The attentional blink is governed by a temporary loss of control.
Identification of the second of two brief targets is impaired at intertarget lags of less than about 500 msec. We compared two accounts of this attentional blink (AB) by manipulating the number of digit distractors--and hence the lag--inserted among three letter targets in a rapid serial visual presentation stream of digit distractors. On the resource-depletion hypothesis, longer lags provide more time for processing the leading target, thus releasing resources for the trailing target. On the temporary-loss-of-control (TLC) hypothesis, intervening distractors disrupt the current attentional set, producing a trailing-target deficit. Identification accuracy for trailing targets was unimpaired not only at lag 1 (conventional lag 1 sparing) but also at later lags, if preceded by another target. The results supported the TLC hypothesis but not the resource-depletion hypothesis. We conclude that the AB is caused by a disruption in attentional set when a distractor is presented while the central executive is busy processing a leading target.
Kawahara
Jun-Ichiro
J
National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Japan. jun.kawahara@aist.go.jp
Kumada
Takatsune
T
Di Lollo
Vincent
V
D000328:Adult; D001288:Attention; D004193:Discrimination Learning; D005260:Female; D006801:Humans; D008297:Male; D010364:Pattern Recognition, Visual; D011930:Reaction Time; D012033:Refractory Period, Psychological