legal proceeding; psychology; psychiatry; expertise; accordance

Expert opinions are an important part of many legal proceedings. To be a useful instrument they must meet the requirements of ?validity? and ?reliability? in the sense of multiple observers consent. Consensus or disagreement of forensic expertise indicates the actual usefulness, validity and effectiveness of this practice. We analyzed 40 cases containing a pair of expert opinions. The comparison showed that of the 40 selected cases only 3 cases showed disagreement in the forensic experts? conclusions. The results of comparative analysis also showed that experts from different areas use different language and focus on slightly different aspectsin describing the evaluated cases. The observed ratio of mutual agreement and disagreement indicates a high proficiency and competence of experts. The results show that the forensic expertise is justified in the justice system of Czech Republic and these expertises describe reality objectively (in the sense of consensus of different professionals).