Psychometric properties of the Peer Attitudes Toward Children who Stutter (PATCS) scale (Langevin, M., & Hagler, P. (2004). Development of a scale to measure peer attitudes toward children who stutter. In A.K. Bothe (Ed.), Evidence-based treatment of stuttering: empirical bases and clinical applications (pp. 139-171). Mahwah, NJ: Lawrence Erlbaum Associates.) and the extent to which peer attitudes are negative were re-examined. Results show that internal consistency was 0.97 and test-retest reliability was 0.85. In a known groups analysis participants who had contact with someone who stutters had statistically significant higher mean scores (more positive attitudes) than those who had not had contact. Nonsignificant findings for gender and grade call into question the usefulness of these variables as discriminators in future tests of known groups validity of peer attitudes toward children who stutter. Approximately one-fifth of participants had PATCS scores that were somewhat to very negative. These findings support calls for school-based education about stuttering. (Contains 3 tables.)