Subjects used more extra-dimensional shift solutions in the presence of novel cues than in the presence of familiar cues, except at the highest training level. (MH)

Verbal pretraining aided both single-problem discrimination and learning-set performance, while single-problem mastery manipulations had no significant effect. These results support the theory of acquired distinctiveness of cues. (MH)

In this study of errorless learning a procedure is tested which allows the subject himself to adjust the speed at which a supplementary stimulus aid is withdrawn. A standard match-to-sample apparatus with 1 sample window above and 4 matching (response) windows below was used. Tokens were delivered for correct responses and the correct matching…

These results provide a more precise attentional interpretation of both preference and pretraining effects. (Authors)

Data were interpreted as suggesting that incidental learning may not be cumulative over trials, but rather, may be due to memory of the last trial. (Author)

The prediction was confirmed that young children would experience more difficulty in learning to discriminate faces of another race than those of their own. Additional findings revealed that discrimination-learning performance with racial stimuli is related to a number of factors including developmental level, race of the subject, and race of the…

A sequence of studies compared two types of discrimination formation: errorless learning and trial-and-error procedures. The subjects were three boys and five girls from a university preschool. The children performed the experimental tasks at a typical match-to-sample apparatus with one sample window above and four match (response) windows below.…