1. Postdoctoral Research Psychologist, Avon Longitudinal Study of Parents and Children, Departent of Community-Based Medicine, University of Bristol, 24 Tyndall Avenue, Bristol, BS8 1TQ, England
2. Principal Lecturer in Psychology, School of Health and Social Sciences, George Eliot Building, Coventry University, 4 Priory Street, Coventry, CV1 5FB, England