Devised 2 true-false scales to measure anhedonia, the lowered ability to experience pleasure: a 40-item Physical Anhedonia (PA) scale and a 48-item Social Anhedonia (SA) scale. After scale development using 371 college students, the final version was given to 505 normal adults stratified by social class, age (18–45), and sex, and to 123 male schizophrenics. The potential artifacts of social desirability, acquiescence, and random responding were ruled out. Coefficient alpha values for PA and for SA were .74 and .85 for male normal Ss and .82 and .85 for male schizophrenics. Schizophrenics scored more anhedonic than normal Ss on both PA and SA. Schizophrenicsʼ scores on PA fell into 2 clusters of scores, one resembling the total distribution of the normal Ss, and a 2nd cluster consisting of scores that were more anhedonic than those of the normal Ss. Anhedonics were more often poor premorbid and hedonics more often good premorbid. The PA scale may be useful for testing the hypotheses, advanced by several theorists, that anhedonia is genetically transmitted and that nonpsychotic anhedonics are at high risk for schizophrenia. (25 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved)