• Journal of Preventive Medicine and Public Health
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• 제56권4호
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• pp.303-311
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• 2023

Traditional mediation analysis, which relies on linear regression models, has faced criticism due to its limited suitability for cases involving different types of variables and complex covariates, such as interactions. This can result in unclear definitions of direct and indirect effects. As an alternative, causal mediation analysis using the counterfactual framework has been introduced to provide clearer definitions of direct and indirect effects while allowing for more flexible modeling methods. However, the conceptual understanding of this approach based on the counterfactual framework remains challenging for applied researchers. To address this issue, the present article was written to highlight and illustrate the definitions of causal estimands, including controlled direct effect, natural direct effect, and natural indirect effect, based on the key concept of nested counterfactuals. Furthermore, we recommend using 2 R packages, 'medflex' and 'mediation', to perform causal mediation analysis and provide public health examples. The article also offers caveats and guidelines for accurate interpretation of the results.

• 한국안전학회지
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• 제39권1호
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• pp.114-122
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• 2024

This study aimed to identify the multiple mediation effects of job satisfaction and job commitment on the relationships between job stress and workers' safety behavior in terms of compliance and participation, in which the multiple mediation effects are a hybrid of parallel and serial mediating relationships. The multiple mediation model was analyzed using the bootstrapping method through the PROCESS macro tool in SPSS. The results showed that job stress negatively affects job satisfaction, job commitment, and workers' safety behavior, and the relationship between job stress and safety behavior is mediated by both job satisfaction and job commitment. The serial mediation effects of job satisfaction and job commitment were also found to be statistically significant in the regression relationship between job stress and safety behavior. Further analysis of the compliance and participation subdimensions of safety behavior showed similar results. Specifically, the serial mediation effects of job satisfaction and job commitment on participation and compliance behavior were further supported; however, the mediation effect of job satisfaction was not significant, whereas that of job commitment did remain significant. Further research is needed to determine if the mediation effect of job satisfaction found in this study can be extended and generalized to workers in various fields and industries.

• 한국중재학회지:중재연구
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• 제31권2호
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• pp.77-98
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• 2021

International commercial mediation of intellectual property rights fully meets the interests of the parties in such disputes in terms of their needs for neutral forum of dispute resolution, cost-effective settlement, objective opinion of relevant experts, internationally enforceable solution. In addition, as a procedural flexibility, respected self-determination of the parties, exploration of possible creative business solutions, maintenance of business relationship and confidentiality of mediation are major characteristics which can be competitively differentiated from the lawsuit or arbitration. The settlement agreement as a result of the WIPO mediation has an effect of contract while the settlement agreement as a result of most domestic ones has an effect of judicial reconciliation which can be domestically enforced. The latter is not subject to the application of the Singapore Convention on Mediation which establishes a harmonized legal framework for the right to invoke settlement agreements as well as for their enforcement. The WIPO international mediation system and its experience may be a good reference for Korea to take an initiative to establish a globally competitive international mediation system in the area of intellectual property rights.

• Human Ecology Research
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• 제54권3호
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• pp.293-305
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• 2016

This study examines the mediation effect of teacher-child interactions in the process of the impact of teacher's teaching-efficacy on childhood education institutions and classroom environment on peer-play interactions. We used data from 970 children aged between 49 and 55 months and 970 homeroom teachers from the fifth Korean Child Panel (2012) of the Korea Institute of Child Care and Education. The model fitness was excellent after data were statistically analyzed with model of structure to testify the relationship and effect among teaching efficacy, classroom environment, teacher-child interactions, and peer-play interactions. First, the analysis also showed that the teacher's teaching efficacy did not influence peer-play interactions directly, but gave an indirect effect on the peer-play interactions with the mediation of the teacher-child interactions. Second, the classroom environment directly and indirectly influenced the peer-play interactions with the mediation of the teacher-child interactions. Third, the variable of teacher-child interactions was fully effective as a mediating variable in the process of the teaching efficacy and classroom environment influence on teacher-child interactions. Teaching efficacy and classroom environment influenced the peer-play interactions through the mediation of the teacher-child interactions. The significance of mediation effect of the teacher-child interactions was verified through a bootstrapping method.

• 한국콘텐츠학회논문지
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• 제17권5호
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• pp.449-460
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• 2017

본 연구는 카지노 딜러의 감정노동과 우울과의 관계에서 적대감의 매개효과와 감정표현불능증의 조절효과가 나타나는 조절된 매개효과가 유의한지 확인하고자 하였다. 본 연구에서는 서울 소재 외국인 전용 카지노 딜러 160명(남 56명, 여 94명)을 대상으로 감정노동, 감정표현불능증, 적대감, 우울에 관한 설문을 실시하였다. 본 연구는 조절된 매개효과를 검증하기 위해 SPSS 22.0의 SPSS Macro를 사용하였다. 분석결과로 첫째, 카지노 딜러의 감정노동의 강도가 높아질수록 우울이 높아지는 모습이 나타났으며, 적대감은 감정노동과 우울을 부분매개하는 것으로 나타났다. 둘째, 조절효과 검증 결과, 감정노동과 감정표현불능증, 적대감과 감정표현불능증이 상호작용하여 우울에 영향을 미치는 것으로 나타났다. 셋째, 조절된 매개효과를 검증한 결과, 감정노동이 적대감을 통하여 우울에 영향을 미치는 과정을 감정표현불능증이 조절하는 조절된 매개효과가 유의미하였다. 논의에서 본 연구의 의의로 카지노 딜러들의 감정노동을 지원하는 방안에 대한 제언을 기술하였다.

