population. In Deafness, Deprivation, ami /Q, Jeffrey Braden pulls together two often unrelated fields: studies of intelligence and deafness. The book includes the largest single compilation of data describing deaf people's intelligence that exists. Here is a careful, well-documented, and very thorough analysis of virtually ali the research available. Those who have studied human intelligence have long noted that deafness provides a "natural experiment." This book makes evident two contrary results: on the one hand, some research points to the impact deafness has on intelligence; on the other hand, the research supports the fact that deafness has very little, if any, impact on nonverbal measures of intelligence.