• Title/Summary/Keyword: Sobel-test

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Development of a Fruit Sorting System using Statistical Image Processing (통계적 영상처리를 이용한 과일 선별시스템 개발)

  • 임동훈
    • The Korean Journal of Applied Statistics
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    • v.16 no.1
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    • pp.129-140
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    • 2003
  • This study was to develop a fruit sorting system using statistical image processing. Histogram was used to compare fruit colors to standard fruit color and edge detector using Wilcoxon test was used to calculate an accurate geometrical characteristics of fruit including perimeter, area, major axis and minor axis length and roundness. The experimental result obtained from using our system for sorting apples was presented.

Factors Influencing Subjective Happiness in Korean Nursing Students (간호대학생의 주관적 행복감에의 영향요인)

  • Kim, Eun Man;Yang, Young Hee;Lee, Haeyoung;Yu, Mi
    • The Journal of Korean Academic Society of Nursing Education
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    • v.22 no.3
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    • pp.294-303
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    • 2016
  • Purpose: The purpose of this study was to determine subjective happiness related factors in Korean nursing students. Methods: A purposive sample of 200 nursing students was recruited for the cross-sectional survey design. The instruments were perceived stress scale, major satisfaction scale, resilience scale, and subjective happiness scale. Data were analyzed using descriptive statistics, hierarchical linear regression, and the Sobel test for testing mediating effects. Results: The mean score of stress, major satisfaction, resilience and subjective happiness was 2.21, 3.95, 3.60 and 5.03, respectively. Perceived health status, stress_positive perception, stress_negative perception, resilience_self confidence, resilience_positivity, resilience_social support had significant effects on subjective happiness. Explained variance for the subjective happiness was 53.4%. Resilience had a partial mediating effect in the relationship between stress and subjective happiness (Sobel test: Z=-5.67, p<.001). Also, resilience had a mediating effect in the relationship between major satisfaction and subjective happiness (Sobel test: Z=5.65, p<.001). Conclusion: Based on the findings of this study, nursing intervention programs focusing on improving resilience are recommended to improve subjective happiness in nursing students.

Smartphone Addiction and Depression: The Mediating Effects of Self-esteem and Resilience among Middle School Students (중학생의 스마트폰 중독과 우울: 자아존중감과 적응유연성의 매개효과)

  • Park, Hyejung;Choi, Eunsuk
    • Research in Community and Public Health Nursing
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    • v.28 no.3
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    • pp.280-290
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    • 2017
  • Purpose: The aim of this research is to examine the moderating effects of self-esteem and resilience in the relationship between smartphone addiction and depression among middle school students. Methods: Data were collected from 324 middle school students in D City during the period of July 1st-17th, 2015. Multiple regression analysis, the Baron & Kenny's mediation verification, and Sobel test were conducted to measure the mediating effects of self-esteem and resilience on depression. Results: There were significant correlations among the variables; smartphone addiction, self-esteem, resilience, and depression. Self-esteem had a complete mediating effect (${\beta}=-.40$, p<.001) in the relationship between smartphone addiction and depression (Sobel test: Z=4.68, p<.001). Resilience had a partial mediating effect (${\beta}=-.15$, p<.001) in the relationship between smartphone addiction and depression (Sobel test: Z=2.40, p<.001). Conclusion: This study suggests to apply self-esteem and resilience in developing nursing intervention programs for adolescent depression caused by smartphone addiction.

Effects of Anger and Entrapment on Psychological Health of High School Boys: Focused on the Mediating Effects of Social Support (남자 고등학생의 분노 및 속박감이 정신건강에 미치는 영향: 지각된 사회적 지지의 매개효과를 중심으로)

  • Yang, Sun Yi;Oh, Yun Hee
    • Child Health Nursing Research
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    • v.23 no.4
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    • pp.429-439
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    • 2017
  • Purpose: The aim of this study was to identify the status of psychological health among boys in high school and to examine the mediating effects of social support on the relationship between anger and entrapment on psychological health. Methods: The participants in this study were 193 high school boys from Jeju. Measurements included state-trait anger expression inventory, entrapment scale, student social support scale, and questionnaires to assess mental and physical health. Data were analyzed using independent t-test, one-way ANOVA, $Scheff{\acute{e}}$ test, Pearson correlation coefficient, simple and multiple regression techniques with the SPSS 21.0. Mediation analysis was performed with the Baron and Kenny's method, and Sobel test. Results: Mean scores for anger experience, entrapment, social support, and psychological health were $29.81{\pm}7.34$, $34.09{\pm}16.33$, $45.75{\pm}7.02$, $22.51{\pm}9.91$, respectively. There was a significant correlation between anger experience and psychological health. Entrapment was significantly correlated with psychological health. Social support showed partial mediating effects in the relationship between anger experience and psychological health (Sobel test: Z=54.18. p<.001). Social support showed partial mediating effects in the relationship between entrapment and psychological health (Sobel test: Z=2.24. p=.025). Conclusion: The results indicate a need to develop social support programs for boys in high school.

