Describes the development of the Adaptive/Maladaptive Perfectionism Scale (AMPS) for children. Expert reviewers and samples of 4th- and 5th-grade students were used to develop items and evaluate the internal structure and reliability of scores for the resulting instrument. Results supported 4 dimensions of perfectionism that could be reliably assessed: Sensitivity to Mistakes, Contingent Self-Esteem, Compulsiveness, and Need for Admiration. (Contains 41 references and 2 tables.) (GCP)