An area of concernfor evaluation research is the extent to which evaluations are utilized in policy and program development and change. The current review critically discusses definition of utilization and methodsfor detecting utilization. Five "clusters" of variables have been found to affect utilization. These are: (1) the relevance of evaluation to the needs of potential users; (2) extent of communication between potential users and producers of evaluations; (3) translation of evaluations into their implicationsforpolicy and programs; (4) credibility or trust placed in evaluations; and (5) commitment or advocacy by individual users.
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