Two experiments examined effects of a cognitive interview on 4- and 8-year-olds' correct recall and subsequent reporting of misinformation. Found that a cognitive interview elicited more correct details than a control interview. Eight-year-olds' reports were more complete than 4-year-olds', with more correct person, action, object, and location details. Cognitive interviews given after postevent misinformation reduced children's reporting of misinformation at interview and reduced reporting of self-generated misinformation at test. (Author/KB)