The concurrent association between security of attachment and adaptive func
tioning at school in middle childhood was examined. A sample of 113 childre
n of 4th and 5th grade filled out a self-report measure of attachment secur
ity (Kerns, Klepac, & Cole, 1996) and were administered the Doll Story Comp
letion task (Bretherton, Ridgeway, & Cassidy, 1990b) modified for use with
children in middle childhood to assess the quality and the security of atta
chment-related representations of the relationship with the mother. Accordi
ng to the latter measure children were classified as secure, avoidant, ambi
valent, or disorganised with regard to attachment. Their teachers completed
several questionnaires assessing each child's academic achievement, emotio
nal and social adjustment, and frequency of behavioural problems. In additi
on, each participating class underwent a sociometric procedure. Findings ba
sed on correlations and comparisons of attachment groups indicated that sec
ure children showed better adjustment to school as reflected in teachers' r
eports of scholastic, emotional, social, and behavioural adjustment, as wel
l as in peer-rated social status. Avoidant and disorganised children showed
the poorest adjustment. Findings indicated the usefulness of attachment th
eory in understanding adjustment to the school environment in middle childh
ood.