“…Research comparing multiple sources (Baird, 1977;Basset & Meyer, 1968;Blackburn & Clark, 1975;Borman, 1974;Griffiths, 1975;Holzback, 1978;Ilgen, Peterson, Martin, & Boeschen, 1981;Kavanagh, MacKinney, & Wolins, 1971;Klimosk & London, 1974;Kraut, 1975;Meyer, 1980;Schneier & Beatty, 1978;Thorton, 1980;Wiley & Hahn, 1977;Zammuto et al, 1982) has found (a) disagreement among factor structures for different rating sources, (b) differences in rating strategies, and (c) low discriminant validities for the measurement methods. On the basis of his results, Borman (1974) argued that a "hybrid" rating system shoulid be created in which raters make evaluations on only those dimensions they are in a good position to rate.…”