Examining the major progress made in recent psychological science in understanding the cognitive control of thought, emotion, and behavior, this book reveals what happens when that control is diminished as a result of aging, depression, developmental disabilities, or psychopathology. Each chapter reports the most recent research by a leading researcher on the international stage. Topics include the effects on thought, emotion, and behavior by limitations in working memory, cognitive control, attention, inhibition, and reasoning processes. The explicit objective of the volume is to facilitate inter-disciplinary research and training.