Two attentional deficits in serial target search: The visual attentional blink and an amodal task-switch deficit

Author(s): Chun, M. M., Banks, B. S., Muckenhoupt, M.

Journal/Book: J Exp Psychol Learn Mem Cogn. 1998; 24: 750 First St NE, Washington, DC 20002-4242. Amer Psychological Assoc. 979-992.

Abstract: When monitoring a rapid serial visual presentation at 100 ms per item for 2 targets among distracters, viewers have difficulty reporting the 2nd target (T2) when it appears 200-500 ms after the onset of the Ist letter target (T1): an attentional blink (AB; M. M. Chun & M. C. Potter, 1995b; J. E. Raymond, K. L. Shapiro, & K. M. Arnell, 1992). Does the same deficit occur with auditory search? The authors compared search for auditory, visual, and cross-modal targets in 2 tasks: (a) identifying 2 target letters among digits (Experiments 1-3 and 5) or digits among letters (Experiment 6), and (b) identifying 1 digit among letters and deciding whether an X occurred among the subsequent letters (Experiment 4). In the experiments using the Ist task, the standard AB was found only when both targets were visual. In the 2nd task, with a change in selective set from T1 to T2, a task-switching deficit was obtained regardless of target modality.

Note: Article Potter MC, MIT, Dept Brain & Cognit Sci, 77 Massachusetts Ave, E10-039, Cambridge,MA 02139 USA

Keyword(s): MEMORY; PERFORMANCE

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