PHONOLOGICAL AND LEXICAL INFLUENCES ON VOCABULARY DEVELOPMENT: PREDICTING THE AGES AT WHICH INDIVIDUAL WORDS ARE ACQUIRED
Previous research has shown the following phonological and lexical characteristics of words to be important for word learning: word length, phonotactic probability, word frequency, and neighborhood density. Storkel (2004) analyzed the influence of word length, word frequency, and neighborhood density on the age of acquisition (AOA) of words of young children. Neighborhood density and word frequency were found to be significant contributors to AOA. This study extends Storkel’s work by including phonotactic probability in the analysis, developing predictive models, and assessing the accuracy of the models. Words from the normative database of the MacArthur-Bates CDI were analyzed for each characteristic. Two linear regressions identified separate models for predicting AOA, each with only one significant contributor (word length and neighborhood density, respectively). Both models were highly accurate at predicting the AOA of individual words, with neither being more precise than the other. These results fit within prior work that has shown word length and neighborhood density to be important for word learning early on, and phonotactic probability as growing in importance with age.
School:Bowling Green State University
School Location:USA - Ohio
Source Type:Master's Thesis
Keywords:word learning expressive vocabulary language acquisition
Date of Publication:01/01/2006