Trey Hedden and John D. E. Gabrieli are at the McGovern Institute for Brain Research, Massachusetts Institute of Technology, Building 46-3160, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA. hedden@mit.edu or gabrieli@mit.edu
Lapses in attention can impair performance independent of the task. A new imaging study reports that reduced activity in prefrontal attentional control regions at the beginning of a trial predicts longer reaction times.
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