Hanna Segal, a British psychoanalyst who helped change child psychology in the United States by explaining and popularizing play therapy techniques taught by seminal psychoanalytic thinker Melanie Klein, died at age 92. Jean Camberg, who teaches the history of play therapy at the Temple's School of Social Work, said the popularization of Klein's techniques made them universally accepted and widely used in the United States, South America and Europe for the last 45 years.