Meta-analyses of positive psychology interventions: The effects are much smaller than previously reported

Positive psychology interventions: a meta-analysis of randomized controlled studies

(2013) Linda Bolier et al.   BMC PUBLIC HEALTH

Meta-regression approximations to reduce publication selection bias

(2013) T. D. Stanley et al.   Research Synthesis Methods

Disseminating Self-Help: Positive Psychology Exercises in an Online Trial

(2012) Stephen M Schueller et al.   JOURNAL OF MEDICAL INTERNET RESEARCH

Detecting and adjusting for small-study effects in meta-analysis

(2011) Gerta Rücker et al.   BIOMETRICAL JOURNAL

Treatment-effect estimates adjusted for small-study effects via a limit meta-analysis

(2010) G. Rucker et al.   BIOSTATISTICS

Outlier and influence diagnostics for meta-analysis

(2010) Wolfgang Viechtbauer et al.   Research Synthesis Methods

The PRISMA Statement for Reporting Systematic Reviews and Meta-Analyses of Studies That Evaluate Health Care Interventions: Explanation and Elaboration

(2009) Alessandro Liberati et al.   PLOS MEDICINE