Journal ArticleDOI
Combining effect size estimates in meta-analysis with repeated measures and independent-groups designs.
TLDR
In this paper, a method for combining results across independent-groups and repeated measures designs is described, and the conditions under which such an analysis is appropriate are discussed, and a meta-analysis procedure using design-specific estimates of sampling variance is described.Abstract:
When a meta-analysis on results from experimental studies is conducted, differences in the study design must be taken into consideration. A method for combining results across independent-groups and repeated measures designs is described, and the conditions under which such an analysis is appropriate are discussed. Combining results across designs requires that (a) all effect sizes be transformed into a common metric, (b) effect sizes from each design estimate the same treatment effect, and (c) meta-analysis procedures use design-specific estimates of sampling variance to reflect the precision of the effect size estimates.read more
Citations
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Journal ArticleDOI
Quasi-experimental study designs series-paper 10: synthesizing evidence for effects collected from quasi-experimental studies presents surmountable challenges.
Betsy Jane Becker,Ariel M. Aloe,Maren Duvendack,T. D. Stanley,Jeffrey C. Valentine,Atle Fretheim,Peter Tugwell +6 more
TL;DR: Meta-analyses of QEs provide particular challenges, but thorough coding of intervention characteristics and study methods, along with careful analysis, should allow for sound inferences.
Journal ArticleDOI
A Meta-Analysis of the Effect of Experimental Sleep Restriction on Youth’s Attention and Hyperactivity
TL;DR: Results indicate that sleep-restricted youth had significantly worse attention outcomes than youth with extended sleep, but no differences were evident regarding hyperactivity.
Journal ArticleDOI
Long-term functional outcomes of women receiving cognitive processing therapy and prolonged exposure.
TL;DR: In this paper, the authors investigated whether trauma-focused treatments for posttraumatic stress disorder (PTSD) improve psychosocial functioning outcomes, and whether treatment gains are maintained over a long-term follow-up (LTFU) period (5-10 years).
Journal ArticleDOI
Effects of Aerobic Exercise on Anxiety Symptoms and Cortical Activity in Patients with Panic Disorder: A Pilot Study
Eduardo Lattari,Henning Budde,Flávia Paes,Geraldo de Albuquerque Maranhão Neto,José Carlos Appolinario,Antonio Egidio Nardi,Eric Murillo-Rodríguez,Sergio Machado +7 more
TL;DR: Aerobic exercise can promote increase in anxiety acutely and regular aerobic exercise promotes reduction in anxiety levels.
References
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Book
Statistical Principles in Experimental Design
TL;DR: In this article, the authors introduce the principles of estimation and inference: means and variance, means and variations, and means and variance of estimators and inferors, and the analysis of factorial experiments having repeated measures on the same element.
Journal ArticleDOI
Statistical Principles in Experimental Design
TL;DR: This chapter discusses design and analysis of single-Factor Experiments: Completely Randomized Design and Factorial Experiments in which Some of the Interactions are Confounded.
Book
Statistical Methods for Meta-Analysis
Larry V. Hedges,Ingram Olkin +1 more
TL;DR: In this article, the authors present a model for estimating the effect size from a series of experiments using a fixed effect model and a general linear model, and combine these two models to estimate the effect magnitude.
Journal ArticleDOI
Statistical Methods for Meta-Analysis.
TL;DR: In this paper, the authors present a model for estimating the effect size from a series of experiments using a fixed effect model and a general linear model, and combine these two models to estimate the effect magnitude.