FORM AND NUMBER PROCESSING OF DOT PATTERNS IN THE DIVIDED VISUAL FIELDS: DIFFERENTIAL EFFECTS ON RESPONSE LATENCY, ACCURACY, AND CONFIDENCE RATINGS.
Item
-
Title
-
FORM AND NUMBER PROCESSING OF DOT PATTERNS IN THE DIVIDED VISUAL FIELDS: DIFFERENTIAL EFFECTS ON RESPONSE LATENCY, ACCURACY, AND CONFIDENCE RATINGS.
-
Identifier
-
AAI8508718
-
identifier
-
8508718
-
Creator
-
MIKITISH, MICHAEL JUDE.
-
Contributor
-
Mitchell L. Kietzman
-
Date
-
1985
-
Language
-
English
-
Publisher
-
City University of New York.
-
Subject
-
Psychology, Psychobiology
-
Abstract
-
Visual processing was studied in a same-different discrimination task that used identical stimuli to test the effects of three distinct procedural tasks: (1) discrimination based on the number of dots (blocked); (2) discrimination based on the form produced by the dots (blocked); and (3) discrimination based on either the number or the form of the dots (mixed). The stimuli were dot patterns consisting of 4, 5, or 6 dots. The dots were arranged to form one of four geometric figures and were tachistoscopically presented randomly and sequentially in pairs. The first pattern of the pair was presented to the central visual field and the second pattern to either the right or left visual field. The subject manually responded same or different to the pair of stimuli based on the number of dots and/or the geometric dot form. The subjects also indicated verbally the number and/or form of the dots in the second pattern. Dependent variables were manual accuracy and latency, verbal report accuracy, and confidence ratings.;The results showed that form processing was faster and more accurate than number processing in both the blocked and mixed presentations. However, the differences between number and form processing were found to depend upon the number of dots in the second pattern of a pair. Significant differences were only obtained when the number of dots in the second pattern was five or six. In addition, the results demonstrated that hemispheric differences in visual processing depend not only on the stimulus characteristics but also on the task demands given to the subject. For example, in the blocked number and the mixed form and number tasks, a shift in visual field advantage from left to right for both manual and verbal accuracy was found as the number of dots in the second pattern increased from four to six. On the other hand, in the blocked form task, a shift in visual field advantage from right to left was noted as the number of dots in the second pattern increased from four to six. Of the dependent variables tested, verbal report accuracy was the one that was most sensitive to hemispheric differences.
-
Type
-
dissertation
-
Source
-
PQT Legacy CUNY.xlsx
-
degree
-
Ph.D.
-
Program
-
Psychology
