Meta-analysis with complex research designs: dealing with dependence from multiple measures and multiple group comparisons

Calculating Mean Effects From Studies With Multiple Measures

1. The measure that yielded the highest effect size was selected for each independent group comparison.

2.A measure was selected at random using a random number generator for each independent group comparison.

3.A measure was selected for each independent group comparison that seemed to best present the primary focus of the study's intervention.

4.Measures were analyzed separately based on the type of reading skill measured (fluency, vocabulary, spelling, reading comprehension, word, and word fluency) for each independent group comparison and mean effects were calculated for each skill).

5. All measures were treated as independent estimates of effects for each independent group comparison.