Woods D L, Alain C, Ogawa K H
University of California, Davis, USA.
Percept Psychophys. 1998 Feb;60(2):239-49. doi: 10.3758/bf03206033.
The time required to conjoin stimulus features in high-rate serial presentation tasks was estimated in auditory and visual modalities. In the visual experiment, targets were defined by color, orientation, or the conjunction of color and orientation features. Responses were fastest in color conditions, intermediate in orientation conditions, and slowest in conjunction conditions. Estimates of feature conjunction time (FCT) were derived on the basis of a model in which features were processed in parallel and then conjoined, permitting FCTs to be estimated from the difference in reaction times between conjunction and the slowest single-feature condition. Visual FCTs averaged 17 msec, but were negative for certain stimuli and subjects. In the auditory experiment, targets were defined by frequency, location, or the conjunction of frequency and location features. Responses were fastest in frequency conditions, but were faster in conjunction than in location conditions, yielding negative FCTs. The results from both experiments suggest that the processing of stimulus features occurs interactively during early stages of feature conjunction.
在听觉和视觉模态中，估计了在高速序列呈现任务中结合刺激特征所需的时间。在视觉实验中，目标由颜色、方向或颜色与方向特征的结合来定义。在颜色条件下反应最快，在方向条件下居中，在结合条件下最慢。特征结合时间（FCT）的估计是基于一个模型得出的，在该模型中，特征被并行处理然后结合，从而可以从结合条件与最慢的单特征条件之间的反应时间差异来估计FCT。视觉FCT平均为17毫秒，但对某些刺激和受试者来说是负的。在听觉实验中，目标由频率、位置或频率与位置特征的结合来定义。在频率条件下反应最快，但在结合条件下比在位置条件下更快，产生了负的FCT。两个实验的结果都表明，刺激特征的处理在特征结合的早期阶段以交互方式发生。
