Duration effects revisited: Labeling of tone analogs to voicing contrasts
Richard E. Pastore, Crystle B. Morris, Robert J. Logan, Jody Kaplan Layer · The Journal of the Acoustical Society of America · 1986
Our previous research described at the last Acoustical Society Meeting [Pastore et al., J. Acoust. Soc. Am. Suppl. 1 77, S27 (1985)] investigated duration effects in the perception of tone analogs to the delayed F1 onset cue for voicelessness. Two groups of psychophysically experienced subjects exhibited statistically significant dependencies on stimulus duration, with longer stimuli resulting in shorter delayed onset boundaries. This pattern of results is opposite to those reported for voicing contrast boundaries as a function of target stimulus duration. The second group of subjects now has replicated this statistically significant reversed duration dependency for equivalent stimuli with added harmonic structure. Naive subjects with the identical task and stimuli exhibit a statistically significant dependency on duration consistent with published findings for synthetic speech, and thus opposite to that found for our experienced subjects. The results are discussed in terms of the role of perceptual learning in the perception of voicing cues. [Research supported, in part, by National Science Foundation grant 8302873.]