Ali Zia-Tohidi

6 Questions 22 Answers 0 Followers

Questions related from Ali Zia-Tohidi

Can I include the cross-loadings between indicators of predictors and outcomes in an ESEM model?

I want to perform a mediation analysis in the context of ESEM (specifically, ESEM-within-CFA). My understanding of my dataset was that I must include the cross-loadings between all variables in...

20 April 2023 2,013 3 View

How to detect the source of collinearity in EFA?

In the context of regression, methods for detecting collinearity are well described in the literature. In the context of exploratory factor analysis (EFA), however, I am facing a situation where I...

16 March 2023 8,318 6 View

Second-order factor analysis: To include subscales (first-order factors) as observed indicators or as latent variables?

In evaluating second-order structure, I have faced two common approaches in applied studies: 1) Some fit the second-order structure in an explicitly hierarchical model: the first-order structure...

08 December 2022 4,686 5 View

Multilevel meta-analysis: Any packages or functions for calculating I-squared and R-squared?

For the three-level meta-analysis, the package "dmetar" provides a function that calculates the I^2 (dmetar::var.comp()). But, this function only works for three-level models. Is there any package...

17 March 2022 1,938 6 View

Structure of the residual covariance matrix in a model with multilevel within-subject factors?

Hello, I have a dataset with a three-level structure. Participants reported an outcome of interest for 3-4 aspects of an incident, and they reported 4 types of incidents (1 incident for each...

10 February 2021 4,438 3 View

Calculating cohen's d from ANCOVA: what is R in the formula?

Cohen's d can be calculated from ANCOVA, using the following formula (presented in Borenstein M. Effect sizes for continuous data. In: The Handbook of Research Synthesis and Meta-Analysis. 2nd ed....

22 March 2020 6,026 4 View