Electrocortical and electrodermal responses covary as a function of emotional arousal: A single-trial analysis

被引:58
作者
Keil, Andreas [1 ]
Smith, J. Carson [2 ]
Wangelin, Bethany C. [1 ]
Sabatinelli, Dean [1 ]
Bradley, Margaret M. [1 ]
Lang, Peter J. [1 ]
机构
[1] Univ Florida, Dept Psychol, Ctr Study Emot & Attent, Gainesville, FL 32611 USA
[2] Univ Wisconsin, Coll Hlth Sci, Milwaukee, WI 53201 USA
关键词
dense-array EEG; emotion; motivation; arousal; picture perception; skin conductance response;
D O I
10.1111/j.1469-8986.2008.00667.x
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
Electrophysiological studies of human visual perception typically involve averaging across trials distributed over time during an experimental session. Using an oscillatory presentation, in which affective or neutral pictures were presented for 6 s, flickering on and off at a rate of 10 Hz, the present study examined single trials of steady-state visual evoked potentials. Moving window averaging and subsequent Fourier analysis at the stimulation frequency yielded spectral amplitude measures of electrocortical activity. Cronbach's alpha reached values >.79, across electrodes. Single-trial electrocortical activation was significantly related to the size of the skin conductance response recorded during affective picture viewing. These results suggest that individual trials of steady-state potentials may yield reliable indices of electrocortical activity in visual cortex and that amplitude modulation of these indices varies with emotional engagement.
引用
收藏
页码:516 / 523
页数:8
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