Dear list,I have a question regarding the link between p-values and standard errors : two of the studies I want to use for a meta analysis using slopes as the effect size report an estimate of the slope but do not report either the variance or the standard error associated with it.The studies give the degrees of freedom, correlation, and p-value.I think I should be able to retrieve the number of observations from the degrees of freedom,but I don't know if I can retrieve a standard error from simply the p-value and df, and I have not been taught a way to do so.Is there a way for me to get a standard error for the slope from thesemetrics ?Thank you,Norman