![]() ![]() A four-way repeated measures analysis of variance (ANOVA) evaluated the effects of modality, digit-span length, response selection, and ear/visual field of presentation. Data Collection and Analysis: A computerized, custom-designed program was used for all data collection and analysis. Study Sample: Thirty adults (12 males, 18 females) ranging in age from 18 to 30 yr with normal hearing sensitivity and normal or corrected-to-normal visual acuity. right) on dichotic and dichoptic digit perception. reproduction), and ear/visual hemifield of presentation (left vs. visual), digit-span length (1–3 pairs), response selection (recognition vs. Research Design: A multivariate assessment of the effects of modality (auditory vs. Purpose: To evaluate methodological issues involved in using matched tasks of dichotic listening and dichoptic viewing in normal adults. ![]() ![]() Herein, we use dichotic listening and dichoptic viewing of visually presented digits for making this comparison. Use of matched tasks in multiple sensory modalities is a logical approach to address this issue. However, with this application, limitations exist and paradigms need to be developed to improve specificity of the diagnosis. Test procedures using dichotic digits have also been used to assess for disorders of auditory processing. Background: Verbally based dichotic-listening experiments and reproduction-mediated response-selection strategies have been used for over four decades to study perceptual/cognitive aspects of auditory information processing and make inferences about hemispheric asymmetries and language lateralization in the brain. ![]()
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