Revisiting English word stress and rhythm in the post-nuclear domain

Abstract

In English, grammatical category and word stress are often highly correlated: disyllabic nouns and verbs frequently occur with trochaic and iambic stress, respectively. Kelly and colleagues (1988,1992) suggest that this relationship was shaped by rhythm but may also be subverted by rhythm. We revisit a 1978 production study by Huss, who argued that the usual stress correlation is neutralized in postnuclear position and that acoustic differences are subject to effects of sentence rhythm. Twelve pairs of homophones were embedded in full sentences preceded by a possessive or plural noun with ultimate or penultimate stress: e.g. farms produce, farm’s produce, farmers produce, farmer’s produce. A postnuclear environment was elicited by prepending a contrastive sentence (e.g., Some say that only supermarket produce may vary in quality but also a farmer’s produce may vary in quality.) Results suggest, contra Huss, that prosodic differences between nouns and verbs persist in the postnuclear environment, despite effects of rhythm. In a mixed-effects logistic regression (N = 18), acoustic cues of syllable duration and maximum intensity were significant predictors of part of speech in nuclear and postnuclear position. We also discuss results of a perception experiment in progress using the production stimuli.