Abstract
ABSTRACTType/Token Ratios have been extensively used in child language research as an index of lexical diversity. This paper shows that the measure has frequently failed to discriminate between children at widely different stages of language development, and that the ratio may in fact fall as children get older. It is suggested here that such effects are caused by a negative, though non-linear, relationship between sample size (i.e. number of tokens) and Type/Token Ratio. Effects of open and closed class items are considered and an alternative Verbal Diversity measure is examined. Standardization of the number of tokens before computing Type/Token Ratios is recommended.
Publisher
Cambridge University Press (CUP)
Subject
General Psychology,Linguistics and Language,Developmental and Educational Psychology,Experimental and Cognitive Psychology,Language and Linguistics
Reference18 articles.
1. Skehan P. (1986) Early lexical development and the prediction of foreign language learning success. Paper presented at the CILT/ESRC Conference on Second Language Acquisition, Windsor, Berkshire.
2. Richards B. J. (in prep.) Individual differences and the development of the auxiliary verb system in young children.
3. Structure and Strategy in Learning to Talk
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