ABSTRACT
Recent advances in the study of intraindividual variability (IIV) have offered new and exciting avenues to address important questions of human development and behavior across the life span. Novel longitudinal research designs and statistical advances have facilitated a paradigm shift in developmental psychology. There is increasing acknowledgment that single-occasion measurements and multi-occasion indices of central tendency capture only some of the relevant information when considering dynamic processes of growth and development. The IIV approach exemplifies the increasing attention paid to individual, short-term fluctuations in behavior and consideration of the adaptive and/or maladaptive implications of such. These developments have critical implications for practice and research in clinical neuropsychology, presenting both a challenge and an opportunity to those who work in this field.
