Students’ Evaluation of Teaching: Concerns of Item Diagnosticity

Author:

Madden Thomas J.1,Dillon William R.2,Leak Roland L.3

Affiliation:

1. University of South Carolina, Columbia, SC, USA,

2. Southern Methodist University, Dallas, TX, USA

3. North Carolina Agricultural and Technical State University, Greensboro, NC, USA

Abstract

The validity and reliability of students’ evaluation of teaching effectiveness has been debated since the 1970s. One concern is the extent to which the ratings are influenced by halo, and if so, how does halo affect the interpretation of the ratings? This study seeks to assess the degree to which the halo affects the diagnosticity of individual teaching evaluation items. Statistical methods are used to identify and purge the individual item ratings of halo. Three professors are compared using the observed teaching evaluation scores and the observed scores once the halo has been purged. Results indicate that the halo is present in the scores and that the halo does bias the interpretation of teaching effectiveness, especially when the goal is to compare one professor with another.

Publisher

SAGE Publications

Subject

Marketing,Education

Reference32 articles.

1. Implementation Problems in Meta-Analysis

2. Validity of student ratings of instruction: What we know and what we do not.

3. Effects of instructions to avoid halo error on reliability and validity of performance evaluation ratings.

4. Consistency of rating accuracy and rating errors in the judgment of human performance

5. Boyce, A.C. ( 1915). Method for measuring teachers’ efficiency. In Fourteenth yearbook, Part II of the National Society for the Study of Education (pp. 9-83). Bloomington, IL: Public School Publishing.

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