The goal of this book is to present and evaluate the concept of dynamic testing. Unlike 'static' tests such as the SAT or IQ tests, dynamic testing emphasizes learning potential rather than past learning accomplishments. The book opens with a theoretical framework of abilities as forms of developing expertise. It then continues with an introduction to dynamic testing and then a capsule history of dynamic testing. The book also reviews the approaches of Feuerstein and Budoff and other diverse approaches to dynamic testing. The Drs Sternberg and Grigorenko present their own three-prong approach to dynamic testing along with two case studies using dynamic testing in their own research. The authors conclude that dynamic testing has enormous potential which has not yet been tapped.