Which cognitive function is most likely to improve when a school-age child consistently gets 9-11 hours of sleep?

• A. Attention and memory
• B. Height growth
• C. Color vision
• D. Reaction time only in sports

Answer: (A)

Adequate, consistent sleep enhances cognitive function, especially attention and memory. When school-age children get about 9–11 hours, their brain has time for the processes that keep attention sharp and help encode and consolidate new information learned during the day. This makes it easier to stay focused in class, follow instructions, and remember facts and skills for quizzes and tests.

Growth in height is influenced by hormones and overall nutrition, not directly by waking attention or memory. Color vision stays stable and isn’t driven by typical sleep patterns. Reaction time can improve with good sleep, but it’s a broader effect and not as closely tied to learning and memory as attention and memory are.