Based on the First Biannual Lifespan Development Conference, this volume offers a multidisciplinary and multidimensional approach to the study of lifespan development in the areas of neuropsychology, cognition, behavior genetics, and perception. The objective of the conference was to provide a lively forum for the discussion of issues related to lifespan development and to reflect on important topics challenging the field during the 1990s. The chapters in this book, motivated by the conference presentations, cover: * the assessment and evaluation of developmental changes in visual perception; * the contribution of behavioral genetic factors to development; * the predictability of perinatal risk factors as they relate to cognitive and linguistic outcomes; * the neuropsychological changes during aging; and * innovative approaches to the study of cognitive development using neuropsychological testing methods.