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The effect of instructor variance on students' grades

K D Mescher, P E Kerber

    Journal of Dental Education
    |February 1, 1982
    PubMed
    Summary

    Instructor scoring variance in clinical evaluations minimally impacts student grades. While some score fluctuations occurred, faculty differences did not unduly influence final student performance assessments, ensuring reliable grading.

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    Area of Science:

    • Medical Education
    • Educational Assessment
    • Student Performance Evaluation

    Background:

    • Student academic performance in clinical courses relies on accurate faculty evaluations.
    • Variability in instructor scoring can potentially skew students' final grades.
    • Ensuring the reliability of clinical evaluations is crucial for fair student assessment.

    Purpose of the Study:

    • To investigate the impact of instructor variance on student scores in clinical evaluations.
    • To determine the extent to which differences among faculty evaluators affect final student grades.
    • To assess the overall reliability of clinical course grading systems.

    Main Methods:

    • Statistical analysis of student scores and faculty evaluation data.
    • Quantification of variance attributable to individual instructors versus student performance.
    • Comparative analysis of student grades with and without specific instructor scores.

    Main Results:

    • Instructor variance accounted for 11% of the total variance in student final scores.
    • The majority of score differences were attributed to actual student performance.
    • Excluding scores from individual instructors could alter grades for over half of the students, but net changes were typically small (less than one standard deviation).

    Conclusions:

    • Student grades in clinical courses are generally reliable.
    • Individual differences among faculty evaluators do not significantly or unduly affect students' final scores.
    • The current evaluation system provides a dependable measure of student performance.

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