Papers of William Yule, 1964-2002, including: questionnaires, test instructions, notes, progress reports, conference papers and articles, 1964-1969, relating to a longitudinal educational and medical survey of schoolchildren on the Isle of Wight (selected as a relatively static but socially and economically cross-representative population: this was the first epidemiological survey of this size to cover child health and the impact of health on educational achievement); questionnaire, articles and notes relating to 1982-1983 study on the effect of lead on children's development, and assessments of the tests used; reports and correspondence, 1987-1990, relating to survivors of the 1987 HERALD OF FREE ENTERPRISE cross-channel ferry disaster; reports, correspondence, questionnaires and articles, 1988-1996, relating to survivors of the 1988 sinking of the educational cruise ship JUPITER off the coast of Greece, including two studies, 1989-1992 and 1994-1996, of survivors and their experience of post traumatic stress disorder (PTSD), which established the previously debated capacity of adolescents to suffer from PTSD; notes, questionnaires and articles, 1992-1993, relating to a World Health Organisation study, 'Brain development in utero', in Ukraine, Belarus and Russia, concerning the prenatal development of children born shortly after the 1986 Chernobyl nuclear power plant accident; reports, 1993-2002, relating to the charitably-funded School for Life, assisting children with severe learning difficulties, Kiev, Ukraine; reports, correspondence and notes, 1995-1996, concerning the joint United Nations Children's Fund (UNICEF) and Institute of Psychiatry project to provide psychosocial support to war-affected children, Bosnia.