Effect of Social Participation Influencing Elderly's Suicidal Ideation (사회참여가 노인 자살생각에 미치는 영향 -사회적 지지와 자기효능감의 매개효과를 중심으로-)

  • Jeong, Il-Young
    • The Journal of the Korea Contents Association
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    • v.13 no.9
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    • pp.164-177
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    • 2013
  • This study's aim was to attest social support and self-efficacy's mediation effects in the path which social participation affected to elderly's suicidal ideation. Analysis data were Seoul Welfare Panel Data 2th wave(2010). A total of 1,429 cases aged over 65 were used for this study. Analysis method was AMOS 18.0's Structural Equation Modeling, and sobel test was used for attesting mediation effects's significance degree. Analysis results had established that measurement model and structural model's fit was favorable, and all path coefficients had significance degree. Therefore, this model was suitable for this study. Also this results had proved that this study's model was full mediation model, and it means that if mediation variables controlled, and then direct effect was excluded. And analysis results confirmed social support and self-efficacy' mediation effect had significance, by using a sobel test. Based on analysis results, this study suggested the importance of relationship between secondary group and individual, and presented intervention plans.

The influence of Ego-Resilience on Self-Leadership in Nursing Students: Mediating Effect of Critical Thinking Disposition (간호대학생의 자아탄력성이 셀프리더십에 미치는 영향: 비판적 사고성향의 매개효과)

  • Hye-Suk Kim;Mi-Hwa Park;Eun-Young Choi
    • The Journal of the Convergence on Culture Technology
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    • v.9 no.6
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    • pp.329-337
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    • 2023
  • This study investigated the mediating effect of critical thinking disposition on the relationship between ego resilience and self-leadership of nursing students. The subjects of the study were 193 third-year and fourth-year nursing students from three universities in G Province, and data were collected from November 1 to November 19, 2021. The collected data were subjected to descriptive statistics, t-test, ANOVA, Pearson's correlation, and multiple regression using the SPSS/WIN 23.0 program. The mediation effect was analyzed using Baron and Kenny's three-step procedure, and the statistical significance of the mediation effect was verified using the Sobel test. As a result of this study, self-leadership was positively correlated with ego resilience(r=.43, p<.001) and critical thinking disposition(r=.51, p<.001), and ego resilience was positively correlated with critical thinking disposition(r =.58, p<.001). It was found that there was a partial mediating effect of critical thinking disposition in the relationship between ego resilience and self-leadership(Sobel test: Z=5.05, p<.001). Therefore, in order to increase the self-leadership of nursing students, an integrated approach is needed to improve ego resilience and critical thinking disposition.

An Efficient Edge Detection Using Van der Waerden′s Statistic in Images (Van der Waerden의 통계량을 이용한 영상에서의 효율적인 에지검출기법)

  • 최명희;이호근;김주원;하영호
    • Proceedings of the IEEK Conference
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    • 2002.06d
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    • pp.215-218
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    • 2002
  • The edges of an image hold much of the information in that image. The edges tell where objects are, their shape and size, and something about their texture. An edge is where the intensity of an image moves from a low value to a high value. We introduce the edge detection using the differential operator with Sobel operator and describe a nonparametric Wilcoxon test based on statistical hypothesis testing for the detection of edges. This paper proposes an efficient edge detection using Van der Waerden's statistic in original and noisy images. We use the threshold determined by specifying significance level a and an edge-height parameter. Comparison with our statistical test and Sobel operator shows that Van der Waerden method perform more effectively in both noisy and noise-free images.

