Influence of test parameter combinations on the auditory evoked late response.

The late auditory evoked potential has been shown to be influenced by lesions located within the frontal or temporal-parietal cortex. The present study was conducted to determine which combination of test parameters produced the most reliable late responses in neurologically normal patients as a preliminary to clinical application. The results of this study revealed a combination of test parameters which demonstrated minimal across-subject and between-test session variance. This combination of test parameters was subsequently recommended for clinical use.

Intra- and intermodal discrimination transfer in auditory and visual discrimination training.

The purpose of this study was to investigate intra- and intermodal discrimination generalization-transfer in auditory and visual "same-different" discrimination training. Two subjects were trained in an auditory discrimination task, two in a visual discrimination task and two received no training. Discrimination performance was assessed on 12 visual and 12 auditory stimulus conditions at pre- and posttraining intervals for all subjects. The 4 subjects receiving training also were probed for performance at three intervals during the training. Results indicate that subjects trained to a task in one sensory modality demonstrate improved discrimination performance on untrained stimulus discrimination within (intra-) and between (inter-) sensory modalities, whereas, untrained subjects tended to show less improved performance.