Which performance appraisal problem is this manager hoping to avoid?

Personal bias refers to subjective influences based on the manager's personal feelings or relationships with the employee. While this is a common concern in performance appraisals, the halo effect specifically involves the distortion of evaluations based on a positive or negative overall impression, rather than personal feelings alone.

Central tendency error occurs when a manager rates all employees as average, avoiding extreme ratings. This type of error does not relate to the overall impression impacting specific performance traits but rather reflects a reluctance to differentiate between high and low performers, which is not the focus of the halo effect.

Recency error involves giving disproportionate weight to an employee's most recent performance rather than their overall performance throughout the appraisal period. This error focuses on temporal biases rather than the overarching impression that characterizes the halo effect.