Parents' reports and teachers' reports about children's behaviour were recorded using Rutter's Behaviour Scale for Parents and Rutter's Behaviour Scale for Teachers in 100 school children (aged 12-16 yrs) in Sharjah, United Arab Emirates. In this study, correlation between both informants' scores for individual items ranged from .62 (tears on arrival at school/refuse) to . 10 (stomachache/vomitting) and for problem categories ranged from .18 (emotional problems) to .36 (conduct problems) suggesting a lack of congruence among these 2 sources. It was also found that agreement between parents and teachers was better for conduct than for emotional problems. The findings indicate the need for cross-informant assessment in behavioural research in children.