT stimuli based on response times and accuracy.
  • These criteria aim to ensure stimuli are familiar and easily classifiable by participants.

Purpose of the Study:

  • To evaluate the theoretical and practical utility of proposed IAT stimulus validation criteria.
  • To assess the reliability and consistency of stimulus validity across different IATs and stimulus types.
  • To provide recommendations for improving IAT stimulus selection and validation.

Main Methods:

  • Analysis of data from 15 Implicit Association Tests (IATs) from Project Implicit.
  • Application of proposed validation criteria (response time <800ms, error rate <10%) to IAT stimuli.
  • Bootstrap analysis with 10,000 experiments (100 participants each) to assess reliable validity.
  • Exploration of stimulus validity variations across different IATs and stimulus types (images, nouns, names, adjectives).

Main Results:

  • Only 5.85% of stimuli were found to be reliably valid across samples.
  • A significant majority of stimuli (78.44%) could not be reliably validated.
  • Stimulus validity varied considerably across different IATs and contexts.
  • Stimulus type significantly predicted validity, with images showing higher validity but with internal variations.

Conclusions:

  • The proposed IAT stimulus validation criteria demonstrate limited practical utility.
  • Current validation methods result in a high rate of unvalidated stimuli, questioning their reliability.
  • Revised validation criteria and practical recommendations are needed for accurate IAT stimulus selection and post-hoc validation.