Linnell K J, Humphreys G W
School of Psychology, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.
Perception. 2001;30(1):49-60. doi: 10.1068/p2800.
Within-dimension conjunction search for red-green targets amongst red-blue, and blue-green, nontargets is extremely inefficient (Wolfe et al, 1990 Journal of Experimental Psychology: Human Perception and Performance 16 879-892). We tested whether pairs of red-green conjunction targets can nevertheless be processed spatially in parallel. Participants made speeded detection responses whenever a red-green target was present. Across trials where a second identical target was present, the distribution of detection times was compatible with the assumption that targets were processed in parallel (Miller, 1982 Cognitive Psychology 14 247-279). We show that this was not an artifact of response-competition or feature-based processing. We suggest that within-dimension conjunctions can be processed spatially in parallel. Visual search for such items may be inefficient owing to within-dimension grouping between items.
在红色-蓝色和蓝色-绿色非目标物中搜索红-绿目标物的维度内联合搜索效率极低（沃尔夫等人，1990年《实验心理学杂志：人类感知与表现》16 879-892）。我们测试了红-绿联合目标物对是否仍能在空间上并行处理。每当出现红-绿目标物时，参与者做出快速检测反应。在存在第二个相同目标物的试验中，检测时间的分布与目标物并行处理的假设相符（米勒，1982年《认知心理学》14 247-279）。我们表明这不是反应竞争或基于特征处理的假象。我们认为维度内联合可以在空间上并行处理。由于项目之间的维度内分组，对这类项目的视觉搜索可能效率低下。
