Cognition definitions: (general) modes of cognition (norman, 1993) Experiential cognition state of mind which one perceives, acts, reacts to surrounding events effectively, and effortlessly. Reflective cognition requires leve of expertise and. Involves thinking, comparing, decision making leads to new ideas, creativity. Both modes essential for everyday life: cognition as specific kinds of processes: Attention; perception; memory; learning; reading, speaking and listening; problem solving, planning, reasoning, and decision making. Attention process of selecting things to concentrate on, at a point in time, from range of possibilities (things: involves auditory and/or visual senses, allows focus on currently relevant information; difficulity. Goals clearly defined goals, know exactly what to varies b/c: focus on options. Information presentation difficulty of attending to appropriate pieces of information influenced by its display. Ex. text display structure influences readability/comparing: multitasking and attention. Multitasking effectiveness depends on nature of tasks, and how much attention each task demands. Heavy more prone to being distracted than light.