This study was carried out in order to find out the possible relationships between sleep patterns and psychological characteristics. The subjects were 160 young normal students, 114 men and 46 women, aged 21 〜25 years(21.64± 1.31). Four aspects of sleep patterns (length, regularity, circardian rhythm and refreshed feeling at the time of awakening) were investigated, based on the sleep questionnaire, a sleep diary of two weeks and a Korean version of the morningness-eveningness questionnaire of Horne and Ostberg(l976). The subjects belonging to the two extreme groups of each aspect of sleep patterns (long vs. short regular vs. irregular, morning vs. evening, refreshing vs. nonrefreshing) were compaired using the Korean version of MMPI (1989). The results were as follows : 1) With each sleep pattern, the long sleepers were 23(14.38% ) ，short sleepers 16( 10.00%) ; regular sleepers 105(65.63%), irreqular sleepers 19(11.88%) ; morning type sleepers 176(10. 6 3 0 ，evening type sleepers 17(10.63%) ; refreshing sleep 45(28.12%), nonrefreshing sleep group 27(16.87%). 2) There was no significant difference between the long- and short-term sleeping groups. 3) The irreqular sleeping group showed significantly higher scores than the reqular sleeping group in H s (p < .0 1 )，P d (p < .0 5 ), and Scsubscales(p<.05). 4) The evening sleeping groups showed significantly higher scores than the morning sleeping group in F (p < .0 5 ) and Hs subscales(p<.01). 5) The nonrefreshing sleep showed significantly higher scores than the refreshing sleep group in H s(p<.001), D (p < .0 1 ), H y (p < .0 0 1 )，and Pt subscales(p<.001).
서 론
연구대상 및 방법
연 구 결 과
고 찰
결 론
References