Longitudinal data in the study of causal processes, some uses and some pitfalls, M.Rutter; longitudinal strategies, causal reasoning and risk research, N.Garmezy; individual and variable based approaches to longitudinal research on early risk factors, D.Magnusson and L.R.Bergman; statistical modelling of longitudinal data, A.Pickles; risk/protective factors for offending with particular reference to deprivation, I.Kolvin, F.J.W.Miller. M.Fleeting and P.A.K.Kolvin; a person-process-context approach, R.K.Silbereisen and S.Walper; follow up of biological high-risk groups, F.Kalveboer; longitudinal and systemic in the study of biological high and low-risk groups, K.E.Grossman; studying changes within individuals - the causes of offending, D.F.Farrington; deliquent development - theoretical and empirical considerations, L.Pulkkinen; school experiences as risk/protective factors, B.Maughan; school effects - the use of planned intervention ti study causal proceses, J.C.Van Der wolf; normative life events as risk factors in chilhood, J.Dunn; studying the impact of ordinary life - a development model, research plan and words of caution, D.F.Hay; intergenerational longitudinal research - conceptual and methodological considerations, M.E.J. Wadsworth; longitudinal approaches to intergenerational studies - definition, design and use, D.Quinton; causal paths, chains and strads, G.W.Brown; data gathering and data analysis for prospective and retrospective longitudinal studies, L.N.Robins; structural equation modelling of measurement processes in longitudinal data, D.M.Fergusson and L.J.Horwood; modelling reality - some comments, L.R.Bergman; continuities and discontinuities - conceptual issues and methodological considerations, R.A.Hinde.