naa a22 4500 510777562 CHVBK 20180411083235.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.3758/s13428-012-0261-6 doi (NATIONALLICENCE)springer-10.3758/s13428-012-0261-6 Three-level meta-analysis of dependent effect sizes [Elektronische Daten] [Wim Van den Noortgate, José López-López, Fulgencio Marín-Martínez, Julio Sánchez-Meca] Although dependence in effect sizes is ubiquitous, commonly used meta-analytic methods assume independent effect sizes. We describe and illustrate three-level extensions of a mixed effects meta-analytic model that accounts for various sources of dependence within and across studies, because multilevel extensions of meta-analytic models still are not well known. We also present a three-level model for the common case where, within studies, multiple effect sizes are calculated using the same sample. Whereas this approach is relatively simple and does not require imputing values for the unknown sampling covariances, it has hardly been used, and its performance has not been empirically investigated. Therefore, we set up a simulation study, showing that also in this situation, a three-level approach yields valid results: Estimates of the treatment effects and the corresponding standard errors are unbiased. Psychonomic Society, Inc., 2012 Multilevel nationallicence Meta-analysis nationallicence Multiple outcomes nationallicence Dependence nationallicence Van den Noortgate Wim Faculty of Psychology and Educational Sciences, University of Leuven, Vesaliusstraat 2, 3000, Leuven, Belgium aut López-López José Universidad de Murcia, Murcia, Spain aut Marín-Martínez Fulgencio Universidad de Murcia, Murcia, Spain aut Sánchez-Meca Julio Universidad de Murcia, Murcia, Spain aut Behavior Research Methods Springer-Verlag 45/2(2013-06-01), 576-594 45:2<576 2013 45 13428 https://doi.org/10.3758/s13428-012-0261-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.3758/s13428-012-0261-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Van den Noortgate Wim Faculty of Psychology and Educational Sciences, University of Leuven, Vesaliusstraat 2, 3000, Leuven, Belgium aut NATIONALLICENCE 700 1- López-López José Universidad de Murcia, Murcia, Spain aut NATIONALLICENCE 700 1- Marín-Martínez Fulgencio Universidad de Murcia, Murcia, Spain aut NATIONALLICENCE 700 1- Sánchez-Meca Julio Universidad de Murcia, Murcia, Spain aut NATIONALLICENCE 773 0- Behavior Research Methods Springer-Verlag 45/2(2013-06-01), 576-594 45:2<576 2013 45 13428 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer