Use of norm groups to adjust student ratings of instruction: A warning

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Abstract

D. P. Hoyt et al (1973, 1978) recommend the use of norm groups, controlled for class size and student motivation, to adjust student ratings of instruction and make comparisons among teachers more appropriate. The method that Hoyt employs for generating norm groups relies heavily on the use of volunteer Ss. This study made a student evaluation-of-instruction questionnaire available to 169 teachers over a 2-yr period. 69 instructors volunteered to use the questionnaire. Volunteers were compared with nonvolunteers on a previously collected mandatory student evaluation questionnaire. The hypothesis that volunteer teachers' student ratings were reliably superior to the ratings of nonvolunteer teachers was confirmed. The implications for the generation and use of norm groups are discussed. (23 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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