[Orientation of attention in the visual space].
The display was composed of four boxes, horizontally aligned above the fixation point. In Experiment I, each box was cued by a digit shown at fixation. In Experiment II there were only two numeric cues, signalling the inner or the outer boxes, depending on the experimental condition. The subject was instructed to orient attention to the cued box, and to respond to the imperative stimulus as fast as possible, wherever it appeared. By using four time interval (SOAs), we tried to determine the route covered by attention movements. In Experiment I, with the shortest SOA (100 msec), it was shown that attention does not reach the cued box through a direct path. Rather it moves first on the inner boxes, thereafter focusing on the cued location. The same results were obtained in Experiment II, where the cue directed attention to the inner boxes. When the external boxes were cued, however, this trend was not observed.
Barbieri
C
C
Istituto di Fisiologia Umana, Università di Parma.
Mucignat
C
C
Riggio
L
L
Umiltà
C
C
Rizzolatti
G
G
D000328:Adult; D001288:Attention / Q000502:physiology*; D006801:Humans; D008297:Male; D008838:Microcomputers; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology; D012016:Reference Values; D012438:Saccades / Q000502:physiology; D013037:Spatial Behavior
Aspetti dell'orientamento dell'attenzione nello spazio visivo.