As part of a constructive replication of research by Duarte et al. (1993, 1994), objective performance measures, supervisor ratings, duration of employment, and leader-member exchange (LMX) scores were analyzed for 45 bank tellers and 12 bank branch managers. Hierarchical regression tests of LMX as a moderator of the relationship between objective performance measures and supervisor ratings failed to replicate the previously reported interaction among these variables. Further tests of LMX as a mediator of the relationship between objective performance measures and supervisor ratings also failed to support a hypothesized role for LMX in the appraisal process. Additionally, regression analyses did not reaffirm a prior report of short-run and long-run employment duration interacting with LMX in influencing the relationship between objective performance measures and supervisor ratings. Instead, increases in employment duration were found to be associated with more favorable supervisor ratings and superior objective performance. The need for additional replications and construct refinement is highlighted.