David Lavallee is Professor and Head of Department of Sport and Exercise Science at Aberystwyth University, UK. His educational qualifications include a Master's degree in Psychology from Harvard University and a Ph.D. in Sport and Exercise Psychology from the University of Western Australia. He has published seven books, and is Editor of Sport Exercise Psychology Review, Associate Editor of The Psychologist and International Review of Sport and Exercise Psychology, and Editorial Board Member of the Journal of Clinical Sport Psychology and Psychology of Sport and Exercise. Jean M. Williams is a professor in the Department of Psychology at the University of Arizona, USA where she teaches courses in stress and coping and psychology of excellence. She has been an active sport psychology researcher and consultant for over thirty years and published extensively. Marc V. Jones is a reader in Sport and Exercise Psychology at Staffordshire University where he is course tutor for the first on-line distance learning MSc in Sport and Exercise Psychology. Marc also works as a consultant (accredited by the British Association of Sport and Exercise Sciences) and a Chartered Sport and Exercise Psychologist with the British Psychological Society.Lavallee, David is the author of 'Key Studies in Sport and Exercise Psychology', published 2008 under ISBN 9780077111717 and ISBN 0077111710.