This paper aims to reduce the job performance self-assessment scale as well as control the response bias and acquiescence bias using vi-gnettes anchors and inverted items. The original scale database was com-posed of 20 items divided into two factors: task and context. For the re-duction, the ten items with higher factor loads and thresholds were chosen. The reduced scale was estimated by a general factor and two specific di-mensions: task and context, representing a bifactor model, with adequate adjustment indicators (RMSEA = .05; TLI = .98). To control response bi-as and acquiescence, a second study was carried out, in which the re-sponses were recoded and factor analyses were performed in order to make a comparison of the results with and without the use of the vignettes and inverted items. The results indicated that the vignettes improved the factorial loads; however, the reversed items did not perform better than the vignettes.
Job performance; Self-evaluation of performance; Response bias.