TY - JOUR AB - Most models of visuospatial attention include the notion that attention is dedicated to a single location in space. However, several researchers have found evidence that under appropriate circumstances, attention may be allocated to noncontiguous locations (e.g., Awn & Pashler, 2000; Bichot, Cave, & Pashler, 1999; Kramer & Hahn, 1995). In the present experiments, the spatial distribution of attention was assessed by a novel method, perceptual latency priming: the latency benefit of an attended visual stimulus, as compared with a nonattended stimulus. Experiment 1 assessed whether observers are able to attend to two nonadjacent regions or a region of variable size. Experiment 2 tested whether, when two distant locations are attended to, the region between them is necessarily also in the focus of attention. Two further experiments controlled for objections against the method used and replicated the main results of the first two experiments. The experiments showed a robust attentional pr AU - Scharlau, Ingrid ID - 6069 IS - 6 JF - Perception & Psychophysics KW - visuospatial attention KW - priming paradigm KW - spatial distribution KW - Adult KW - Attention KW - Female KW - Humans KW - Male KW - Attention KW - Priming KW - Spatial Perception KW - Visuospatial Ability SN - 0031-5117 TI - Evidence for split foci of attention in a priming paradigm. VL - 66 ER - TY - JOUR AB - Presenting a masked prime leading a target influences the perceived onset of the masking target. This priming effect is explained by the asynchronous updating model: The prime initiates attentional allocation toward its location, which renders a trailing target at the same place consciously available earlier. In 3 experiments, this perceptual latency priming by leading primes was examined jointly with the effects of trailing primes in order to compare the explanation of the asynchronous updating model with the onset-averaging and the P-center hypotheses. Exp 1 (n=15, mean age 27.1 yrs) showed that an attended, as well as an unattended, prime leads to perceptual latency priming. In addition, a large effect of trailing primes on the onset of a target was found. As Exp 2 (n=13, mean age 26.5 yrs) demonstrated, this effect is quite robust, although smaller than that of a leading prime. In Exp 3 (n=13, mean age 24.8 yrs), masked primes were used. Under these conditions, no influence of tra AU - Scharlau, Ingrid ID - 6074 IS - 8 JF - Perception & Psychophysics KW - attention KW - leading primes KW - trailing primes KW - temporal order perception KW - perceptual latency priming KW - Adult KW - Attention KW - Female KW - Fixation KW - Ocular KW - Humans KW - Male KW - Perceptual Masking KW - Random Allocation KW - Time Perception KW - Visual Perception KW - Attention KW - Masking KW - Priming KW - Stimulus Frequency KW - Temporal Frequency KW - Temporal Order (Judgment) SN - 0031-5117 TI - Leading, but not trailing, primes influence temporal order perception: Further evidence for an attentional account of perceptual latency priming. VL - 64 ER -