Compute the pooled standard deviation for SMD. It computes the pooled SD for 2 or 4 groups depending on the arguments passed. Simple SMD has only 2 groups, while main and interactions had 4 groups.
.pooled_sd(
Ctrl_sd,
Ctrl_n,
A_sd,
A_n,
B_sd = NULL,
B_n = NULL,
AB_n = NULL,
AB_sd = NULL
)Standard deviation from the control treatment
Sample size from the control treatment
Standard deviation from the A treatment
Sample size from the A treatment
Standard deviation from the B treatment
Sample size from the B treatment
Sample size from the interaction AxB treatment
Standard deviation from the interaction AxB treatment
Morris, W. F., Hufbauer, R. A., Agrawal, A. A., Bever, J. D., Borowicz, V. A., Gilbert, G. S., ... & Vázquez, D. P. (2007). Direct and interactive effects of enemies and mutualists on plant performance: a meta‐analysis. Ecology, 88(4), 1021-1029. https://doi.org/10.1890/06-0442