I'm working on a meta-analysis. Some studies report $d^\prime$, others report accuracy (hits and false alarms). I would like to transform all the data into the same measure, $d^\prime$ (also $c$). However, for many studies, I only have the mean and sd of the accuracy measures. If I compute $d^\prime$ from the mean hit and false alarms, the outcome is not the same as the mean $d^\prime$, but it is at least closely correlated with mean $d^\prime$. However, I cannot figure out how to figure out the variance of the $d^\prime$ based on the mean and sd of the accuracy data. Is this possible, or am I going to have to request individual subject data?
For repeated measures designs this is unfortunately not solveable. The reason is that those hit and false alarm rates are probably correlated and probably in some unknown way. The papers will not generally report that correlation or any statistic that could be used to derive it. Therefore, the problem cannot be solved.
However, as is typical in many meta-analyses, sometimes a value can be generalized from the papers it is reported in to the ones it is not. In this case you use the mean variance from the papers with d' values and use it as the variance for one where that is not available.