The relationships between child and forensic interviewer behaviours and individual differences in interviews about a medical examination

This study examined the interviewing process between professional forensic interviewers and their “mock” child witness. Fifty-eight preschool children participated in a medical examination, and were later interviewed by an experienced forensic interviewer (n = 15) about this event. Interviews were coded with mutually exclusive and exhaustive coding schemes that captured interviewers and child behaviours in a temporally organized manner. To evaluate the relationship between interviewers' and children's individual differences measured prior to the interview and the interview outcomes (i.e., questions asked, child interview behaviour), all child participants were tested with relevant cognitive and behavioural measures, and all adult interviewers were tested with personality measures. Results showed that leading questions were more often followed by simple assents and denial than expected. Interviewers did not remain consistent from question to subsequent question, but children's response type was predictable from response to subsequent response. Children's and adults' individual differences measured prior to the interview predicted some of the adults' interviewing behaviours and some of children's own response behaviours during the interview. Mediation modelling evinced that more self-controlled interviewers posed more recommended questions and elicited more assents with details from the children. We discuss the results in relation to established views of recommended interview practice and to theories of suggestibility.