Nonverbal Response Cards (IMAGE) Brown University Caption Using these cards, survey participants can answer very sensitive questions confidentially without reading, writing or speaking. The interviewer records only a code and does not know the content of the response. Credit Studies in Family Planning Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.