Meinecke Cristina, Donk Mieke
Institut für Psychologie, Ludwig-Maximilians-Universität München, Germany.
Perception. 2002;31(5):591-602. doi: 10.1068/p3201.
We carried out three experiments to investigate detection performance in pop-out tasks and analysed how performance varied as a function of display size (number of elements) and retinal eccentricity of the target. Results showed that when display size was increased from 2 to 81 elements performance first decreased and then increased (replicating Sagi and Julesz, 1987 Spatial Vision 2 39-49). Performance variations differed as a function of eccentricity and often were more pronounced in the periphery than in the foveal area. This retinal-eccentricity influence suggests that processes underlying detection performance in small display sizes are different from those in large display sizes. One should be careful when using the variation of display size as an instrument to analyse visual-search processes because this analysis could be based on a comparison between non-equivalent conditions.
我们进行了三项实验来研究弹出式任务中的检测性能，并分析了性能如何随显示大小（元素数量）和目标的视网膜偏心度而变化。结果表明，当显示大小从2个元素增加到81个元素时，性能先下降然后上升（重复了萨吉和朱尔兹1987年发表于《空间视觉》第2卷第39 - 49页的研究结果）。性能变化因偏心度而异，并且在外周通常比在中央凹区域更明显。这种视网膜偏心度的影响表明，小显示大小下检测性能的潜在过程与大显示大小下的不同。在将显示大小的变化用作分析视觉搜索过程的工具时应谨慎，因为这种分析可能基于非等效条件之间的比较。
