Much of our experimental work on aging has focused on cognitive control. Cognitive control concerns dealing with complex tasks in a complex environment, which includes: (a) making sure that only the appropriate stimuli from the environment enter into consciousness; (b) continuously updating the content of working memory; (c) switching between different tasks; (d) coordinating the different actions that need to be performed; and (e) switching back and forth between relevant stimuli. Some of these aspects seem to be more susceptible to aging than others (b, c, and d); some have different effects of speed and accuracy (e). We also conducted research on working memory per se. We are very interested in working memory dynamics. How (or even when) do people search working memory? Can we distinguish different subsystems in working memory depending on the retrieval dynamics? Are the memory processes in working memory cognitive primitives, or are they subsumed under known mechanisms of attentional control? A fourth research interest is creativity, more specifically the link between creativity (or, as we like to think of it, mental play), mood disorder, and different types of rumination.