• Sleep Medicine and Psychophysiology
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• v.10 no.1
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• pp.32-38
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• 2003

Objectives: The purpose of this study is to investigate the effects of stress and personality on sleep patterns, and further, to identify potential correlations between stress and personality characteristics. Methods: A total of 174 healthy college students were subjects for this study. Participants filled out the Daily Stress Inventory before sleep and the Modified Pittsburgh Sleep Quality Index after sleep on three consecutive days. They also filled out the 16 Personality Factor Questionnaire (16-PF), BDI (Beck Depression Inventory) and STAI (State-Trait Anxiety Inventory). Results: Minor stresses highly correlated with subjective sleep quality and symptoms of non-restorative sleep. However, total sleep time, sleep latency, awakening frequency, and frequency of dreams were not explained by stress scores. The O (guilty feeling), C (low ego strength) and Q4 (high anxiety) factors of the 16-PF also highly correlated with symptoms of non-restorative sleep and significantly affected sleep patterns. BDI and STAI scores also correlated with the above personality factors and minor stresses. Conclusion: This study showed that minor stresses impaired the restorative effects of sleep. Personality characteristics such as low ego strength, high levels of anxiety, and feelings of guilt were vulnerable to minor stresses. Minor stress, various personality characteristics, different coping patterns, and emotional response are highly correlated with each other and affect sleep patterns.

• Sleep Medicine and Psychophysiology
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• v.5 no.1
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• pp.71-79
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• 1998

Objectives : This study was to evaluate sleep patterns and daytime sleepiness resulting from rotating shiftwork. The authors, also, tried to find out the relationship between the severity of daytime sleepiness and personality factors. Methods : The subjects consisted of 41 female rotating shiftwork nurses and the control group consisted of 39 female day timeworkers. All of them completed the Sleep questionnaire of Korea University Sleep Disorder Clinic, the Epworth Sleepiness Scale(ESS), the 16 Personality Factors(16PF), the Beck Depression Inventory(BDI) and the State Trait Anxiety Inventory(STAI). Multiple regression analysis of 16PF of the rotating shiftwork nurses was done to find out possible predictors of the severity of daytime sleepiness. Results : The mean duration of deprived sleep due to rotating shiftwork was $64.26\;{\pm}\;14.54\;min$. The frequency of sleep difficulty($1.24\;{\pm}\;1.17\;day/week$ vs $0.67\;{\pm}\;1.31\;day/week$, p < 0.05), time needed to fall asleep($103.05\;{\pm}\;73.48\;min$. vs $70.00\;{\pm}\;60.08\;min$, p < 0.05), sleep duration when having some difficulties in sleep ($204.25\;{\pm}\;79.90\;min$. vs $280.44\;{\pm}\;111.59\;min$., p < 0.001), recent changes in energy($x^2\;=\;4.16$, p < 0.05), worrying about sleep($x^2\;=\;11.08$, p < 0.05), and taking naps($x^2\;=\;4.98$, p < 0.05) showed significant differences between rotating shiftworkers and normal controls. The ESS socre of shiftworkers ($8.68\;{\pm}\;3.04$) was greater than that of normal controls ($6.86\;{\pm}\;3.04$)(p < 0.01). Personality factors such as C factor($R^2\;=0.283$), I factor($R^2\;=0.358$) and G factor($R^2\;=0.470$) were related with the severity of the daytime sleepiness(p < 0.001). Conclusions : The rotating shiftwork nurses had more difficulties in sleep such as having difficulties in falling asleep and in maintaining sleep, and showed lowered energy, decreased senses of well-being and so on. The rotating shiftwork nurses experienced more severe daytime sleepiness than controls did. Personality factors, such as C factor, I factor, and G factor of 16PF were suggested to be useful for predicting the severity of daytime sleepiness resulting from rotating shiftwork.

