The results of experiments previously reported indicated that syllable-initial formant transitions contribute by their duration to the perception of the syllable-final voicing contrast for stop consonants. The present experiment employed synthetic disyllables in an attempt to specify the contribution of the duration of syllable-initial and syllable-final formant transitions to the perception of stress. Results indicated that (1) such transitions do contribute to the durational percepts underlying stress judgments and (2) the extent of this contribution varies with the location of the transitions in the disyllable. [Work supported by NICHD.]