Cognitive demand is defined as

• A. Measure of how much info must be processed quickly
• B. Level of teacher talk during instruction
• C. Amount of time students have to complete tasks
• D. Student motivation level

Answer: (A)

Cognitive demand is the mental effort a task requires students to use in order to complete it. It focuses on how much information students must process and how deeply they must think—analyze, compare, justify, or create—often under some level of time pressure. That’s why this option fits best: it describes cognitive demand as a measure of how much information must be processed quickly, reflecting the amount of mental processing the task asks students to perform. In the classroom, tasks with higher cognitive demand require students to work with multiple ideas, make inferences, and justify their conclusions, rather than merely recall facts. It’s not about how much a teacher is talking, how much time is given alone, or students’ motivation. For example, a problem that asks students to evaluate conflicting sources and defend a position in a short amount of time demands more cognitive processing than a simple factual recall.