Many psychiatric and psychological workers either express scepticism at the possibility of measuring the infant's abilities reliably or doubt as to its usefulness in any field outside the developmental study. Reading Dr. Griffith's book will convince them of its wider applicability especially in the diagnostic sphere. The author's indebtedness to Gesell is everywhere apparent, but this in no way detracts from the individuality of her approach. The publication is an important event since it is the first British Baby Test, standardized on British babies, and providing developmental profiles that take many aspects of the child into account—but not the 'total child' as many of the organismic writers claim. Cultural loading is not a big factor in baby tests, and it will be the intrinsic merits of the Griffiths test that will lead to its replacing the American versions.