Ali Zia-Tohidi

4 Questions 18 Answers 0 Followers

Questions related from Ali Zia-Tohidi

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 4,677 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 1,929 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 4,414 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 6,018 4 View