Roik A O, Ivanizkiĭ G A
Zh Vyssh Nerv Deiat Im I P Pavlova. 2011 Nov-Dec;61(6):688-96.
The aim of the study was to find out how EEG rhythmical patterns change with gradual changes of a degree of verbal and spatial thinking involved in the process of task solving. The obtained data allowed us to draw two principally new conclusions. 1. During performance of mixed tasks the spatial and verbal thinking do not mix, and their rhythmical signs are both present with their basic properties preserved. A mixed rhythmical pattern is thus a superposition of a spatial and a verbal pattern. 2. It is possible to introduce a "distance" between mental conditions as a measure of difference in the corresponding EEG power spectra. With such distances calculated, multidimensional scaling methods may be used to represent cognitive states as points on a plane. Cognitive states form constellations with shapes reasonably reflecting psychological properties of cognitive tasks. The results suggest the existence of a "cognitive space", whose structure may be revealed by objective electrophysiological methods.
该研究的目的是找出在任务解决过程中，随着言语和空间思维程度的逐渐变化，脑电图节律模式是如何改变的。所获得的数据使我们能够得出两个主要的新结论。1. 在执行混合任务时，空间思维和言语思维不会混合，它们的节律特征都存在且基本属性得以保留。因此，混合节律模式是空间模式和言语模式的叠加。2. 可以引入心理状态之间的“距离”作为相应脑电图功率谱差异的度量。计算出这样的距离后，多维缩放方法可用于将认知状态表示为平面上的点。认知状态形成星座，其形状合理地反映了认知任务的心理属性。结果表明存在一个“认知空间”，其结构可以通过客观的电生理方法揭示。
