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Related Experiment Videos

Item characteristics and answer-changing behaviors.

Collin T Ballance1

  • 1Mathematics Department, Aquinas College, 4210 Harding Road, Nashville, TN 37205, USA. ballancec@aquinas-tn.edu

Psychological Reports
|May 6, 2006
PubMed
Summary

Student answer changes on multiple-choice tests did not correlate with item difficulty. However, item discrimination showed a low correlation with score gains from changing answers, contradicting prior research findings.

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Area of Science:

  • Educational Measurement
  • Psychometrics
  • Student Assessment

Background:

  • Understanding factors influencing student performance on multiple-choice tests is crucial for effective assessment design.
  • Previous research indicated item difficulty influences score changes when students revise answers.
  • The relationship between item discrimination and score changes from answer modification requires further investigation.

Purpose of the Study:

  • To investigate the relationship between item difficulty and discrimination indices and score changes resulting from students altering their answers on multiple-choice tests.
  • To compare findings with existing literature on student test-taking behaviors.

Main Methods:

  • Analysis of 113 multiple-choice test items.
  • Comparison of item difficulty and discrimination indices with points gained or lost from students' answer changes.
  • Statistical correlation analysis.

Main Results:

  • Item difficulty was not significantly correlated with score gains from answer changes, aligning with previous studies.
  • Item discrimination exhibited a low correlation with score gains from answer changes, a finding inconsistent with prior research.
  • This suggests that item discrimination may not be a reliable predictor of score changes due to answer modifications.

Conclusions:

  • Item difficulty is not a significant factor in score changes when students revise answers.
  • Item discrimination's low correlation with score gains from answer changes challenges previous assumptions.
  • Further research is needed to explore the nuances of student answer-changing behavior and its impact on test validity.

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