Further Development and Validation of the Prosocial Behaviour Questionnaire for Use by Teachers *

SUMMARY This paper describes the further development of a new rating scale for use by teachers, the Prosocial Behaviour Questionnaire (PBQ). The PBB is designed For use in the investigation of positive aspects of children's behaviour in primary school (ages 5–11 years). Tests of internal and external reliability and of validity are reported. It is concluded that the PBQ is a useful research instrument, However, teachers need training in its use and should be aware of the possible “halo” effects on their ratings of the child's sex. reading ability, aggressiveness and deviant behaviour