Andrew Pickles is a methodologist and statistician with a special interest in developmental psychopathology. His work spans genetics to long-term cohort and follow-up studies. Currently at the University of Manchester, he was previously senior statistician at the MRC Child Psychiatry Unit at the Institute of Psychiatry, London. Barbara Maughan's research focuses on psychosocial risks for psychiatric disorders in childhood, and on continuities and discontinuities between disorder in childhood and in adult life. Michael Wadsworth has directed and worked on the first British national birth ...