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Effects of personality characteristics on the structure of sleep in ten normal subjects between the ages of 21–33 under stressors of various modalities were studied. Several psychological tests and polygraph recording of sleep during three nights (adaptation, background, and after emotional stress, which was modeled using the pretension level paradigm) were conducted. Statistical cluster analysis of the psychological test results revealed two groups of subjects. The first group predominantly used active coping mechanisms and was characterized by more pronounced alterations of sleep structure in response to adaptation stress (the first night in the laboratory). The second group used nonadaptation coping strategy. The sleep structure in these subjects more significantly changed in response to emotional stress. |
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