Ho Ming-Chou
Department of Psychology, Chung-Shan Medical University, Taichung, Taiwan.
Acta Psychol (Amst). 2011 Sep;138(1):45-51. doi: 10.1016/j.actpsy.2011.05.004. Epub 2011 May 31.
The three experiments reported here test whether object-modulated attentional spreading can be obtained when the target location is 100% certain. Experiment 1 uses the reaction time (RT)-based flanker task similar to Shomstein and Yantis (2002), and replicates the null result of the object-modulated attentional spreading. RT and accuracy (ACC) have been shown to reflect different processes: postperceptual decision vs. perceptual process (Santee & Egeth, 1982). Experiment 2 adopts the data-limited ACC-based measure and reports that attention could spread within the attended object. To avoid ceiling effects, Experiment 3 adjusts the presentation time based on the trials where the target and flankers were compatible and on the same objects, and provides the convergent evidence supporting the object-modulated attentional spreading. These results suggest that because the RT-based measure is less sensitive in reflecting the quality of perceptual representations, it is not sufficiently a strong evidence to distinguish between sensory enhancement and scanning prioritization accounts.
这里报告的三个实验测试了在目标位置100%确定的情况下，是否能够获得物体调制的注意扩展。实验1使用了类似于肖姆斯坦和扬蒂斯（2002年）基于反应时（RT）的侧翼任务，并重复了物体调制的注意扩展的零结果。反应时和准确率（ACC）已被证明反映了不同的过程：知觉后决策与知觉过程（桑蒂和埃格思，1982年）。实验2采用了基于数据限制的准确率测量方法，并报告注意可以在被关注的物体内扩展。为了避免天花板效应，实验3根据目标和侧翼兼容且在同一物体上的试验调整了呈现时间，并提供了支持物体调制的注意扩展的趋同证据。这些结果表明，由于基于反应时的测量方法在反映知觉表征质量方面不够敏感，因此它不足以作为区分感觉增强和扫描优先级解释的有力证据。
