Education: Harvard University: 1965 (BA in psychology). 1971 (PhD in social psychology)

Family: Three children by his first wife from whom he is divorced; Kerith, who runs the National Academy of Education; Jay, a photographer, and Andrew, a teacher. Married to: Ellen Winner, a developmental psychologist. One son: Benjamin, aged 15.

Interests: The arts

Holidays: Family things and opportunistic trips abroad. New Year is spent in Hilton Head, South Carolina.