The PISA WRAS Questionnaire was developed to assess the probable culpability (or not) of a group of individuals (typically employees) after occurrence of a specific crime or other form of unacceptable behaviour. The projection technique is used in the questionnaire. The process is useful to assess a large number of individuals in a relative short period of time.

The questionnaire poses a number of questions to the individual. These questions are adapted to be situation specific. The answers given by the individual, as well as the way in which the answers are presented on paper, is assessed. Assessment is done with the aid of specially developed computer software.

Based on the assessment, individuals are identified for inclusion in the continued investigation. Further investigative steps could include polygraph examinations, questioning and field investigations. A word of caution though, the WRAS can never be used as the only investigative technique in an investigation.

The advantage of the technique lies in the economical (both in terms of time and money) way possible suspects on the one hand, and innocent individuals on the other hand, can be identified.

The validity of the technique (i.e. that it measures what it is supposed to measure) is placed at between 72% – 75%. However, the validity of the technique is somewhat diminished with lower levels of education. When an interpreter is used, the validity drops significantly.