This document defines and discusses the key concepts of attention and distraction. It begins by defining attention as the concentration of consciousness on one object rather than others. It then outlines the types of attention, including voluntary and involuntary, and lists some of the main internal and external factors that can influence a person's attention. The document also defines distraction as anything that interferes with attention, and discusses some common sources of distraction both external and internal. It concludes by mentioning the span of attention and how it represents the limit of how long a person can concentrate on something.