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Related Experiment Videos

How good is my test?

D W Chambers1

  • 1Department of Community Dentistry, School of Dentistry, University of the Pacific, San Francisco, CA 94115.

Journal of Dental Education
|August 1, 1988
PubMed
Summary
This summary is machine-generated.

Instructors need to evaluate test quality using test theory principles. This guide covers validity, reliability, and measurement error to improve grading accuracy and assessment quality.

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Area of Science:

  • Educational Measurement
  • Psychometrics
  • Assessment Quality

Background:

  • Accurate grading relies on high-quality assessments.
  • Instructors require tools to evaluate examination and laboratory rating data.
  • Foundational test theory provides a framework for appraisal.

Purpose of the Study:

  • To review basic concepts of test theory for instructors.
  • To discuss types of validity and reliability in educational testing.
  • To offer practical methods for assessing test quality and potential grading errors.

Main Methods:

  • Review of fundamental test theory concepts.
  • Discussion of four types of validity.
  • Presentation of reliability coefficients and their interpretation limitations.

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  • Demonstration of the standard error of measurement.

    • Main Results:

    • Understanding validity and reliability is crucial for appraisal.
    • Various reliability coefficients offer insights but have interpretation limits.
    • The standard error of measurement can estimate misgrading likelihood.

    Conclusions:

    • Instructors can appraise assessment quality using test theory.
    • Knowledge of validity and reliability enhances grading decisions.
    • Standard error of measurement aids in identifying potential grading inaccuracies.