| |
Abstract:
Abstract: Event-related potentials were recorded from 6-year
old children and adults during two tasks designed to assess
response inhibition. The first task, a "Go-NOGO" task, requires the
subject to selectively attend and respond to non-target stimuli
while inhibiting their response to an equally salient target
stimulus. The second task is a working memory task, which also
contains a response inhibition condition. In this task, subjects
must inhibit a response to a "non-target" that was primed by the
previous "target" trial. ERPs were recorded from sixteen scalp
sites. The accuracy (i.e. percent correct) and speed (i.e. average
reaction time) of responding to the control and response inhibition
trials will be compared across children and adults, and correlated
with the elicited ERP components, for each task. It is predicted
that the amplitude of the P300 (related to memory updating) and
N200 (related to attention) will be greater for inhibitory trials
than control trials, and that these components will be maximal over
frontal leads for the inhibitory trials. In addition, it is
expected that larger P300s and N200s will be related to greater
accuracy and that the latency to peak amplitude of these components
will be correlated with reaction time.
|
