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Table 4 Results of trials of test/feedback interventions

From: Improving understanding in the research informed consent process: a systematic review of 54 interventions tested in randomized control trials

Source Standard control     Sample size Understanding scores,%  
   Intervention Population Scenario   Control Intervention P Value
Eyler et al., 2004 Y Supplementary, scripted Q/A by study staff throughout narration. Staff provided correct answer immediately after posing question° Patients with mental illness Real 24 57 68 NS
  Y Supplementary, scripted Q/A by study staff throughout narration. Staff provided correct answer after patient answered a question° Patients with mental illness Real 32 57 67 NS
Taub et al.,1983 N° Participant asked to repeat knowledge quiz (up to three times) if any questions were answered incorrectly° Elderly volunteers Real 100 69 89 <.01
  1. Abbreviations: NA Not available, NS Not significant, Q/A Question and answer.
  2. °Human proctor available for question/answer.