Gorea A, Papathomas T V, Kovacs I
Laboratoire de Psychologie Expérimentale, Centre National de la Recherche Scientifique and René Descartes University, Paris, France.
Proc Natl Acad Sci U S A. 1993 Dec 1;90(23):11197-201. doi: 10.1073/pnas.90.23.11197.
We present psychological experiments that reveal two motion systems, a specific and an unspecific one. The specific system prevails at medium to high temporal frequencies. It comprises at least two separate motion pathways that are selective for color and for luminance and that do not interact until after the motion signal is extracted separately in each. By contrast, the unspecific system prevails at low temporal frequencies and it combines color and luminance signals at an earlier stage, before motion extraction. The successful implementation of an efficient and accurate technique for assessing equiluminance corroborates further the main findings. These results offer a general framework for understanding the nature of interactions between color and luminance signals in motion perception and suggest that previously proposed dichotomies in motion processing may be encompassed by the specific/unspecific dichotomy proposed here.
我们展示了一些心理学实验，这些实验揭示了两种运动系统，一种是特定的，另一种是非特定的。特定系统在中高时间频率下占主导地位。它至少包括两条独立的运动通路，一条对颜色有选择性，另一条对亮度有选择性，并且在每条通路中分别提取运动信号之后才相互作用。相比之下，非特定系统在低时间频率下占主导地位，并且在运动提取之前的更早阶段就将颜色和亮度信号结合起来。一种评估等亮度的高效准确技术的成功实施进一步证实了主要发现。这些结果为理解运动感知中颜色和亮度信号之间相互作用的本质提供了一个通用框架，并表明先前提出的运动处理二分法可能包含在此处提出的特定/非特定二分法之中。