• Journal of the Korea Convergence Society
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• v.12 no.4
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• pp.237-248
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• 2021

Based on sports known to reduce adolescents' smartphone addiction, this study aims to identify the structural causal relationship between sport commitment and smartphone addiction. First of all, based on prior studies, it was intended to show that adolescents' sport commitment is effective in reducing smartphone addiction through social support and ego-resilience, and that such causal relationships vary significantly depending on gender. To this end, a survey of 605 middle and high school students was conducted, and the structural relationship between the four established latent variables was analyzed by analyzing the structural equation model using the SPSS 25.0 and AMOS 23.0 programs. According to the analysis, adolescents' sport commitment was found to have an adverse effect on smartphone addiction, and social support and ego-resilience in the relationship between the two variables were found to have a mediated effect. In addition, these results showed significant differences in gender. This study expanded the field of smartphone addiction and sports convergence study by revealing the relationship between sport commitment as psychological recognition variable and addiction Unlike previous studies using a participation time, duration, and intensity, and suggested that structural relationships with personal characteristic variables and gender-specific approaches are important. Through this, it is meaningful that it provided basic data for in-depth convergence study in the smartphone addiction and development of gender-specific programs.

• Journal of Korea Entertainment Industry Association
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• v.15 no.4
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• pp.45-54
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• 2021

Jeong Sun-Ah built up her performance career for twenty years with bold and energetic acting and solidified her status as a leading actress of Korean musical since her debut. To benefit from the value of her experience this study performed an in-depth interview with her, applying the Theory of "Projection" and "Back-projection", which are the psychological principles of acting, and derived "acting(entering the roles)" and "de-acting(leaving the roles)" techniques. As result, Her acting mechanism involved emptying her ego, embodying a persona by projecting the role created by intensive exploration of materials like previous performance, film of the same title, original novel, and script, and then getting the ego back by back-projecting through dynamic activities such as overseas travel and dance. She pre-studied the roles by physically visiting sites that are important to the characters. She was unique in that she pursued a difference by changing vocal trainers for each musical production and undertook more intense physical training than vocal practice to achieve powerful singing performance. In most of her works (75%), she suffered from aftereffects such as depression, narcissism, hysteria, and insomnia due to disorder caused by breaking away from the roles. However, she relied on self-help and alternatives are needed in the future such as reinforcement of expert counselling. Jeong Sun-Ah appeared on an average of 1.6 productions per year, practiced for an average of 1.7 months, and performed for an average of 3.9 months with an average of 100 days of break between productions. Her performance record from this research demonstrates her constant preparation and passion, as well as the know-how of reserving and distributing energy. So, it has a valuable implications for acting education and self-management of actors and actress.

• Journal of Digital Convergence
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• v.17 no.8
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• pp.197-204
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• 2019

The purpose of this study was to explore factors that influence decision making for smartphone users. This study sets intimacy, personal connection, use & dependence, familiarity and expertise, efficacy and effectance, self-identity, and control as independent variables and sets decision making as dependent variables. In this study, 200 smartphone users were collected and analyzed through questionnaires, and Smartpls 3.0 was used to understand the impact between variables. Five of the six factors that affected smartphone users' psychological strength were analyzed to have affected their decision-making. In addition, we examined the relationship between psychological effects and use period as a control variable. The results of this study can be used as a basis for the consumer behavior of smartphone devices in the development of smartphone devices.

• Journal of Leisure Studies
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• v.9 no.2
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• pp.39-59
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• 2011

The purpose of this study is to understand and investigate the process of making negotiation strategy to do leisure activity with overcoming leisure constraints which highschool students participating in their club activity meet. For this study, students who have at least one-year career for their club activity -more than two times a week and two hours at a time -were selected. Survey through in-depth interview, non-participating observation and field note were conducted. The results are as follow. Firstly, the fascination for club activity was the important factor for overcoming leisure constraints. Secondly, leisure constraints never let students stop doing their activity. Thirdly, the subjects of this study practiced negotiation strategies and came to have self-achievement and self-esteem, improving their relationships effectively. Finally, it was found out that they were creating their own club culture with continuous leisure constraints negotiation. The results of this study present the case and the method of continuous students' participation in their leisure and are able to help them to build up their positive leisure experiences.

