EVENT RELATED POTENTIAL (ERP) CORRELATES OF TEMPORAL ORDER JUDGMENT.
Item
-
Title
-
EVENT RELATED POTENTIAL (ERP) CORRELATES OF TEMPORAL ORDER JUDGMENT.
-
Identifier
-
AAI8302504
-
identifier
-
8302504
-
Creator
-
FEUER, LEONARD.
-
Contributor
-
Doreen Berman | Gad Hakerem
-
Date
-
1982
-
Language
-
English
-
Publisher
-
City University of New York.
-
Subject
-
Psychology, Physiological
-
Abstract
-
Auditory temporal order thresholds and event related potential (ERPs) were obtained from groups of normal children (aged 9-12, N = 9) and adults (aged 22-32, N = 10) in response to dichotic click stimuli. Subjects were required to discriminate the temporal sequence of the click pairs i.e., right before left (RL) or left before right (LR). Stimuli were delivered to each ear at 30 dB SL for all subjects, at interstimulus intervals ((DELTA)t's) of 25, 50 and 75 msec (adults) and (DELTA)t's of 75 and 125 msec (children). ERPs in response to a binaural feedback stimulus (0 msec (DELTA)t) to correct stimulus detections were also recorded. Principal components varimax analysis and an ANOVA were used to analyze the ERPs separately for the discrimination and feedback stimuli for the children and adults combined, and for each group separately.;The adults showed a significantly more sensitive temporal order threshold than the children did. No significant asymmetry in sensitivity occurred as a function of stimulus precedence. In the ERP analysis, the children and adults were matched for: (1) behavioral accuracy ((DELTA)t = 50, 75 msec adults, 75, 125 msec children); and (2) stimulus range ((DELTA)t = 25, 75 msec adults, 75, 125 msec children); and (3) stimulus interval ((DELTA)t = 75 msec children and adults). In the behavioral match combined groups analysis for the discrimination stimulus three components were found. Slow Wave was a large positive component with a parietal scalp maximum. It was larger in the children than adults, and it was largest over the right hemisphere (C4 and P4) in the adults, and largest over the left hemisphere (C3 and P3) in the children. P350 was a late phasic positive component with a CZ maximum. P350 was largest over the hemisphere contralateral to the lead stimulus. N100/P450 was a complex biphasic factor that tended to be more negative in the adults than children. The component was more positive in response to the easy (long (DELTA)t) than hard (short (DELTA)t) condition.;For the feedback stimulus, a Slow Wave was also obtained. In addition, a P300 component was largest at CZ, and was larger in the adults than children. For the children, P450 was most positive for the RL stimuli particularly over the right hemisphere; whereas for the adults, P450 was most negative for the RL stimuli with greatest negativity over the right hemisphere. Finally, a negative baseline shift between the discrimination and feedback stimuli was largest at the central electrodes in the children. Results were discussed with regard to component identification.
-
Type
-
dissertation
-
Source
-
PQT Legacy CUNY.xlsx
-
degree
-
Ph.D.
-
Program
-
Psychology
