Brandeis R, Babkoff H
Cortex. 1985 Sep;21(3):327-57. doi: 10.1016/s0010-9452(85)80001-0.
The present study investigated the relationship of hemispheric functional specificity to a subject's use of judgmental dimensions when discriminating temporal and spatial visual stimuli using a multidimensional scaling (MDS) paired-comparison paradigm. The major purposes of the study were: To identify the judgmental dimensions used in discriminating unidimensional (temporal or spatial) and multidimensional (combinations of temporal and spatial parameters) stimuli presented to the two visual hemifields; to study the relationship of the use of judgmental dimensions to the visual hemifields; to investigate whether the use of judgmental dimensions in discriminating unidimensional stimuli can be used to predict their use in discriminating multidimensional stimuli. Subjects used two dimensions in discriminating the spatial and temporal unidimensional stimuli: A dimension whose scaling paralleled the physically interval-scaled stimuli; a dimension, in which the extreme values were located on one end of the scale, while the mid-values are located at the other end of the scale. There is significantly greater use of the spatial dimension when spatial stimuli are presented to the left visual field (LVF) then when presented to the right visual field (RVF). Conversely, there is significantly greater use of the temporal dimension when temporal stimuli are presented to the RVF then when they are presented to the LVF. Three perceptual dimensions were used to judge multidimensional stimuli: Spatial-to-temporal; stimulus quality; apparent movement. Two groups of subjects were identified who differed in their relative use of the temporally and spatially scaled unidimensional stimuli presented to the RVF. These two groups differed with respect to their relative use of a spatial-to-temporal dimension when multidimensional stimuli were presented to the RVF.
本研究使用多维标度（MDS）配对比较范式，调查了在辨别时间和空间视觉刺激时，半球功能特异性与受试者对判断维度的使用之间的关系。该研究的主要目的是：确定在辨别呈现给两个视觉半视野的单维（时间或空间）和多维（时间和空间参数组合）刺激时所使用的判断维度；研究判断维度的使用与视觉半视野之间的关系；调查在辨别单维刺激时判断维度的使用是否可用于预测其在辨别多维刺激时的使用。受试者在辨别空间和时间单维刺激时使用了两个维度：一个维度的标度与物理区间标度刺激平行；另一个维度，其极值位于标度的一端，而中间值位于标度的另一端。当空间刺激呈现给左视野（LVF）时，与呈现给右视野（RVF）时相比，对空间维度的使用明显更多。相反，当时间刺激呈现给RVF时，与呈现给LVF时相比，对时间维度的使用明显更多。使用三个感知维度来判断多维刺激：空间到时间；刺激质量；表观运动。确定了两组受试者，他们在呈现给RVF的时间和空间标度单维刺激的相对使用上存在差异。当多维刺激呈现给RVF时，这两组受试者在空间到时间维度的相对使用上存在差异。
