“…However, numerous studies concerning faculty evaluations have suggested a number of sources of error that affect the validity of student ratings (e.g., Battle and Fabick, 1975;Barnoski and Scokloff, 1976;Bassin, 1974;Morgan and Ogden, in press). Variables such as the expected course grades, the time of day classes are taught, class size, math orientation of the course, whether the course is elective or required, the number of courses taken, the number of written assignments, student rank, and differences in sex between professor and students account for a significant variance in faculty ratings (e.g., Bassin, 1974;Bridges, Ware, Brown, and Greenwood, 1971;Crittenden, Noor, and LeBailly, 1975;Follman, 1975;Frey, Leonard, and Beatty, 1975;Gadzella, 1968;Gage, 1961;Haslett, 1976;Hocking, 1976;Houston, Crosswhite, and King, 1974;Kohlan, 1975;Lovell and Haner, 1955;Rayder, 1968;Rodin and Rodin, 1972;Sheehan, 1975;Sullivan and Skanes, 1974;Wilson and Doyle, 1977;Wood, Linsky, and Strauss, 1974). Moreover, psychometric errors such as leniency effect, central tendency, halo effect, and interrater unreliability that typify most kinds of subjective criteria also beset student rating systems (Bernardin, Alvares, and Cranny, 1976;Burnaska and Hollman, 1974;Eder, Keaveny, McGann, and Beatty, 1978;Keaveny and McGann, 1975).…”