ABSTRACT:Meta-analysis includes statistical methods in combining the results of several studies. However, it might be affected by publication bias. Publication bias is the preferred publication of statistically significant results over insignificant ones. Therefore, if the source of meta-analysis studies are published scientific articles, they might face publication bias. Trim and fill is a met...

BACKGROUND When the nature and direction of research results affect their chances of publication, a distortion of the evidence base - termed publication bias - results. Despite considerable recent efforts to implement measures to reduce the non-publication of trials, publication bias is still a major problem in medical research. The objective of our study was to identify barriers to and facilit...

BACKGROUND It is not clear whether the effects of cognitive-behavioural therapy and other psychotherapies have been overestimated because of publication bias. AIMS To examine indicators of publication bias in randomised controlled trials of psychotherapy for adult depression. METHOD We examined effect sizes of 117 trials with 175 comparisons between psychotherapy and control conditions. As ...

Abstract Meta-analysis, the statistical analysis of results from separate studies, is a fundamental building block science. But assumptions classical meta-analysis models are not satisfied whenever publication bias present, which causes inconsistent parameter estimates. Hedges’ selection function model takes into account, but estimating and inferring with this tough for some datasets. Using gen...