Kline J P, Schwartz G E, Fitzpatrick D F, Hendricks S E
Department of Psychology, University of Arizona, Tucson 85721.
Int J Psychophysiol. 1993 Jul;15(1):7-14. doi: 10.1016/0167-8760(93)90090-c.
This study measured relationships between defensiveness, anxiety, and auditory-evoked potentials to tones of varied intensity. Subjects were designated as defensive if they scored > or = 7 on the L-scale of the Eysenck Personality Questionnaire, and high-anxious if they scored > or = 11 on the N-scale. Four groups resulted: 'high anxious', 'defensive high anxious', 'repressors' (i.e., defensive low anxious) and 'low anxious'. Evoked potentials were recorded from FZ, CZ, PZ, C3, C4, T3 and T4, referenced to linked ears in response to 74, 84, 94 and 104 dB SPL tones. High-defensive subjects showed lower P2 amplitudes to the 94 and 104 dB tones and lower amplitude/intensity slopes at FZ, CZ, C3 and C4. High-anxious subjects showed lower P2 amplitudes to all four stimulus intensities at FZ, CZ and PZ. The results are consistent with the hypothesis that defensiveness is associated with desensitization to intense or painful stimulation.
本研究测量了防御性、焦虑与不同强度纯音诱发的听觉诱发电位之间的关系。如果受试者在艾森克人格问卷的L量表上得分≥7，则被指定为防御型；如果在N量表上得分≥11，则为高焦虑型。由此产生了四组：“高焦虑组”、“防御性高焦虑组”、“压抑组”（即防御性低焦虑组）和“低焦虑组”。在FZ、CZ、PZ、C3、C4、T3和T4记录诱发电位，以双耳相连作为参考，以响应74、84、94和104 dB SPL的纯音。高防御性受试者对94和104 dB纯音的P2波幅较低，在FZ、CZ、C3和C4处的波幅/强度斜率也较低。高焦虑受试者在FZ、CZ和PZ处，对所有四种刺激强度的P2波幅都较低。结果与防御性与对强烈或疼痛刺激的脱敏相关的假设一致。
