Abstract
Matched groups of deaf children of deaf parents and hearing children of hearing parents were required to indicate which of two glasses contained more or less water. The deaf comprehended the meaning of the highly iconic sign “LESS” across all ages while comprehension of the noniconic sign “MORE” was a function of age. These data, reflecting a “MORE is LESS” effect, were the reverse of the findings for the hearing given speech. When given sign, the performance of the hearing was similar to that of the deaf except for the absence of an age-related increase in “MORE” accuracy. Analyses of response biases revealed differential preferences for the two groups. Results are discussed in terms of the relative iconicity of the two signs and Clark's Semantic Feature Hypotheses.
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