Contents: G. Gottlieb, Foreword. Preface. Part I:Issues of Timing in Developmental Theory. G. Turkewitz, D.A. Devenny, Timing and the Shape of Development. J. Valsiner, Making of the Future: Temporality and the Constructive Nature of Human Development. R.M. Lerner, D.F. Perkins, L.P. Jacobson, Timing, Process, and the Diversity of Developmental Trajectories in Human Life: A Developmental Contextual Perspective. R.B. Cairns, Belated but Bedazzling: Timing and Genetic Influence in Social Development. Part II:Timing as a Developmental Mechanism. E. Thelen, Timing and Developmental Dynamics in the Acquisition of Early Motor Skills. R. Lickliter, Timing and the Development of Perinatal Perceptual Organization. G. Turkewitz, The Influence of Timing on the Nature of Cognition. S.C. Levine, Effects of Early Unilateral Lesions: Changes Over the Course of Development. Part III:Formative Role of Timing. N.E. Spear, L. Hyatt, How the Timing of Experience Can Affect the Ontogeny of Learning. M. Hofer, Developmental Roles of Timing in the Mother-Infant Interaction. L. Nadel, L. Wilson, E.M. Kurz, Hippocampus: Effects of Alterations in Timing of Development.