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Related Experiment Videos

Examining item difficulty and response time on perceptual ability test items.

Chien-Lin Yang1, Thomas R O'Neill, Gene A Kramer

  • 1American Dental Association, 211 E. Chicago Ave., Chicago, IL 60611, USA. yangc@ada.org

Journal of Applied Measurement
|July 31, 2002
PubMed
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Response time does not affect Perceptual Ability Test (PAT) item calibration. Item difficulty correlates with response time, with harder items requiring more time across all examinee groups.

Area of Science:

  • Psychometrics
  • Educational Measurement

Background:

  • Understanding item calibration stability is crucial for test fairness and score comparability.
  • Response time as a potential covariate in item analysis requires further investigation.

Purpose of the Study:

  • To investigate item calibration stability in relation to response time and item difficulty.
  • To determine if response time influences the measurement properties of the Perceptual Ability Test (PAT).

Main Methods:

  • Analysis of response time and item difficulty data from 389 examinees on six PAT subtests.
  • Examination for Differential Item Functioning (DIF) between fast and slow responders.
  • Correlation analysis between item difficulty and response time.

Main Results:

Related Experiment Videos

  • No Differential Item Functioning (DIF) was detected between response time groups.
  • A significant positive correlation was found between item difficulty and response time.
  • Slow responders took longer on more difficult subtests, indicating varying difficulty levels.

Conclusions:

  • The Perceptual Ability Test (PAT) measures the same underlying construct across different response time groups.
  • PAT scores are equally useful regardless of examinee response speed.
  • Item difficulty and response time are related, with harder items necessitating more time.