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Abstract:
Abstract: This study investigated the ability to interrupt an
ongoing response when a stop-signal was presented in either the
auditory or visual modality. Fifty participants performed two
go-stop tasks (Logan, 1994), one auditory and one visual, that
required a choice reaction to a visual go-signal. On 23% of trials,
the go-signal was followed by a stop-signal that indicated a
response should be withheld. In the auditory go-stop task, the
stop-signal was a 900 Hz tone. In the visual go-stop task, the
visual go-signal changed color, indicating that a response should
be withheld. In each task, an equal number of stop-signals were
presented at 75, 150, 225, and 300 ms delays following the onset of
the go-signal. Results indicated that slightly more response
inhibitions were made when the stop-signal was presented in the
auditory modality. Furthermore, the modality of the stop-signal
interacted with the stop-signal delay, with more response
inhibitions made at the two longer delay intervals (225 and 300ms)
in the auditory than in the visual stop-signal condition. These
findings suggest that response inhibition might be improved when
the stop-signal is presented in a modality that differs from that
of the go-signal.
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