The purpose of this study was to investigate whether clinicians investigating child sexual abuse (CSA) rely more on scientific knowledge or on clinical experience when evaluating their own expertise. Another goal was to check what kind of pre-trial beliefs the clinicians had. The connections between these different factors were investigated. A questionnaire covering items concerning demographic data, experience, knowledge about CSA, self-evaluated expertise and beliefs about CSA was given to 126 social workers, 60 child psychiatrists and 134 psychologists. The results showed that the clinicians relied more on their clinical experience than on scientific knowledge when evaluating their expertise as investigators of CSA. Furthermore, social workers possessed stronger attitudes in favor of children than the other groups, while child psychiatrists had more negative attitudes towards the criminal justice system. Male participants had less strong beliefs than did the female participants. The findings indicate that the education of CSA investigators should focus more on theoretical knowledge and decision-making processes as well as the role of pre-trial beliefs.

A Child Sexual Abuse Attitude and Belief Scale was constructed and then answered by 242 child psychologists. Four CSA related attitude and belief subscales were identified through confirmatory factor analysis: (1) The Disclosure subscale reflecting favouring a disclosure at any cost; (2) The Pro-Child subscale reflecting unconditional belief in children's reports; (3) The Intuition subscale reflecting favouring an intuitive approach to CSA investigations; and (4) The Anti Criminal Justice System subscale reflecting negative attitudes towards the legal system. Beliefs that were erroneous according to empirical research were analyzed separately. The results suggest that some psychologists hold extreme attitudes and many erroneous beliefs related to CSA. Some misconceptions are common. Female participants tended to have stronger attitudes than male participants. The more training in interviewing children the participants had had, the more erroneous beliefs and stronger attitudes they had. Experience did not affect attitudes and beliefs.

Clinicians' expertise in child sexual abuse (CSA) cases was explored by giving a questionnaire covering clinical experience, self-evaluated expertise, beliefs and attitudes about CSA and a trial material concerning CSA to 320 child mental health professionals. In the material the suggestiveness of the interview with the child was varied and one condition did not contain any interview transcript. Participants were sensitive to the presence of leading questions but not to the presence of other suggestive techniques and not to the possibility that suggestive techniques could have been used when no interview transcripts were included. Experience only affected sensitivity to leading questions. Strong attitudes and beliefs lessened the sensitivity to leading questions and made participants more prone to wanting the case to be prosecuted when other suggestive influences than leading questions were present. Practical implications of the results will be discussed.