Sequential response effects in the white rat during conditioning and extinction on a DRL schedule,

Sequential IRT data were obtained for three rats on a DRL 60-sec reinforcement schedule. It was found that first-order sequential dependencies exist under this schedule, including the partial dependence of the length of any given IRT on the length of the preceding IRT. The sequential analysis also served to extend the finding in the literature, based on frequency distributions, that the likelihood of a reinforced IRT is greater after a reinforced IRT than a non-reinforced IRT. Rapid extinction and reconditioning were obtained.     

ON THE VALIDITY OF THE RORSCHACH TEST

Rorschach protocols of 20 persons (normals, depressives, and schizophrenics) were analysed, using the inverted, or Q , method of factoring. Three factors emerged from the analysis and corresponded to the three psychiatric categories. Groups of items, allegedly measuring the isolated factors, were applied to a second population of 42 persons resulting in validity values of an encouraging magnitude. Finally, published protocols are cited, together with a list of discriminating items and a score matrix based on such items, so that further verification can be made by the reader.