Behaviorally anchored rating scales (BARS) are scales used to rate performance. BARS are normally presented vertically with scale points ranging from five to nine. It is an appraisal method that aims to combine the benefits of narratives, critical incidents, and quantified ratings by anchoring a quantified scale with specific narrative examples of good, moderate, and poor performance.[1] BackgroundBARS were developed in response to dissatisfaction with the subjectivity involved in using traditional rating scales such as the graphic rating scale.[2] A review of BARS concluded that the strength of this rating format may lie primarily in the performance dimensions which are gathered rather than the distinction between behavioral and numerical scale anchors.[3] Benefits of BARSBARS are rating scales that add behavioral scale anchors to traditional rating scales (e.g., graphic rating scales). In comparison to other rating scales, BARS are intended to facilitate more accurate ratings of the target person's behavior or performance. However, whereas the BARS is often regarded as a superior performance appraisal method, BARS may still suffer from unreliability, leniency bias and lack of discriminant validity between performance dimensions.[3][4] Developing BARSBARS are developed using data collected through the critical incident technique,[5] or through the use of comprehensive data about the tasks performed by a job incumbent, such as might be collected through a task analysis. In order to construct BARS, several basic steps, outlined below, are followed.
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