'This book is interesting, well written and easy to read. I recommend it highly to all students and researchers who are interested in gesture.' - Sandra Smith, Deafness & Educational International

'The data described...inform the study of language acquisistion generally, as well as contributing immensely to the understanding of language and communication in exceptional circumstances. ... It will appeal to those with an interest in language development or with a specific interest in communication and hearing impairment. it would also complement the core texts for any course on language development, and its accessible style should appeal to a wide readership.' - Dr Fiona Lyddy, in The Irish Psychologist, May 2006.