A series of voiced CV syllables which varied along the feature of place was used in a selective adaptation paradigm. The end-point stimuli from the test series and their voiceless counterparts were used as adaptors. Subjects used a six-point rating scale to respond to the stimuli, instead of the usual two category identification. The average rating for end-point stimuli from the same category as the adaptor, as well as boundary stimuli, shifted as a function of adaptation. In all cases, the average rating response shifted toward that of the unadapted category. The average rating for end-point stimuli in the opposite category from the adaptor remained relatively unchanged. Results indicate that the entire category of the adapting stimulus changes as a result of selective adaptation and that the effect is not confined to stimuli near the phonetic boundary. These results agree with end-point shifts found recently using a dichotic listening task [J.L. Miller, Percep. Psychophys. (in press)]. Results are interpreted in terms of recent models of the adaptation process. [Research supported by NINCDS Grant NS-12179.]