Eyewitness memory: Balancing the accuracy,precision and quantity of information through metacognitive monitoring and control

Although memory deteriorates over time, people may be able to maintain high accuracy by metacognitively monitoring the quality of their memories and strategically controlling their memory reports. We test two mechanisms of metacognitive control: Exercising a report option (withholding uncertain responses) and adjusting response precision (providing imprecise, but likely accurate, responses). Participants observed a mock crime and were interviewed after 10 minutes or 1 week. Interviews consisted of answerable questions in one of three formats (free narrative, cued recall, yes/no), allowing participants to exert more or less control over their answers. Participants' reports showed tradeoffs between accuracy, quantity and precision of information. Depending on the question format, participants maintained high accuracy even at the delayed report either by opting not to answer (yes/no or cued recall) or by providing imprecise answers (cued recall or free narrative). We discuss implications for experimental research, metacognitive theory and the criminal justice system. Copyright © 2010 John Wiley & Sons, Ltd.