IN THIS ARTICLE THE AUTHOR GIVES AN OVERVIEW OF DEVELOPMENTS IN THE FIELD OF PSYCHOLINGUISTICS DURING THE PERIOD FOLLOWING THE PUBLICATION OF VOLUME 34, NUMBER 2 OF "REVIEW OF EDUCATIONAL RESEARCH" IN APRIL 1964. DISCUSSED ARE (1) LEARNING AND NATIVISTIC THEORIES OF LANGUAGE ACQUISITION, (2) EMPIRICAL FINDINGS IN DEVELOPMENTAL PSYCHOLINGUISTICS,…

An analysis of part-of-speech membership was made utilizing certain mechanisms that have been proposed to explain the nature of word classes. It was proposed that words of the same form class constitute "verbal habit families" on the basis of either a common grammatical meaning response, a common affix, or a common label (e.g., "verb"). One…