O'Boyle M W, Hellige J B
Brain Cogn. 1982 Apr;1(2):224-43. doi: 10.1016/0278-2626(82)90019-7.
Observers indicated whether a single probe letter presented to the left visual field/right hemisphere (LVF-RH) or to the right visual field/left hemisphere (RVF-LH) matched one of two, three, four, or five set letters in both name and case. For positive trials during the initial experimental session, the slope of the linear memory set size reaction time function was increased by perceptually degrading the probe letter on LVF-RH trials, but not on RVF-LH trials. In addition, perceptual degradation of the probe letter increased the intercept of the memory set size function more on RVF-LH trials than on LVF-RH trials. During subsequent experimental sessions, the same pattern of intercept results was obtained but perceptual degradation of the probe no longer changed the slope for either LVF-RH or RVF-LH trials. However, the slopes were uniformly lower on RVF-LH trials than on LVF-RH trials. The major results are consistent with hypothesized right-hemisphere efficiency for early processing stages and left-hemisphere efficiency for serial processing of alphanumeric information. The results further illustrate the importance of separating stages of processing in studies of cerebral laterality and indicate that the relative difficulty of the various stages can be a determinant of laterality results.
观察者指出呈现给左视野/右半球（LVF-RH）或右视野/左半球（RVF-LH）的单个探测字母在名称和大小写方面是否与两个、三个、四个或五个既定字母中的一个匹配。在初始实验阶段的阳性试验中，通过在LVF-RH试验中对探测字母进行感知降解来增加线性记忆集大小反应时间函数的斜率，但在RVF-LH试验中则不然。此外，探测字母的感知降解在RVF-LH试验中比在LVF-RH试验中更能增加记忆集大小函数的截距。在随后的实验阶段，获得了相同的截距结果模式，但探测字母的感知降解不再改变LVF-RH或RVF-LH试验的斜率。然而，RVF-LH试验的斜率始终低于LVF-RH试验。主要结果与早期处理阶段右半球效率以及字母数字信息串行处理左半球效率的假设一致。结果进一步说明了在大脑偏侧性研究中分离处理阶段的重要性，并表明各个阶段的相对难度可能是偏侧性结果的一个决定因素。
