Article

Interhemispheric transmission time in an auditory two-choice reaction task.

National Institute of Occupational Health, Oslo, Norway.
Scandanavian Journal of Psychology (impact factor: 1.52). 07/1993; 34(2):174-82. pp.174-82
Source: PubMed

ABSTRACT An unimanual auditory choice reaction task was performed by 16 right-handed male subjects. Upon release of a central ready button subjects pressed a target button on their right or left side depending on the ear in which they heard a tone. A significant 'Ear' x 'Hand' interaction effect appeared on both reaction time (RT) and the first component of movement (MT1), showing that uncrossed conditions give rise to faster responses than crossed conditions. Interhemispheric transmission time (IHTT) was estimated from the difference of response latency in the two types of conditions. No asymmetry in the speed of information transfer between the hemispheres was found. IHTT was 16 ms in the case of RT, which supported previous research with visual reaction tasks, and IHTT for MT1 was 13 ms, which has not been reported before.

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Keywords

16 right-handed male subjects
 
central ready button subjects
 
IHTT
 
reaction time
 
response latency
 
RT
 
significant 'Ear' x 'Hand' interaction effect
 
supported previous research
 
target button
 
unimanual auditory choice reaction task
 
visual reaction tasks