In recent years, operant discrimination training procedures have been used to teach giant African pouched rats to detect tuberculosis (TB) in human sputum samples. This article summarizes how the rats are trained and used operationally, as well as their performance in studies published to date. Available data suggest that pouched rats, which can…

The ability to report the temporal order of 2 tactile stimuli (1 applied to each hand) has been shown to decline when the arms are crossed over compared with when they are uncrossed. However, these effects have only been measured when temporal order was reported by stimulus location. It is unknown whether this spatial manipulation of the body…

The ability of M. Levine's subset-sampling assumptions to account for the decrease in response latency following the trial of the last error was investigated by employing a distributed stimulus set composed of four binary dimensions and a procedure which required Ss to make an overt response in order to sample each dimension. (Author)

Information theory was used to qualify the difficulty of verbal discrimination (VD) learning tasks and to measure VD performance. Words for VD items were selected with high background frequency and equal a priori probabilities of being selected as a first response. Three VD lists containing only 2-, 3-, or 4-word items were created and equated for…

One of the concerns of the present study was to determine the effects of Right and Wrong items under conditions that do not reduce the opportunity to rehearse the Right items in practice. (Author/RK)

The age effect in this study was such that younger children required proportionately more experience with reward than nonreward before they were able to improve their performance on reward problems over six sessions. (Author)

Purpose of this experiment was to explore the effects of pre- and postshift stimulus similarity, type of shift, and difficulty of discrimination in the standard solution shift - concept identification paradigm. (Authors/CB)

Infants of 6 months and older can be said to have discriminated between different orientations of the same form. (Author)

A child's history of reinforcement is regarded as setting a standard that determines what current rates of reinforcement will be deprivational or satiational for him. (Author)

Major finding was that punishment presented in the same sensory modality as the reinforcement was superior to punishment presented in a different sensory modality from the reinforcement. (Author)

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)

Results of these experiments are evaluated in conjunction with the hypothesis that frequency information is a dominant attribute in recognition decisions. (Author/MB)

Study found that stimulus presence during a delay of reinforcement interval enhanced performance, and to a large extent prevented the usual delay-produced decrement. (Authors)

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…