Accession Number : AD0657933

Title :   ONE-TRIAL LEARNING WITH CONTROL OF ITEM DIFFICULTY,

Corporate Author : WASHINGTON UNIV SEATTLE PSYCHOPHYSICS LAB

Personal Author(s) : Pizzuro,Salvatore A. ; van Laer,John

Report Date : 15 JUL 1967

Pagination or Media Count : 20

Abstract : Ratings of difficulty were obtained for each of 2500 letter-number pairs. The ratings were used to construct three pools of items: Homogeneous Easy, Homogeneous Difficult, and Heterogeneous. Rock's (1957) experiment was repeated thrice, once with each pool of rated items. Each replication used 30 Ss. The manipulation of rated item-difficulty permitted a direct attack on the widely discussed problem of item-selection in Rock's procedure. Notwithstanding the control of item-selection, the performance of Ss in the drop-out condition did not differ significantly from the performance of Ss that learned in the ordinary way, with repetition. The geometric distribution provided a good fit to the obtained distributions of waiting times to the first correct response to an item. This finding accords nicely with an all-or-none view on associative learning.

Descriptors :   (*LEARNING, PREDICTIONS), PERFORMANCE(HUMAN), STATISTICAL TESTS, PROBABILITY, SELECTION, TRAINING, STUDENTS, CONTROL, REACTION(PSYCHOLOGY), PSYCHOPHYSICS

Subject Categories : Psychology

Distribution Statement : APPROVED FOR PUBLIC RELEASE