Statistical power analysis and sample size planning for moderated mediation models.
Behav Res Methods
; 2024 Feb 02.
Article
in En
| MEDLINE
| ID: mdl-38308148
ABSTRACT
Conditional process models, including moderated mediation models and mediated moderation models, are widely used in behavioral science research. However, few studies have examined approaches to conduct statistical power analysis for such models and there is also a lack of software packages that provide such power analysis functionalities. In this paper, we introduce new simulation-based methods for power analysis of conditional process models with a focus on moderated mediation models. These simulation-based methods provide intuitive ways for sample-size planning based on regression coefficients in a moderated mediation model as well as selected variance and covariance components. We demonstrate how the methods can be applied to five commonly used moderated mediation models using a simulation study, and we also assess the performance of the methods through the five models. We implement our approaches in the WebPower R package and also in Web apps to ease their application.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Behav Res Methods
Journal subject:
CIENCIAS DO COMPORTAMENTO
Year:
2024
Type:
Article
Affiliation country:
United States