The effects of lateralized stimuli in a dual-task paradigm: Implications for multiple resource theory.
Item
-
Title
-
The effects of lateralized stimuli in a dual-task paradigm: Implications for multiple resource theory.
-
Identifier
-
AAI9207126
-
identifier
-
9207126
-
Creator
-
Spielman, Steven Barry.
-
Contributor
-
Adviser: Wilma Winnick
-
Date
-
1991
-
Language
-
English
-
Publisher
-
City University of New York.
-
Subject
-
Psychology, Experimental | Psychology, Psychobiology
-
Abstract
-
Two experiments were conducted to evaluate a special case of multiple resource theory which proposes that the left and right hemispheres possess separate processing resources. Additionally, the factors most influential to the development of interference and facilitation effects under a combined tachistoscopic and dichotic dual-task were assessed. In Experiment 1 eight dextral subjects, four men and four women responded manually to unilateral tachistoscopic verbal (semantic and phonetic stimuli) and non-verbal (facial stimuli) presentations. A right visual field advantage was found for both semantic and phonetic stimuli while facial stimuli failed to demonstrate significant visual field differences. The visual accuracy scores obtained in Experiment 1 served as a baseline for comparison with the visual accuracy scores obtained under the tachistoscopic and dichotic dual-task in Experiment 2. Eighteen dextral subjects, nine men and nine women, were tested under the 36 different dual-task experimental conditions and 2 baseline conditions of Experiment 2. Ear of presentation (left ear, right ear), visual field of unilateral visual presentation (left visual field, right visual field), type of visual stimuli (phonetic, semantic, facial), and location of the visual presentation in the one second interstimulus interval between the dichotic pair and binaural probe (0 ms, 460 ms, or 920 ms following the dichotic pair) were all systematically varied. The results indicate that: 1. As the processing requirements for the auditory and visual tasks became more dissimilar, processing interference declined; 2. Under very specific circumstances (i.e. facial visual presentations during LE auditory trials) performance during a dual-task may be enhanced above its single-task level; and 3. There appears to be some support for the premise that multiple processing resources and mechanisms are in operation and that those separate systems may reside in the left and right hemispheres.
-
Type
-
dissertation
-
Source
-
PQT Legacy CUNY.xlsx
-
degree
-
Ph.D.
