Hardbound. This volume is a Festschrift for Hans J. Eysenck on the occasion of his 80th birthday. The world's leading experts in the field of personality and intelligence have gathered together to honour the most widely cited living psychologist. Each chapter describes first Hans Eysenck's contribution to a particular topic then what research has developed from it, what kinds of amendments, modifications or additions to his work are appropriate and, finally thoughts about the future of the field.