The developmentally handicapped witness: Competency as a function of question format.

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Abstract
This study compared the ability of 30 developmentally handicapped (DH) and 30 nonhandicapped individuals in their ability to report on witnessed events. Participants watched a film clip and were asked to respond to five different types of questions about it. Misleading or leading questions were embedded in three of the question types Results indicated that in response to free recall and very general questions, DH participants did not provide as complete responses as did nonhandicapped participants, although the information provided by both groups tended to be quite accurate. Both groups, and particularly DH individuals, were less accurate in responding to more focused shortanswer recall questions. In response to correct leading specific and statement questions, requiring recognition of the information provided, DH and control participants were comparable in their performance. DH participants had greater difficulty with misleading recall questions and false leading specific and statement questions. Results are discussed in terms of optimizing eyewitness accuracy in DH individuals.