Dr. Greenwood received her PhD at SUNY Stony Brook. She went on to a post-doctoral fellowship at the West Haven VA and Yale University to learn event-related potential techniques with Truett Allison and W.R. Goff and conduct basic research on somatic event-related potentials. She eventually moved to Catholic University in Washington, DC, as research faculty to study attention using both electrophysiology and behavioral methods in healthy aging and Alzheimer's disease. At Catholic, she and Raja Parasuraraman developed a large-scale study of the genetics of cognitive aging using both information processing and standardized neuropsychological assessments of cognition as a function of APOE and neurotransmission genes. They moved this study to George Mason University in 2004 and added imaging measures and a longitudinal component. The goal of this research is to study the genetic modulation of cognitive and brain change in midlife by measuring effects of neurotransmission and neurotrophic SNPs, including the Alzheimer susceptibility gene APOE. Brain change is measured in cortical thickness and white matter integrity from MRI scans. With their European collaborators, Drs. Greenwood and Parasuraman are involved in the first large-scale genome-wide study (GWAS) of cognitive aging. Current research efforts are focused on understanding optimal methods of conducting cognitive training, with a goal to supporting a vigorous mental life throughout the lifespan.