Gerald Samuel Lesser (August 22, 1926 – September 23, 2010) was an American psychologist who served on the faculty of Harvard University from 1963 until his retirement in 1998. Lesser was one of the chief advisers to the Children's Television Workshop (CTW, later known as the Sesame Workshop) in the development and content of the educational programming included in the children's television program Sesame Street. At Harvard, he was chair of the university's Human Development Program for 20 years, which focused on cross-cultural studies of child rearing, and studied the effects of media on young children. In 1974, he wrote Children and Television: Lessons From Sesame Street, which chronicled how Sesame Street was developed and put on the air. Lesser developed many of the research methods the CTW used throughout its history and for other TV shows. In 1968, before the debut of Sesame Street, he led a series of content seminars, an important part of the "CTW Model", which incorporated educational pedagogy and research into TV scripts and was used to develop other educational programs and organizations all over the world. He died in 2010, at the age of eighty-four, and was survived by his wife, a daughter, a son, and a grandchild. Source: Wikipedia (en)