Response times (RTs) in visual search were measured with either a single target specified by colour, motion, spatial frequency, or orientation alone, or specified by pairwise conjunctions of these features, or by presenting double targets, each specified by a separate feature. First, for all feature combinations, except for motion–colour, RTs were faster when double features were used to specify a single target than when they specified separate targets, implying location-specific redundancy gains predicted by coactivation on a common location-specific map. Second, coactivation, as revealed by race-model violations, occurred for all double-feature single-target conditions except the motion–colour and colour–orientation combinations. No violations occurred in double-target conditions. Taken together, these results are accounted for by well-known feature-specific sensitivities of cortical V1 cells and provide further evidence for a V1 locus of redundancy gain in visual search.
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References
1.
CavanaghPArguinMTreismanA, 1990“Effect of surface medium on visual search for orientation and size features”Journal of Experimental Psychology: Human Perception and Performance16479–491.
2.
CaveK RWolfeJ M, 1990“Modeling the role of parallel processing in visual search”Cognitive Psychology22225–271.
3.
ChambersC DBrownM, 2003“Timing accuracy under Microsoft Windows revealed through external chronometry”Behavior Research Methods, Instruments, & Computers3596–108.
4.
CorballisM C, 1998“Interhemispheric neural summation in the absence of the corpus callosum”Brain1211795–1807.
5.
DiederichAColoniusH, 1987“Intersensory facilitation in the motor component? A reaction time analysis”Psychological Research4923–29.
6.
ForsterBCavina-PratesiCAgliotiS MBerlucchiG, 2002“Redundant target effect and the intersensory facilitation from visual–tactile interactions in simple reaction time”Experimental Brain Research143480–487.
7.
FoundA PMüllerH J, 1996“Searching for feature targets on more than one dimension: Investigating a dimension weighting account”Perception & Psychophysics5888–101.
8.
GegenfurtnerK RKiperD CFenstemakerS B, 1996“Processing of color, form, and motion in macaque area V2”Visual Neuroscience13161–172.
9.
HorwitzG DAlbrightT D, 2005“Paucity of chromatic linear motion detectors in macaque V1”Journal of Vision5525–533.
10.
HubelD HWieselT N, 1959“Receptive fields of single neurons in the cat's visual cortex”Journal of Physiology148574–591.
11.
HughesH CTownsendJ T, 1998“Varieties of binocular interaction in human vision”Psychological Science953–60.
12.
KochCUllmanS, 1985“Shifts in selective visual attention: Towards the underlying neural circuitry”Human Neurobiology4219–227.
13.
KoeneA RZhaopingL, 2007“Feature-specific interactions in saliency from combined feature contrasts: Evidence for a bottom–up saliency map in V1”Journal of Vision71–14.
14.
KrummenacherJMuellerH JHellerD, 2002“Visual search for dimensionally redundant pop-out targets: Parallel-coactive processing of dimensions is location specific”Journal of Experimental Psychology: Human Perception and Performance281303–1322.
15.
LiZ, 2002“A saliency map in primary visual cortex”Trends in Cognitive Sciences69–16.
16.
LivingstoneMHubelD H, 1988“Segregation of form, color, movement, and depth: Anatomy, physiology, and perception”Science240740–749.
17.
MillerJ, 1982“Divided attention: Evidence for coactivation with redundant signals”Cognitive Psychology14247–279.
18.
MillerJ OUlrichRLamarreY, 2001“Locus of the redundant signals effect in bimodal divided attention”Perception & Psychophysics63555–562.
19.
MonnierP, 2006“Detection of multidimensional targets in visual search”Vision Research464083–4090.
20.
MordkoffJ TMillerJRochA C, 1996“Absence of coactivation in the motor component: Evidence from psychophysiological measures of target detection”Journal of Experimental Psychology: Human Perception and Performance2225–41.
21.
NickersonR S, 1973“Intersensory facilitation of reaction time: Energy summation or preparation enhancement?”Psychological Review80489–509.
22.
PoomLBörjessonE, 2005“Colour, polarity, disparity, and texture contributions to motion segregation”Perception341193–1203.
23.
RaabD H, 1962“Statistical facilitation of simple reaction times”Transactions of the New York Academy of Sciences24574–590.
24.
SchillerP HLogothetisN KCharlesE R, 1990“Functions of the colour-opponent and broad-band channels of the visual system”Nature34368–70.
25.
SegalowitzS JGravesR E, 1990“Suitability of the IBM XT, AT, and PS/2 keyboard, mouse, and game port as response devices in reaction time paradigm”Behavior Research Methods, Instruments, & Computers22283–289.
26.
TamuraHSatoHKatsuyamaNHataYTsumotoT, 1996“Less segregated processing of visual information in V2 than in V1 of the monkey visual cortex”European Journal of Neuroscience8300–309.
27.
ToddJ W, 1912“Reaction to multiple stimuli”, in Archives of Psychology: No. 25. Columbia Contributions to Philosophy and Psychologyvolume 21, no. 8 Ed. WoodworthR S, (New York: Science Press).
28.
TsoD YGilbertC D, 1988“The organization of chromatic and spatial interactions in the primate striate cortex”Journal of Neuroscience81712–1727.
29.
TurattoMMazzaVSavazziSMarziC A, 2004“The role of the magnocellular and parvo-cellular systems in the redundant target effect”Experimental Brain Research158141–150.
30.
UlrichRMillerJSchrötterH, 2007“Testing the race model inequality: An algorithm and computer programs”Behavior Research Methods39291–302.
31.
WolfeJ M, 1994“Guided search 2.0: A revised model of visual search”Psychonomic Bulletin and Review1202–238.