• Korean Journal of Culture and Social Issue
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• v.29 no.1
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• pp.1-23
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• 2023

The purpose of this study was to validate the Suicidal Ideation Attributes Scale(SIDAS) which can measure the severity of suicidal ideation in a sample of 399 Korean adults. For this purpose, an online survey was conducted for two weeks from July 2020 to August 2020. First, there were differences in SIDAS scores among groups divided by gender, residence status, depression and anxiety symptoms, suicidal ideation, suicidal plan, suicidal preparation, and suicidal attempt. Second, correlations between SIDAS, C-SSRS suicidal ideation intensity question(3 items), and the Rosenberg Self-efficacy (RSE) were examined to confirm the validity of SIDAS. As a result, correlations between the SIDAS and suicidal ideation intesity items of C-SSRS were significant in all items, while correlations between the SIDAS and RSE items were negative or insignificant. Third, as a result of the confirmatory factor analysis of SIDAS on all respondents and respondents with suicidal ideation, a single factor structure was appropriate for both groups. Internal consistency of SIDAS was also good. Lastly, as a result of identifying the variables affecting the suicidal plan over the past year, controllability and age were identified as significant predictive variables. SIDAS which was designed to be administered through web, can be appropriately used in Korea. It was confirmed that SIDAS is a reliable and valid suicidal ideation scale which is applicable to adults in Korea.

• The Journal of the Korea Contents Association
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• v.13 no.12
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• pp.337-347
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• 2013

The purpose of this study was to examine the influence of the satisfaction level of dental hygiene students with their own appearance and their body images on interpersonal relationships. Structured questionnaires were utilized to gather data from dental hygiene students from April 1 to May 7, 2013. The students investigated got a mean of $2.79{\pm}0.42$, $2.85{\pm}0.53$ and $3.23{\pm}0.48$ in appearance satisfaction, body image and interpersonal relationship abilities respectively. Interpersonal relationship abilities had a positive correlation to appearance satisfaction and body strength, one of its subfactors, and interpersonal skills were positively correlated to body image as well. As appearance satisfaction and body image were identified as influential factors for interpersonal relationship abilities, it's quite important for individuals to have a positive self-concept to build good interpersonal relationships. Therefore personal counseling should be provided for students to take the right view of their own appearance and bodies, and the development and implementation of diverse programs are required as well.

• Science of Emotion and Sensibility
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• v.13 no.1
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• pp.163-178
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• 2010

Emotional associations formed in the relationships between the consumer and luxury brands can be approached via examining the roles these associations play when they account for the brand equity of the luxury brands. The present study is an exploratory examination on the effects a battery of emotional relationships exert upon the consumers' intention to participate in promotional activities and in communities built around the brand, which is a crucial part of the luxury brand's equity, in regards to Korea's burgeoning import auto market. Participants who completed the survey are professionals such as medical doctors, lawyers, accountants, and university professors. Included in the analyses are the top six automobile brands in sales(i.e., BMW, Lexus, Mercedes-Benz, Honda, Audi, and Volkswagen), and the scores that the respondents provided regarding the way they relate themselves to particular foreign car brands are analyzed and yield six different groups of emotional associations(i.e., affection, identification, indispensability, reliability, intimacy, and awe). The brand equity is measured with three variables that show the levels of the consumer's participatory intentions toward each brand are analyzed in order to elicit the antecedent variables and their impact on the participation variables in the regression models. When the respondents are divided into two groups by the levels of brand knowledge(i.e., scores drawn from the respondent's capability of correctly linking specific automobile brands with the corresponding corporate brands), consumers with higher brand knowledge show distinct patterns of influential variables, as they differentiate themselves from less knowledgeable consumers in terms of the influential antecedent variables accounting for the consumer's intended participation.

