Models Mediation and Moderation Case Study

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Mediation and Moderation

Models, Mediation, and Moderation

Critique of the approach to management and testing of mediator and moderator effects presented in Frazier et al. (2004) article

Frazier et al. (2004)'s article have introduced mediation analysis. After reading the article and comparing it with related ones, I have to raise concerns with about how Frazier et al. (2004) have used his method. I have reviewed recent and past methodological literature and developed a few recommendations on how Frazier et al. (2004) should have addressed three major issues. The first issue is the assumption of omitted variables, temporal order, and reliability. The authors have made brief visits to topics regarding confirmatory exploratory distinction and reliability. Additionally, in the provision of a feeling of the level at which previous literature studies were being practiced, Frazier et al. (2004) examined a sample comprising of 50 articles. Each of these articles had a minimum of analysis of mediation through the regression of ordinary least squares. A significant amount of the articles used exhibit problematic reporting; it appears that there is a room for improvement in carrying out this mediation analysis. Future studies and literature must consider demonstrating the extent at which improvements have been made to this situation (Preacher & Hayes, 2008).

In this article, Frazier et al. (2004) have posed a method commonly referred to as mediation analysis to demonstrate that a set of data is in line with a model whereby an intervening variable demonstrates how an independent variable influences a dependent variable. Studies of investing mediation have focused on understanding the temporal chain of events, which demonstrates how one event influences another. For example, how work environments influence judgments (Baron & Kenny, 1986). In this article, Frazier et al. (2004) presents a sample method based on regression that requires no specialized software that has made great influence. Nevertheless, there are empirical and theoretical reasons for raising concern on how Frazier et al. (2004) have applied this method in assessing mediation.

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The article focuses on the differences between mediation and moderation and with no explanation: it has not included extensive discussions regarding the complexities of structural equation modeling (SEM) and path modeling; these make any mediation analysis be perceived as a special case. Therefore, it is obvious that in Frazier et al. (2004) mediation analysis survey through SEM in his article published in counseling psychology journal, reported problems (Coe, 2000).

Frazier et al. (2004)'s article has a primary purpose of complementing previous literature through making explorations into a series of topics, which have been given a relatively little attention. Arrays of articles about the use of mediation analysis focusing on psychiatric and psychological studies have been published. However, Frazier et al. (2004) have not clarified how long mediation analysis should take in order to influence practice. It appears that we should expect some lag from the process and the article, as well. Therefore, for every topic that Frazier et al. (2004) have addressed some mediation analysis-based literature should document samples of mediation analysis in peer-reviewed journals. I would make recommendations of summarizing previous and current literature, which are likely to be useful in research studies intending to focus on mediation analysis. This should also include researchers interested in exploring future surveys of mediation analysis literature (Frazier, Tix & Barron, 2004).

I can criticize the significant non-significant Frazier et al. (2004) method, although I would promote the redundancy method at the same time. I have not favored the reflective inclusion of the Sobel test, as per the recommendations of ab'test and Holmbeck. I am in support of the application of additional tests based on the utility for a confidential interval to be created or on Type-I error and power rate considerations. In a study carried out on simulation of three categories of indirect influence tests, Frazier et al. (2004) established that no single class of test or one test examined.....

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