Because of his previous work with maladapted and delinquent children, he became interested in the development of children and began work at the Child Guidance Clinic in London, which was also known as the East London Child Guidance Clinic.
På grund af hans tidligere arbejde med maladapted og kriminelle børn, blev han interesseret i udviklingen af ​​børn og begyndte at arbejde på Child Guidance Clinic i London, der også var kendt som East London Child Guidance Clinic.