Aspects of the Syntax of Behavior: Syllable Structure and Speech Rate

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Abstract
This paper shows that maximal rate of speech varies as a function of syllable structure. For example, CCV syllables such as [sku] and CVC syllables such as [kus] are produced faster than VCC syllables such as [usk] when subjects repeat these syllables as fast as possible. Spectrographic analyses indicated that this difference in syllable duration was not confined to any one portion of the syllables: the vowel, the consonants and even the interval between syllable repetitions was longer for VCC syllables than for CVC and CCV syllables. These and other findings could not be explained in terms of word frequency, transition frequency of adjacent phonemes, or coarticulation between segments. Moreover, number of phonemes was a poor predictor of maximal rate for a wide variety of syllable structures, since VCC structures such as [ulk] were produced slower than phonemically longer CCCV structures such as [sklu], and V structures such as [a] were produced no faster than phonemically longer CV structures such as [ga]. These findings could not be explained by traditional models of speech production or articulatory difficulty but supported a complexity metric derived from a recently proposed theory of the serial production of syllables. This theory was also shown to be consistent with the special status of CV syllables suggested by Jakobson as well as certain aspects of speech errors, tongue-twisters and word games such as Double Dutch.

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