Mediation and Recommendations

Mediation and recommendations.

Mediation in experimental and nonexperimental studies: new procedures and recommendations.

Mediation is said to occur when a causal effect of some variable X on an outcome Y is explained by some intervening variable M. The authors recommend that with small to moderate samples, bootstrap methods (B. Efron & R. Tibshirani, 1993) be used to assess mediation. Bootstrap tests are powerful because they detect that the sampling distribution of the mediated effect is skewed away from 0. They...

Mediation Analysis in Social Psychology: Current Practices and New Recommendations

A key aim of social psychology is to understand the psychological processes through which independent variables affect dependent variables in the social domain. This objective has given rise to statistical methods for mediation analysis. In mediation analysis, the significance of the relationship between the independent and dependent variables has been integral in theory testing, being used as ...

Conceptualizing and testing random indirect effects and moderated mediation in multilevel models: new procedures and recommendations.

The authors propose new procedures for evaluating direct, indirect, and total effects in multilevel models when all relevant variables are measured at Level 1 and all effects are random. Formulas are provided for the mean and variance of the indirect and total effects and for the sampling variances of the average indirect and total effects. Simulations show that the estimates are unbiased under...

Mediation and Software Maintenance

This paper reports on recent work and directions in modern software architectures and their formal models with respect to software maintenance. Related earlier work, now entering practice, provides automatic creation of object structures for customer applications using such models and their algebra, and we will summarize that work. Our focus on maintenance intends to attack the most costly and ...