Meta-analysis of consultation outcome studies

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Abstract
The results of 54 controlled studies of psychological consultation using mental health, behavioral, and organization development models were synthesized using meta-analysis. The results supported the continued use of consultation as an effective practice in modifying consultee and, to a lesser extent, client behavior and attitudes. On the average, consultees showed improvements greater than 71% and clients showed improvements greater than 66% of untreated comparable groups. No differences were found in terms of effectiveness among the three models.