Pitch contour shape matters in memory

Amelia Kimball, Jennifer Cole

The Autosegmental-metrical model of prosody (Pierrehumbert 1980,Ladd 2008) holds that pitch melodies can be modeled with level low and high tones; information about the shape of the pitch contour is not part of the phonological representation. Yet recent results (Barnes et al. 2012, Cangemi 2014) show that contour shape affects the perception of tone height and timing. A pitch plateau that maintains a level pitch at its peak will be perceived as higher and/or having a later accent than a sharp peak of the same height. In this study we ask whether contour shape is encoded in the mental representation of pitch accent by testing memory for the H* pitch accent of American English, realized as a peak or plateau. We establish that, as predicted by recent research, pitch shape affects perception. Then we test these same distinctions in a memory task. Our findings show that pitch plateaux are better discriminated than peaks, and that this advantage grows larger when memory load is higher. We argue that this shows contour shape matters, not just psychoacoustically in immediate perception, but also in memory, and that shape may therefore be posited to be included in the phonological representation of pitch accent.

DOI: 10.21437/SpeechProsody.2016-241

Cite as

Kimball, A., Cole, J. (2016) Pitch contour shape matters in memory. Proc. Speech Prosody 2016, 1171-1175.

author={Amelia Kimball and Jennifer Cole},
title={Pitch contour shape matters in memory},
booktitle={Speech Prosody 2016},