money to identify ways job performance can be measured better.
Errors in Observation (Attention)
oGenerally, researchers have varied three types of input information to see
what raters pay attention to when they are collecting information for
performance appraisals.
oFirst, it appears that raters are influenced by general appearance
characteristics of the ratees. Males are rated higher than females (other
things being equal).
oRace also matters in performance ratings. Both in layoff decisions and in
performance ratings, blacks are more likely to do worse than whites.
oResearchers also look at change in performance over time to see if this
influences performance ratings. Both the pattern of performance
(performance gets better versus worse over time) and the variability of
performance (consistent versus erratic) influence performance ratings,
even when the overall level (average) of performance is controlled.
oWorkers who start out high in performance and then get worse are rated
lower than workers who remain consistently low. Not surprisingly,
workers whose performance improves over time are seen as more
motivated, while those who are more variable in their performance are
tagged as lower in motivation.
Errors in Storage and Recall
oResearch suggests that raters store information in the form of traits. More
importantly, they tend to recall information in the form of trait categories.
oFor example, a rater observes a specific behavior such as an employee
resting during work hours. The rater stores this information not as the
specific behavior but rather in the form of a trait, such as “That worker is
lazy.”
oThe entire rating process may be heavily influenced by the trait categories
that the rater adopts, regardless of their accuracy.
oErrors in storage and recall also appear to arise from memory decay. At
least one study indicates that rating accuracy is a function of the delay
between performance and subsequent rating.
Errors in the Actual Evaluation
oThe context of the actual evaluation process also can influence
evaluations. Several researchers indicate that the purpose of an evaluation
affects the rating process.
oFor example, performance appraisals sometimes serve a political end.
Supervisors have been known to deflate performance to send a signal to an
employee—“You’re not wanted here.”
oSupervisors also tend to weigh negative attributes more heavily than