• Journal of the Korean Statistical Society
• /
• v.34 no.3
• /
• pp.209-218
• /
• 2005

In response surfaces analysis, we often proceed by supposing that, over a limited region of factor space, a polynomial of only first or second degree might adequately approximate the true function. To find the best subset model, all possible quadratic regressions for response surfaces can be very valuable to get optimum solutions under some reasonable experimentations. However, there is a very hard computational burden to get all possible quadratic regressions. In practice, it is sufficient to consider only hierarchical models. In this paper, we propose an algorithm to get all possible hierarchical quadratic regressions for fitting response surfaces.

• The Journal of the Korea Contents Association
• /
• v.17 no.1
• /
• pp.522-531
• /
• 2017

The purpose of this study was to explore the relationship between partner violence and depression in the elderly. This secondary analysis study used the data from 2015 Korean Welfare Panel Study. A total of 2,819 older adults who completed the survey about demographic characteristics, health-related characteristics, satisfaction in the relationship with children, satisfaction in social relationship, partner violence, and depression. Data were analyzed with SPSS 23.0 by using descriptive analyses, independent t-tests, $x^2$-tests, bivariate logistic regressions, and hierarchical logistic regressions. In the results of hierarchical logistic regressions, after controlled demographic and health related characteristics, satisfaction in the relationship with children, and satisfaction in social relationship, partner violence was significantly associated with depression in both male and female older people. In conclusion, it is important to make a prevention program to reduce partner violence and depression for not only female but also male older adults.

• Korean Journal of Human Ecology
• /
• v.22 no.4
• /
• pp.525-537
• /
• 2013

This study investigated the relations among a child's emotionality, mother's depression and parenting behaviors in predicting a child's happiness. Participants were 384 children(175 boys, 209 girls) and their mothers. The teachers completed the rating scale to measure a child's happiness. A child's emotionality, mother's depression and parenting behaviors were assessed by a mother-reported questionnaire. The collected data was analyzed using descriptive statistics, correlations, and hierarchical multiple regressions. Results showed that child's emotionality was negatively related to their happiness. Mother's depression had a negative relation to child's happiness. Mother's warmth-encouragement, overprotection-permission, and reject-nonintervention was significantly related to a child's happiness. Hierarchical regression analysis indicated that the interaction of child's emotionality and mother's reject-nonintervention predicted child's happiness. Child's emotionality, whose mother demonstrated a higher level of reject-nonintervention, was associated significantly with happiness. In addition, the association between mother's depression and child's happiness was mediated by mother's warmth-encouragement and reject-nonintervention. Results suggest the importance of mother's role in the context of intervention planning for child's happiness.

• Journal of Fisheries and Marine Sciences Education
• /
• v.27 no.5
• /
• pp.1252-1264
• /
• 2015

This study examined the moderating and mediating effects of teacher-child conflict relationship among child's language ability, emotional regulation and peer victimization. The participants were 152 children(77 boys, 75 girls) and 14 preschool teachers. The teachers completed rating scales to measure the child's emotional regulation, peer victimization and teacher-child relationship. Child's language ability was assessed by researcher using PRES(Preschool Receptive-Expressive Language Scale). The collected data were analyzed using Pearson correlations and hierarchical multiple regressions. Results showed that peer victimization was related to child's language ability, emotional regulation and teacher-child relationship. Hierarchical aggression analysis indicated that the interaction of child's receptive language ability and teacher-child conflict relationship predicated peer victimization. Child's language ability, whose demonstrated a lower teacher-child conflict relationship, was significantly with peer victimization. In addition, the association between a child's emotional regulation and peer victimization was partially mediated by teacher-child conflict relationship.

• Korean Journal of Human Ecology
• /
• v.22 no.3
• /
• pp.391-404
• /
• 2013

This study examined the moderating role of teacher-child relationship on the relation between children's problem behavior and peer victimization. Participants were 198 children(97 boys, 101 girls; recruited from classes with 5-6 year olds) and their kindergarten teachers. The teachers completed the rating scales to measure the children's peer victimization, problem behavior and teacher-child relationship. The collected data were analyzed using descriptive statistics, t-tests, correlations, and hierarchical multiple regressions. Boys and girls were analyzed separately. Results showed that children's problem behavior had positive relation to their peer victimization. Teacher-child relationship significantly related to children's peer victimization. Hierarchical regression analysis indicated that the interaction of boys' withdrawal behavior and teacher-child closeness predicted boy's peer victimization. Boys' withdrawal behavior, whose teachers demonstrated the lowest level of teacher-child closeness, associated significantly with their peer victimization. Boys' withdrawal and aggressive behavior had significant relation to their peer victimization, especially for the highest level of teacher-child conflictual relationship. Findings suggested the importance of teacher-child relationship in the context of intervention planning for peer victimization.

