Spatial attention can modulate unconscious orientation processing

被引:39
作者
Bahrami, Bahador [1 ]
Carmel, David [1 ,2 ,3 ]
Walsh, Vincent [1 ,2 ]
Rees, Geraint [1 ,3 ]
Lavie, Nilli [1 ,2 ]
机构
[1] UCL, Inst Cognit Neurosci, London WC1N 3AR, England
[2] UCL, Dept Psychol, London WC1H 0AP, England
[3] UCL, Inst Neurol, Wellcome Dept Imaging Neurosci, London WC1N 3BG, England
基金
英国惠康基金;
关键词
D O I
10.1068/p5999
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
It has recently been suggested that visual spatial attention can only affect consciously perceived events. We measured the effects of sustained spatial attention oil orientation-selective adaptation to gratings, rendered invisible by prolonged interocular suppression. Spatial attention augmented the orientation-selective adaptation to invisible adaptor orientation. The effect of attention was clearest for test stimuli at peri-threshold, intermediate contrast levels, suggesting that previous negative results were due to assessing orientation discrimination at maximum contrast. Oil the basis of these findings we propose a constrained hypothesis for the difference between neuronal mechanisms of spatial attention in the presence versus absence of awareness.
引用
收藏
页码:1520 / 1528
页数:9
相关论文
共 23 条
[1]   Attentional load modulates responses of human primary visual cortex to invisible stimuli [J].
Bahrami, Bahador ;
Lavie, Nilli ;
Rees, Geraint .
CURRENT BIOLOGY, 2007, 17 (06) :509-513
[2]   Strength of early visual adaptation depends on visual awareness [J].
Blake, R ;
Tadin, D ;
Sobel, KV ;
Raissian, TA ;
Chong, SC .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2006, 103 (12) :4783-4788
[3]  
BLAKEMORE C, 1969, J PHYSIOL-LONDON, V200, pP11
[4]   Cortical responses to invisible objects in the human dorsal and ventral pathways [J].
Fang, F ;
He, S .
NATURE NEUROSCIENCE, 2005, 8 (10) :1380-1385
[5]   Attentional states and the degree of visual adaptation to gratings [J].
Festman, Y ;
Ahissar, M .
NEURAL NETWORKS, 2004, 17 (5-6) :849-860
[6]   Adaptation, after-effect and contrast in the perception of tilted lines. I. Quantitative studies [J].
Gibson, JJ ;
Radner, M .
JOURNAL OF EXPERIMENTAL PSYCHOLOGY, 1937, 20 :453-467
[8]   Attentional effects on contrast discrimination in humans: evidence for both contrast gain and response gain [J].
Huang, LQ ;
Dobkins, KR .
VISION RESEARCH, 2005, 45 (09) :1201-1212
[9]   A new perceptual illusion reveals mechanisms of sensory decoding [J].
Jazayeri, Mehrdad ;
Movshon, J. Anthony .
NATURE, 2007, 446 (7138) :912-915
[10]   The scope and limits of top-down attention in unconscious visual processing [J].
Kanai, Ryota ;
Tsuchiya, Naotsugu ;
Verstraten, Frans A. J. .
CURRENT BIOLOGY, 2006, 16 (23) :2332-2336