• Korea journal of population studies
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• v.27 no.2
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• pp.1-34
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• 2004

최근 한국사회에서는 출산율의 저하로 인한 사회경제적 영향을 우려하여 대책방안을 강구하여야 한다는 논의가 증대되고 있다. 그런데 국가정책을 개발${\cdot}$추진하기 이전에 반드시 요구되는 것은 저출산 현상의 올바른 인식과 철저한 원인규명이다. 따라서 본 연구에서는 출산율 변화의 원인을 다각적으로 살펴보고, 향후 변화방향을 전망해 보고자 한다. 먼저 자녀출산의 변화를 결혼상태 변화와 유배우부인의 출산율 변화 부분으로 나누어 살펴본 결과, 과거와는 달리 최근의 출산율 저하는 유배우 부인에 의해서가 아니라 미혼자의 결혼연장 또는 독신생활에서 기인되는 것으로 나타났다. 이들 두 요인에 영향을 주는 변수로는 경기침체 및 직장불안정, 결혼가치관의 변화와 초혼연령의 상승, 자녀양육 관심증대, 자녀양육비 부담, 가정과 직장의 양립을 위한 사회적 인프라 부족, 여성의 자아욕구 및 사회참여 증대, 자녀효용가치 감소, 이혼 등 가족해체의 증대, 그리고 불임부부의 증대 등인 것으로 판단된다. 향후 출산율 변화를 전망해 보면, 저출산을 일찍 경험한 서구 선진국의 경우와는 달리 정책의 추진에 한계가 있어 선진국보다 더 낮은 출산율을 회복하는 데는 많은 어려움이 있을 것이라는 판단이다. 더군다나 젊은 미혼남녀의 가치관이 개인주의화 되는 경향이 있다는 점을 감안한다면 출산율 회복정책을 추진한다 하더라도 한계가 있을 수밖에 없을 것이다. 수년간 실시된 각종 실태조사를 분석한 결과에 의하면 현재의 경기침체가 회복될 경우 약 20%의 출산율 상승 가능성이 있으며, 이 때의 합계출산율은 약 1.43명 수준이 될 수 있을 것으로 예견된다. 또한 종합적 체계적 출산회복정책을 효과적${\cdot}$효율적으로 추진한다면 약 10년 후에는 합계출산율이 약 1.6 수준으로 회복될 것이라는 낙관적 견해를 가져본다. 그렇지만 정책의 강도에 따라서 회복수준은 현저하게 상이할 것이다.를 진단, 치료함에 있어 진행성 신질환의 가능성을 시사하는 예후인자가 없다면 신생검보다는 지속적이고 정기적인 추적관찰만으로도 충분할 것으로 생각된다도 등은 양군 사이에 유의한 차이가 관찰되지 않았다. 발견 당시 혈청 $C_3$치의 감소는 모두 11명(61.1%)에서 관찰되었는데, 증상군에서는 7명(87.5%), 집단뇨검사군에서는 4명(40%)으로 증상군에서 혈청 $C_3$치의 감소가 보다 현저하였다. 그러나 추적관찰 기간 동안 증상군에서는 7명 중 4명, 집단뇨검사군에서는 4명 중 1명에서 혈청 $C_3$치는 정상범위로 증가하여 최종 관찰시점에서는 6명 (33.3%)에서만 혈청 $C_3$치의 감소가 지속되고 있다. 혈청 $C_3$치의 감소를 보인 경우를 다시 병리조직학적 분류에 의해 세분하여보면 발병당시에는 I형 8명(61.5%), II형에 1명(100%), III형 2명(50%)에서 관찰되었는데, 최종 시점에서는 I형 4명(30.8%), II형 1명(100%), III형 1명(33.3%)이었다. 또한 증상군에서 세포성 반월체형성과 세뇨관위축의 빈도가 높았으며, 사구체 혈관벽 비후와 사구체 간질의 증가의 정도가 집단뇨검사군에 비해 통계적으로 유의하게 높았다. 결론: 무증상성 요이상을 가진 환자에서 신장조직검사 실시 후 MPGN으로 진단되는 증례가 증가하고 있고, 오히려 증상을 동반하는 경우보다 빈도가 증가한다는 사실은 집단뇨 검사에서 소변의 이상소견이 발견되어 신장 조직검사를 실시할 경우 혈청 $C_3$치의 감소 여부에 관계없이 MPGN도 진단적 고려 대상이 되어야 한다고 생각한다.신장 조직검사를 시행한 결과 진행성 경과를 취할 수 있는 막 증식성 사구체 신염과 매우 희귀한 증례인 신유전분증 등으로 진단됨으로써 지속성 단백뇨의 경우 정확 진단적 접근이 필수적임을 알 수