• The Korean Journal of Health Service Management
• /
• v.14 no.1
• /
• pp.1-14
• /
• 2020

Objectives: This study examined factors influencing hospital workers' perception of patient safety culture, job boredom and job crafting in reporting of safety compliance. Methods: Structured questionnaires were used to collect data from 245 hospital workers who were full-time staff for six months or more. Data were analyzed using descriptive statistics, t-test, ANOVA, Pearson correlation coefficients and hierarchical multiple regressions with SPSS/WIN version 22.0. Results: The mean score for perception of patient safety culture was 3.16±0.32, for job boredom was 2.52±0.52, for job crafting was 3.35±0.49 and for degree of safety compliance was 2.87±0.3. The hierarchical multiple analysis revealed that hospital work environment (β=.27, p<.001), communication process (β=.27, p<.001) of subarea perception of patient safety culture and cognitive crafting (β=.15, p=.039) of subarea job crafting were predictive of patient safety compliance (R2=.47, p<.001). Conclusions: The findings indicate that perception of patient safety culture and job crafting are important factors to be considered in working to improve hospital workers' safety compliance. Therefore, education and systematic programs to improve perception of patient safety culture and job crafting should be developed.

• Journal of the Korean Home Economics Association
• /
• v.50 no.5
• /
• pp.13-24
• /
• 2012

This study examined the effects of mothers' reactions toward children's negative emotion as well as mothers' emotional expressivity on children's social withdrawal. 206 children (103 boys, 103 girls; aged 4-5 years old) and their mothers participated in the study. Mothers reported their reactions to their child's negative emotion along with their expressivity. The teachers completed a rating scale to measure children's social withdrawal. The collected data was analyzed using descriptive statistics, Pearson's productive correlation coefficient, and hierarchical multiple regressions. The results showed a relation between mothers' distress reactions and punitive responses and children's social withdrawal. A mother's positive expressivity was negatively related to a child's social withdrawal. A hierarchical regression analysis indicated that the effects of mothers' punitive responses and minimization responses on children's withdrawal were moderated by a mother's positive expressivity. Mothers' punitive responses and minimization responses were positively associated with children's social withdrawal, especially for children who had the lowest level of mother's positive expressivity.

• Management Science and Financial Engineering
• /
• v.13 no.1
• /
• pp.73-91
• /
• 2007

We investigate factors that influence the choice of high-share brands(HSBs) vs. low-share brands(LSBs) among various product and consumer characteristics related to brand-share perceptions. Specifically, using 8 product categories varying in terms of purchase decision involvement, we show how the influencing factors vary across the categories. At the general level that cover all the 8 categories, our hierarchical Bayesian regressions analysis shows that factors that favor high-share brands are purchase decision involvement, search goods, experience goods, price-quality relationship, positive network externalities, and price-prestige beliefs. Conversely, consumers who value variety seeking and need for uniqueness favor low-share brands. The effects of these factors, however, vary across product categories. The identification of these characteristics can help brand managers establish a more effective brand-share strategy in such areas as setting an optimal market share goal, extending a brand, and developing ad copy. Furthermore, our consumer segmentation analysis demonstrates the general market has two distinct segments - (1) a segment composed of HSB buyers(86%) and (2) a segment composed of LSB buyers(14%). The two segments are also shown to have different significant factors that explain their brand choice. Our segmentation analysis can help marketers establish a marketing strategy that targets a specific segment of interest.

• The Journal of Asian Finance, Economics and Business
• /
• v.8 no.7
• /
• pp.215-224
• /
• 2021

This article emphasizes the consequences of exploring the relationship between sustainable development practices and non-financial performing factors. Also, it investigates the combined effects of the transformational leadership style on the relationship between sustainable development practices and non-financial performing factors. Using primary data sources, this study reviews the literature on the relationship between the factors of the effectiveness of sustainable development practices of Jordanian contractors and non-financial performance. A total of 290 questionnaires were personally distributed to contractors in the Amman district in Jordan. Only 253 questionnaires were returned and usable for further analysis, which represents a response rate of 87%. Data was collected from October 2020 until April 2020. Hypotheses were tested through multiple regression analysis, and hypotheses for interacting effect were examined through hierarchical multiple regression analysis. Based on the results of the analysis obtained there is a significant effect on the relationship between sustainable development and non-financial performances. It shows that construction companies involved in sustainability practices will able to improve their performance, which contributed significantly toward the overall firm's performance. Whereas, results from hierarchical multiple regressions showed that transformational leadership had no moderation effect on the non-financial performance in such a way that reaches a higher firm performance level.

• Korean Journal of Child Studies
• /
• v.26 no.5
• /
• pp.105-121
• /
• 2005

Data were collected from 120 teachers at 67 childcare centers in Seoul and Kyunggi-Do. The Assessment Scale for Day Care Programs(Rhee et ai., 2003) was used to observe teachers' interaction behaviors. Subjects responded to the teachers' job stress scale developed by the author and a modified version of teachers' efficacy scale based on the Science Teaching Efficacy Belief Instrument(Enochs & Riggs, 1990). Data were analyzed with descriptive statistics, Pearson correlations, and hierarchical regressions. Results showed that quality of teachers' interaction behaviors correlated negatively with teachers' job stress, and positively with teachers' personal efficacy; teachers' belief of efficacy moderated the relationship between job stress and teachers' interaction behaviors.