We explored the influence of co-witness confidence and misinformation on the accuracy of collaborative and individual memory reports. Participants viewed a robbery video and discussed the event with a co-witness who was scripted to provide accurate or misleading details and to exhibit either high or low memory confidence. In a demonstration of memory conformity in co-witness discussions, highly confident co-witnesses who provided misleading or correct details led participants to report more misleading or correct information in both collaborative and individual reports. Furthermore, participants exhibited a confidence conformity effect, in which participants' confidence in their own memories mimicked the confidence of their co-witnesses.Copyright