The Impact of Multifaceted Questions on Eyewitness Accuracy Following Forced Fabrication Interviews.

Lawyers will frequently use complex-question forms, such as multifaceted questions (single questions that contain both a true and a false proposition), when cross-examining witnesses, and prior research has shown that use of such questions reduces testimonial accuracy. The present study extends this research by using a forced fabrication paradigm (Chrobak & Zaragoza, 2008) to assess how multifaceted questions might affect eyewitness suggestibility after exposure to misleading post-event information. Consistent with prior studies, the use of multifaceted questions led to lower accuracy than simple questions. The novel finding was that multifaceted questions caused larger impairments in performance among fabrication participants (who had earlier been suggestively interviewed), than in control participants (who had not). We also provide preliminary evidence that the impairment caused by multifaceted questions is due to both (a) having to consider two propositions simultaneously, and (b) the shift in question focus from the fabricated event to a true event.