Materials are presented which were developed for use in studies of verbal concept formation. The frequency of response tendencies by 153 elementary psychology students to 213 stimulus words (nouns) was determined. The responses were grouped into 40 categories. The elicitation by two or more words of the same responses indicates that the stimulus words can form the basis for concept formation tasks. The associations obtained were restricted since S was allowed to respond only in terms of sense impressions. The percentage of frequency of responses to each stimulus word is presented along with its category designations, percentages of miscellaneous responses are provided, and for each stimulus word is shown the Thorndike-Lorge frequency count per million words.