A Man Without Words

A Man Without Words is a book by Susan Schaller, first published in 1991, with a foreword by author and neurologist Oliver Sacks. The book is a case study of a 27-year-old deaf man whom Schaller teaches to sign for the first time, challenging the Critical Period Hypothesis that humans cannot learn language after a certain age.

A Man Without Words

A Man Without Words is a book by Susan Schaller, first published in 1991, with a foreword by author and neurologist Oliver Sacks. The book is a case study of a 27-year-old deaf man whom Schaller teaches to sign for the first time, challenging the Critical Period Hypothesis that humans cannot learn language after a certain age.