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The Effect of the Interest in the Latest Technology of the 4th Industrial Revolution among Workers at Welfare Institutions for the Disabled on the Resistance and Anxiety : The Mediating Effect of Acceptance of the Latest Technology (장애인복지기관 종사자의 4차산업혁명 최신기술 관심도가 최신기술 활용 저항도와 불안도에 미치는 영향: 최신기술 수용도의 매개효과를 중심으로)

  • Nam, Hee-Eun;Im, Yu-Jin;Baik, Jeong-Won;Kim, Nam-Sook;Yoon, Young-Ji
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.22 no.5
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    • pp.188-198
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    • 2021
  • The purpose of this study is to verify the mediating effect from acceptance of the latest 4th Industrial Revolution technologies on the relationships between interest in the latest technologies, resistance to the latest technologies, and anxiety in workers at welfare institutions for the disabled. In order to achieve this goal, data were collected from July to August 2018 from workers at disability welfare centers in P Metropolitan City, and we analyzed data from 187 persons. Multiple regression analysis was applied to test the causal relationships between variables; the step-by-step analysis model of Baron and Kenny (1986) was used to verify mediating effects, and the Sobel test was performed to verify their significance. The analyses verified that the degree of interest in the latest technologies affects the degree of resistance to, and anxiety over, the latest technologies through acceptance of the latest technologies. At the same time, we verified that the degree of interest had a complete mediation effect because it did not directly affect the acceptance. In addition, the Sobel test result showed that the mediating effect was statistically significant. In other words, it was found that the degree of interest in the latest 4th Industrial Revolution technologies from workers at welfare institutions for the disabled increases the possibility of adaptation to future society by lowering resistance and anxiety through acceptance of the latest technologies. Based on these results, a plan to reduce resistance to, and anxiety over, the latest technologies was sought, and related measures to increase interest in the latest technologies and their acceptance are suggested.

The Mediating Effects of Family Solidarity on Depression and Suicidal Ideation of Older Adults in Korea (노인의 우울이 자살생각에 미치는 영향에 대한 가족연대감의 매개효과)

  • Yoon, Hyun-Sook;Yeom, So-rim
    • Korean Journal of Social Welfare
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    • v.68 no.1
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    • pp.53-71
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    • 2016
  • This study, we analyzed the following in order to verify the effects of depression on suicidal ideation. First, correlations among depression, family solidarity and suicide variables were analysed. Second, the hierarchical regression analysis was conducted to examine the effects of suicidal ideation. Third, family solidarity Sobel-test was performed to investigate whether family solidarity mediates the link between depression and suicidal ideation. The data used in the study comes from the survey conducted by Hallym Aging Research Institute in 2014. Through stratified multi-stage random sampling, 2,034 individuals aged 65 and over and living in Chun-cheon city were analysed. The result with depression and family solidarity together shows the higher the level of depression is, the more suicide ideation is. which means depression has a direct impact on suicide ideation. In addition, it indicates the higher family solidarity is, the less suicide ideation is. Sobel-test which examines indirect effects of depression on suicidal ideation through family solidarity produces a statistically meaningful result. The result is family solidarity mediates the link between depression and suicidal ideation.

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Mediation Effect of Cognitive Emotion-regulation Strategy in the Relationship between Family Stress and Marital Satisfaction -focused on the comparison of husbands and wives- (중년기 부부의 가족스트레스와 결혼만족도 관계에서 인지적 정서조절전략의 매개효과 -남편과 아내의 비교를 중심으로-)

  • Kim, Du-Gil;You, Young-Dal
    • The Journal of the Korea Contents Association
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    • v.15 no.11
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    • pp.177-191
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    • 2015
  • This study was designed to investigate the differences in the mediation effects of cognitive emotion-regulation in the relationships between family stress and marital satisfaction of middle-aged husbands and wives. The data were underwent through the SPSS 19. Win for frequency, paired-t-test, multiple regression analysis, and for the further analysis of hiearchical multiple regression and the analysis for the mediation effect proposed by Baron & Kenny(1996) and Sobel test(Sobel, 1982). The results were as follows. First, hiearchical multiple regression analysis showed that education level, couples' problems, replanning strategies were proved to be significant for the marital satisfaction of the husbands, while age, couples' problems, acceptance strategies were significant for the marital satisfaction of the wives. Second, cognitive emotion-regulation strategies were proved to partially mediate in the relationship between family stress and marital satisfaction. The limitations of the study and implications for the further research were discussed based on the results.