This study investigates the reliability and validity of the Questionnaire on Teacher Interaction (QTI) in three countries: Singapore, Brunei and Australia. The QTI maps student perceptions of interpersonal teacher behaviour and is based on the circumplex Model for Interpersonal Teacher Behaviour (MITB) that investigates the teacher-student relationship in terms of the two dimensions of influence and proximity. Students' perceptions of their teachers in the three countries are also compared. Results show that the QTI scales are represented by two independent dimensions and that scales can be ordered in terms of a circular structure. However, empirical scale locations differ from their theoretical positions as hypothesised by the circumplex model, and among countries. Differences in teacher influence and proximity are also found among the countries. (Contains 4 figures, 8 tables and 4 notes.)