Memory for isolated vowels and for vowels in a consonantal context: An individual differences scaling comparison

We have previously reported that an individual differences scaling comparison of the perception of isolated vowels and the perception of vowels in a consonantal environment (/dVd/) indicated the following: vowels are processed in a more linguistically appropriate way when they occur in consonantal context [B. Rakerd and R. R. Verbrugge, J. Acoust, Soc. Am. Suppl. 1 71, S76 (1982)]. In the present investigation, the method of that earlier experiment was extended to a study of vowel memory. Subjects were asked to make similarity judgments about their memories of (a) isolated vowels, or (b) vowels in /dVd/ consonantal context, and the resulting similarities matrices were submitted to nonmetric individual differences scaling. The scaling analysis indicated (1) that vowel memory, like vowel perception, is to a measurable degree organized around the features of advancement, height, and tenseness; and (2) that the previously reported perceptual influence of consonantal context is largely to be explained in terms of the stimulation that was presented to perceivers, rather than in terms of any sort of knowledge that perceivers brought to bear in perceptual processing. [Research supported by NIH grants HD01994 and RR05596.]