This volume reports on a study of 850 pairs of twins who were tested to determine the influence of heredity and environment on individual differences in persona

This book is designed to help students organize their thinking about psychology at a conceptual level. The focus on behaviour and empiricism has produced a text

Differences between people are a fascinating and long-standing area of psychological inquiry. However, previous research has largely been confined to studies at

This book discusses the nature - nurture debate as it relates to human intelligence.