A review by German researchers of all meta-analyses (with sufficient data) of psychotherapeutic interventions for schizophrenia up to September, 2010 found evidence that psychosocial and family interventions were effective. There was little evidence of publication bias; the one example of a significantly skewed effect size, when corrected, changed the result in favor of psychosocial treatment. Results are in press at Schizophrenia Research.
Related Mad In America postings:
Publication Bias in Antipsychotic Trials,
High Attrition Leads to Misrepresentation of Antipsychotic Efficacy