Effects of Training and Rating Scales on Rating Errors

Ninety business students were randomly assigned to one of three conditions where they used behavioral observation scales (BOS), behavioral expectation scales (BES), or trait scales in observing people on videotape. Half the individuals received four hours of training to minimize rating errors. Rating errors were reduced significantly regardless of the rating scale that was used. However, behavioral criteria were more resistant to rating errors than trait scales. There was no significant difference between BOS and BES on this dimension. With regard to practicality, BOS were evaluated as significantly better than BES and trait scales. BES and trait scales did not differ significantly on this measure.