... understanding of generalizable changes of performance over time, this paper examines the nature of the relationship between performance and time over the span of employees’ careers. Time and ... always the case, and in two studies the mean experience of the sample was greater than the mean organizational tenure of the sample. As the intent of this study was to examine the relationships ... three from studies of police officers, and two from studies of military trainees. In the subset of studies reporting the mean ages of the samples (S = 98, K = 145, N = 80,275), the weighted mean...