• Safety and Health at Work
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• 제11권2호
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• pp.222-227
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• 2020

Background: This study investigated the effect of increased job stress, caused by musculoskeletal disease (MSD) among firefighters, on a firefighter's intention to leave the profession, henceforth referred to as "turnover intention," and verified the moderating effect of mindfulness on such a relationship. Methods: A survey involving a total of 549 Korean male firefighters as participants was conducted herein, and the following results were obtained: the mediation effect of the MSD to turnover intention through job stress was confirmed, and the indirect effect of job stress was verified. Results: We verified the moderated mediation effect of mindfulness on the relation:MSD, job stress, and turnover intention. The conditional indirect effect for middle and high levels of mindfulness is significant. Conclusion: The result of this study is supported by proofs of the relationship between a firefighter's MSD, job stress, and turnover intention, and these case studies reveal the moderated mediation effect of dispositional mindfulness.

• 무역상무연구
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• 제66권
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• pp.171-190
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• 2015

This thesis mainly studies the Commercial Mediation System in China and its Implications to Korea. Commercial mediation is an important dispute settlement method, however there are more studies on the issues of arbitration than the ones on mediation. Commercial mediation emerges From the tide of economic activity, needing an earnest research and to be developed. Business mediation law has been enacted in some nations like USA, but in Korea, there is no law in mediation field to follow. To set up business mediation law is necessary and urgent as well as feasible. This thesis first introduces the mediation of the general meaning including concept, makes a research concerning the sorts of the mediation, compares the effect of different kinds of mediation, and studies the current status of use of mediation in other countries. Than introduces current status of use of mediation in China, and examine mediation system in China. Through this studies, the writer no that there is almost equal problem in China comparing to Korea. So than examine how Chinese government make countermeasures to cover their problems, and give Korean government several implications that can learn from China.

• Journal of the Korean Data and Information Science Society
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• 제28권3호
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• pp.669-684
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• 2017

Mediation models are widely used in many fields of research and have recently gained attention in epidemiology. The mediation proportion is a standard measure to evaluate what part of the total exposure effect on an outcome may be explained by a particular mediator and to examine how important that pathway is relative to the overall exposure effect. A common question is how large a sample size is needed to achieve high statistical power or, equivalently, what magnitude of effect can be detected. Current power and sample size calculations for mediation analysis are limited and additional research is needed. We therefore propose a computer-intensive power analysis using the mediation proportion. We conduct simulation studies to calculate statistical powers and sample sizes. And then, we illustrate our power analysis using an example from the Adult Health Study of atomic-bomb survivors and demonstrate that the method is relatively straightforward to understand and compute.

• Human Ecology Research
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• 제56권5호
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• pp.461-472
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• 2018

Using a sample of third grade middle school students from the forth wave of Children and Youth Panel Survey in 2012, the mediation effects of private educational expenditure between parenting styles and children's academic performance were investigated by applying factor, cluster, tobit, and two stage regression analysis. The major results were as follows. First, four types of parenting style were identified. The most frequent parenting style was ambivalent parenting (tiger parenting) which was followed by authoritative parenting. Second, compared to permissive parenting style, ambivalent, authoritative, and authoritarian parenting styles were significantly associated with more private educational expenditures. Third, more private educational expenditures were significantly associated with higher academic performance of children. I found both a full mediation effect of private educational expenditure for ambivalent and authoritarian parenting styles, and a partial mediation effect for authoritative parents. Authoritative parenting style has a negative moderating effect on the relationship between household income and private educational expenditure, along with a positive direct effect on the academic performance of children. The results suggested that an authoritative parenting style was related with higher academic performance of children with less private educational expenditures compared to other parenting styles. The results also implied that the public policies to enhance authoritative parenting style among parents would be effective to reduce household's private educational expenditures.

• 지식경영연구
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• 제20권2호
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• pp.1-24
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• 2019

This tutorial introduces procedures and methods for performing structural equation modeling using R. To do this, we present advanced analysis methods based on structural equation model such as mediation effect analysis, moderation effect analysis, moderated mediation effect analysis, and multiple-group analysis with R program code using R lavaan package that supports structural equation modeling. R is flexible and scalable, unlike traditional commercial statistical packages. Therefore, new analytical techniques are likely to be implemented ahead of any other statistical package. From this point of view, R will be a very appropriate choice for applying new analytical techniques or advanced techniques that researchers need. Considering that various studies in the social sciences are applying structural equations modeling techniques and increasing interest in open source R, this tutorial is expected to be useful for researchers who are looking for alternatives to existing commercial statistical packages.