The influence of the inter-trial interval on the Humphreys' 'random reinforcement' effect during the extinction of a verbal response.

A test of a statistical learning theory model for two-choice behavior with double stimulus events.

“…2, a weak effect of trial rate was found with the more extreme light frequencies of 90% vs. 50%, while a pronounced rate effect was obtained for the less extreme frequencies of 75% vs. 50%. This is consistent with the results of earlier work (7,10), in which no rate effects were found for 100% vs. 0%, and suggests that rate effects begin to appear as the situation is made more complicated.…”

Two tests of the Sheffield hypothesis concerning resistance to extinction, partial reinforcement, and distribution of practice.

“…Several variations of the Sheffield experiment have been performed using different response systems or different time intervals (3,4,11). In each case, the partial reinforcement groups were more resistant to extinction than the continuous ones.…”

A test of a model for multiple-choice behavior.

“…This paper is concerned with experiments in which Ss are required to predict on each of t trials which event of n possible events will occur; it deals specifically with experiments in which the stimulus that initiates a prediction contains no clue as to which event will occur (3,8,9,10,11,12). A mathematical model, outlined below, has been constructed to describe behavior in repetitive multiple-choice situations of' this sort.…”