[EN]Summary: The Behaviour Analysis Interview (BAI) is an interview protocol developed by John E. Reid and Associates to generate
different reactions in guilty and innocent suspects. Even though research has questioned the usefulness of the BAI protocol (Vrij
et al., 2006), many law enforcement officials are trained in the BAI every year. Two studies were conducted to examine whether the
BAI recommendations are in line with lay participants’ beliefs about the correlates of guilt or innocence. In Study 1, the
participants read the transcriptions of two BAIs and had to indicate which one corresponded to the guilty suspect. Virtually all the
participants who were familiar with the BAI protocol were successful in this task; however, more naı¨ve participants (69%) than
expected by chance were also able to identify the guilty interview. In Study 2, a questionnaire was designed to examine whether
those behaviours that the BAI proponents maintain are guilt indicators were judged by lay participants as more indicative of guilt
than those behaviours that the BAI proponents maintain that are indicators of innocence. The results strongly supported this
prediction. Not only are the BAI recommendations inaccurate, but they are also in line with what people already believe.
Apparently, little new can be learned by attending training seminars on the BAI. Law enforcement personnel should be taught
interview protocols grounded on sound science instead of unsupported common-sense beliefs.
