• Journal of Yeungnam Medical Science
• /
• v.10 no.1
• /
• pp.48-57
• /
• 1993

The purpose of this study was to investigate the characteristics of personality dimensions of schizophrenics. Subjects in this study were 71 chronic schizophrenics, 59 acute schizophrenics, and 87 normal persons. All subjects was asked to respond to EPQ(Korean Version Eysenck Personality Questionnaire). Collected data were analyzed by using the statistical techniques of discriminant function analysis, t-test and one-way variable analysis. The results were as follows : Acute and chronic schizophrenics were higher than normal persons on psychoticism score. However, there was no significant difference between chronic and acute schizophrenics on the psychoticism score. Discriminant analysis was adopted to identify the scales in EPQ that were most effective in discriminating between normals and schizophrenics. Psychoticism of EPQ function was the most effective variable that discriminates between the normals and the schizophrenics.

• Journal of Korean Society of Transportation
• /
• v.32 no.1
• /
• pp.50-62
• /
• 2014

The number of traffic accidents has been decreased since 2000; however, the downward trend of crash occurrence has been slower after 2006. A few decades ago, physical improvement projects such as alignment improvement and the installation of safety facilities were usually implemented to decrease the occurrence of traffic accidents, but the effects of physical improvement on safety have been gradually decreased. The main objective of this study is to identify how the drivers' characteristics affect and/or are related to traffic accidents. Most of previous works have focused on revealing the difference of the nature of the drivers between the drivers who have no experience and the drivers with experience of traffic accidents. This study tries to analyze the habitual accidents proneness through a survey of drivers' personalities for drivers who were involved in traffic accidents at least once. As a result, nine personality factors were found to be statistically significant: Neuroticism(N), Lie(L), Psychoticism* Neuroticism(PN), Psychoticism*Lie(PL), Extraversion*Lie(EL), Neuroticism*Lie(NL), Impulsiveness(IMP), Venturesomeness(VEN), Empathy(EMP). Among these factors, single character factors were found to increase accidents, whereas complex factors were found to decrease the occurrence of accidents.

• Sleep Medicine and Psychophysiology
• /
• v.21 no.1
• /
• pp.21-28
• /
• 2014

Objective: Few studies have evaluated the personality characteristics of patients with obstructive sleep apnea (OSA) and simple snoring. We investigated the personality characteristics of OSA and simple snoring patients and compared differences in personality between the two groups using the Eysenck Personality Questionnaire (EPQ). Materials and Methods: Two hundred and thirty-seven patients who were suspected to have OSA or simple snoring participated in this study. A self-questionnaire which included the EPQ was administered to all participants. All subjects underwent polysomnography in a sleep laboratory and those with an apnea-hypopnea index (AHI) ${\geq}5$ were included in the OSA group, while those with an AHI <5 were included in the simple snoring group. Results: OSA patients had significantly lower scores for Psychoticism (F=4.563, p=0.034) than simple snorers. There were no significant differences in Extraversion (F=3.029, p=0.083), Lie (F=0.398, p=0.529), or Neuroticism (F=3.367, p=0.068) scores between the two groups. In the correlation analysis of the OSA group, AHI was positively correlated with Extraversion score (r= 0.16, p=0.029) and negatively correlated with Lie score (B=-0.31, p<0.001). Using multiple stepwise linear regression analysis with the four EPQ parameter scores as dependent variables, Lie score was associated with older age (B=0.14, p<0.001) and lower AHI (B=-0.05, p<0.001), Psychoticism score was associated with higher Pittsburgh Sleep Quality Index (PSQI ; B=0.14, p<0.001), Neuroticism score was associated with higher PSQI (B=0.34, p=0.001) and female sex (B=3.15, p=0.003), and Extraversion score was associated with younger age (B=-0.08, p=0.020) and higher body mass index (B=0.26, p=0.023). Conclusion: This study suggests that patients with OSA are significantly less prone to psychotic personality characteristics than those with simple snoring. Among OSA patients, higher AHI was correlated with low falsehood and high extraversion tendencies.

• Journal of Oriental Neuropsychiatry
• /
• v.23 no.4
• /
• pp.95-106
• /
• 2012

Objectives : The purpose of this study is to study the personality traits of Sasang constitutions by comparing the profiles of Temperament and Character Inventory (TCI) and Eysenck Personality Questionnaire (EPQ). Methods : A total of 110 healthy people (20 to 40 years old), except for 2 Taeyangin (TY type), were analyzed; 45 Taeeumin (TE type), 32 Soyangin (SY type), and 31 Soeumin (SE type). A Sasang constitutional medicine specialist diagnosed the Sasang constitution after analyzing the result of a Two Step Questionnaire for Sasang Constitution Diagnosis (TS-QSCD), the external appearance, temperament and symptoms. The dimensions of TCI and EPQ were compared among the different Sasang constitutions, using an analysis of variance, and correlations between TCI and EPQ were analyzed by a Pearson correlation method. Results : Among the four temperament dimensions of TCI, SY type showed a significantly higher score than the SE type in Novelty Seeking. SE type showed significantly higher score than TE and SY type in Harm Avoidance. SY type showed significantly higher score than SE type in Reward Dependence. TE and SY type showed significantly higher score than SE type in Persistence. There were no significant differences in the character dimensions of Self-directness, Cooperativeness and Self-Transcendence. Among the seven dimensions of EPQ, TE and SY type showed significantly higher score than SE type in Extraversion. SE type showed significantly higher score than SY type in Lie. SY type showed significantly higher score than TE and SE type in Impulsiveness. Conclusions : The results demonstrated that there are some significant differences of personality traits among Sasang constitutions. This could help diagnose and understand each Sasang constitution.

• Sleep Medicine and Psychophysiology
• /
• v.8 no.1
• /
• pp.59-66
• /
• 2001

Objectives: This study examined the effect of mood and personality characteristics on psychophysiological responses measured by a biofeedback system in a normal population. Methods: Fifty healthy volunteers without any history of medical or psychiatric illnesses participated in this study. We measured the Spielberger trait anxiety inventory, Beck depression inventory, and Eysenck personality questionnaires in these subjects. Using the J & J biofeedback system, we also measured skin temperature, electrodermal response, forearm and frontal electromyography (EMG)s in 3 experimental conditions of baseline, stress, and recovery phases. Results: Trait anxiety did not show any significant correlation with psychophysiological responses except stress response in forearm EMG levels(r=0.282, p<0.05). Depressed mood was negatively correlated with forearm EMG levels in baseline (r=-0.299, p<0.05) and recovery phases(r=-0.314, p<0.05). Subjects with relatively high levels of depressed mood showed different stress and recovery responses in frontal EMG levels compared with those with relatively low levels of depressed mood (F=4.26, p<0.05). Extroverted subjects showed higher levels of forearm EMG than introverted ones in stress phase. Conclusion: Mood and personality characteristics in healthy subjects are closely related with psychophysiological responses measured by a biofeedback system. We suggest that mood and personality characteristics should be considered as important variables in analyzing abnormal psychophysiological responses in some psychiatric patients.