That there continue to be major gaps in our knowledge of personality development is apparent with each new case of an emotionally disturbed child that presents itself. The increasing incidence of seriously disturbed children, wherein the behavior is so atypical as to suggest a diagnosis of psychosis, sharply points up the need for a better knowledge of such development.
This book is a major and serious attempt to unravel a piece of this personality development. It is based on an infancy research project carried out at the Menninger Foundation between 1949 and 1950 under the direction of Drs. Sibylle Escalona and Mary E. Leitch. The essential material was drawn from a cross sectional examination of the behavior of 128 individual infants as observed in the care of their mothers for an approximately four-hour period by three investigators. Sixteen infants, eight boys and eight girls, were observed at monthly age levels