Clinical prediction models are widely used in modern clinical practice. Such models are often developed using individual patient data (IPD) from a single study, but often there are IPD available from multiple studies. This allows using meta-analytical methods for developing prediction models, increasing power and precision. Different studies,…

This review presents a comprehensive evaluation of the effectiveness of routinely delivered psychological therapies across inpatient, outpatient and University-based clinics. This was a pre-registered systematic-review of studies meeting pre-specified inclusion criteria (CRD42020175235). Eligible studies were searched in three databases: MEDLINE,…

When studies use different scales to measure continuous outcomes, standardised mean differences (SMD) are required to meta-analyse the data. However, outcomes are often reported as endpoint or change from baseline scores. Combining corresponding SMDs can be problematic and available guidance advises against this practice. We aimed to examine the…

The 40-year history of meta-analysis is traced from the vantage point of one of its originators. Research syntheses leading to the first examples of meta-analysis are identified. Early meta-analyses of the literature on psychotherapy outcomes and school class size are recounted. The influence on the development of meta-analysis of several…

Clinical trials exploring the effectiveness of counseling and psychotherapy in treatment of depression in school-age youth composed this meta-analysis. Results were synthesized using a random effects model for mean difference and mean gain effect size estimates. No effects of moderating variables were evident. Counseling and psychotherapy are…

Background: Persons with intellectual disabilities (ID) often show challenging behaviour. We review distinct interventions that are applied to treat these challenging behaviours, and analyse intervention effects and moderating variables. Methods: A literature search was conducted using the databases "ERIC," "PsycINFO," "Web of Science" and…

Previous quantitative reviews of research on psychotherapeutic interventions for bereaved persons have yielded divergent findings and have not included many of the available controlled outcome studies. This meta-analysis summarizes results from 61 controlled studies to offer a more comprehensive integration of this literature. This review examined…

Bridging the gap between lab and clinic has become a rallying cry for a generation of treatment researchers, and identifying and overcoming barriers to successful dissemination of best-practice treatment has become a major public mental health priority. In this review, the authors argue that a key limit to accomplishing this goal may be found back…

Conducted meta-analysis of 108 well-designed outcome studies using 4- through 18-year-old subjects to examine effectiveness of psychotherapy with children and adolescents. Overall, findings revealed significant, durable effects of treatment that differed somewhat with client age and treatment method but which were reliably greater than zero for…

Considered the relative effectiveness of drug therapy and psychotherapy in the treatment of unipolar depression in adults in a meta-analysis of 56 outcome studies. Evidence suggested that psychotherapy was superior to drug therapy. (Author/LLL)

Conducted meta-analysis of 163 randomized trials to examine differences in outcome associated with different theoretical orientations, differences between marital and family therapies versus individual therapies, clinical significance of therapy outcome, differences between marital versus family therapies in both outcomes and problems treated, and…

Reviewed 252 empirical studies of psychotherapy from "Journal of Consulting and Clinical Psychology" in 1967/1968, 1977/1978, and 1987/1988. Found main trend to be decline in theory-guided and rise in pragmatic, clinically oriented research. Discusses disadvantages of purely empirical approach to psychotherapy research and makes…

Used a meta-analysis to integrate the research literature on the treatment of obsessive-compulsive disorder. Antidepressants, such as clomipramine, and behavior therapy have produced appreciable changes in obsessive-compulsive and depressive symptoms. The effects of tricyclic medication and exposure therapies have not differed significantly, but…

In review of 19 clinically relevant comparative outcome studies published 1978-88, short-term psychodynamic psychotherapy (STPP) was evaluated as to overall effects, differential effects, and moderating effects vis-a-vis no-treatment controls and alternative psychotherapies, respectively. Overall, STPP was superior to controls at posttreatment,…

Evaluated 18 child therapy outcome studies containing 26 treatment/control comparisons on at least 1 language measure. Results indicated that child therapy had significant positive impact of children's language proficiencies; individual was superior to group treatment. Trends emerged suggesting relationships between magnitude of language change…