1. Susanna M. K. Chow, MSc, MA, is Assistant Professor, Department of Rehabilitation Sciences, Hong Kong Polytechnic University, Hong Kong, China
2. Sheila E. Henderson, PhD, is Reader in Psychology, Department of Psychology and Special Needs, Institute of Education, University of London, 25 Woburn Square, London WC1H 0AA, United Kingdom; l.henderson@ic.ac.uk
3. Anna L. Barnett, PhD, is Research Officer, Department of Psychology and Special Needs, Institute of Education, University of London, United Kingdom