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Psychophysical and psychophysiological studies on color perception in relation with spatial and temporal factors.

关于颜色感知与空间和时间因素相关的心理物理学和心理生理学研究。

基本信息

批准号：
03451017
负责人：
AKITA Munehira
金额：
$ 5.18万
依托单位：
Kyoto Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03451017/
关键词：
EEG Spectral MEM Analysis Colored Lights and EEG Psychophysics Psychophysiology 色覚色対比脳波解析

项目摘要

Relation between psychophysical and psychophysiological responses to colored stimuli presented on a CRT screen was investigated by the EEG recordings evoked as on- and/or off-illumination of red and/or green colored lights were given.A topographic mapping of brain waves based on data analyzed by the Maximum Entropy Method (MEM), in place of the conventional Fast Fourier Analysis (FFT), was first tried.The results were as follows: (1) There is difference in the EEG power spectral density between a closing eye and a opening eye condition recorded in a dark room. Under the former condition, alpha waves are relatively dominant while under the latter condition beta waves are as such. (2) Alpha waves are dominant in the inferotemporal area and beta waves in the frontal area. (3) A slight effect of intensity of chromatic lights are observed as a shift of the peak frequency of the spectral power density of brain waves. In the high intensity condition (59cd/m^2) peaks of the alpha wave tend to shift towards higher frequency regions, while in the low intensity condition (2.2cd/m^2) peaks of the beta wave towards lower frequency regions. (4) Alpha waves is more dominant in the inferotemporal (V4) area than in the occipital (V1) area. The fact may suggest that activities of the alph wave are inhibited in V1 area and intesified in V4 area when the eyes are exposed to a light stimulus. (5) Temporal effects ofan on-off light stimulus and an effect of light adaptation are not ovserved in change of a position and the number of peaks of the EEG power spectral density.

本文用红、绿色光照射时的脑电记录，研究了CRT屏幕上彩色刺激引起的心理生理反应和心理生理反应之间的关系。首次尝试用最大熵法（MEM）代替传统的快速傅立叶分析法（FFT）分析脑电地形图。结果如下：（1）在暗室中记录的闭眼和睁眼条件之间的EEG功率谱密度存在差异。在前一种情况下，α波相对占主导地位，而在后一种情况下，β波也是如此。(2)α波在颞下区占优势，β波在额区占优势。(3)彩光强度的轻微影响被观察为脑电波谱功率密度的峰值频率的偏移。在高强度条件下（59 cd/m^2），α波的峰值倾向于向高频区移动，而在低强度条件下（2.2 cd/m^2），β波的峰值倾向于向低频区移动。(4)α波在颞下（V4）区比在枕（V1）区更占主导地位。这一结果可能提示，当眼睛受到光刺激时，V_1区的α波活动受到抑制，V_4区的α波活动受到增强。(5)在脑电功率谱密度的峰位和峰数的变化中，没有观察到光刺激的时间效应和光适应效应。