Article raises questions about the value of psycholinguistics as a field of study and goes so far as to claim it "nonsense." With references.
Info. Tech. Dept. of the Central Laboratory of the Research Councils provides a collection of linguistic data and a word association thesaurus.
Research by Michael A. Stokes looks at the human mind's classification of different vowel sounds. Find his data, conclusions and applications.
Group at Michigan State University examines these two areas and the relationship between them. Find current research, or read recent articles.