Citation

Hiraoka K, Igawa K, Kashiwagi M, Nakahara C, Oshima Y, Takakura Y. Laterality 2018; 23(1): 51-66.

Affiliation

College of Health and Human Sciences , Osaka Prefecture University , Habikino , Japan.

Copyright

(Copyright © 2018, Informa - Taylor and Francis Group)

DOI

10.1080/1357650X.2017.1311906

PMID

28378624

Abstract

The objective of the present study was to investigate whether the stop and go processes of the motor response are asymmetrical and whether the asymmetries are dependent on handedness and the response selection process that is engaged. Both right-handed and left-handed participants abducted either the left or right index finger in response to an imperative cue in the choice reaction time (choice RT) or the simple RT task. A stop cue was presented after the imperative cue with a probability of.25. When the stop cue was presented, the participants withheld the prepared response. On the choice RT task, left-handed participants had significantly shorter RT and stop signal reaction time (SSRT) with the left versus the right hand, whereas right-handers showed no difference between hands on either measure. In the simple RT task, the RT and SSRT were not significantly different between the groups or the response sides. These results indicate that both the stop and go processes of the prepared left-hand response are completed earlier than those of the right-hand response in left-handed individuals when the stimulus-response process involves a response selection process.

Language: en

Keywords

Reaction time; handedness; laterality; response inhibition; stop signal reaction time