Why might cognitive neuropsychology be considered not valid for childhood disorders?

• A. Because the cognitive systems of children are dynamic, whereas those of adults static
• B. Because children's brains are fully matured
• C. Because there is no data on children
• D. Because cognitive processes are identical across ages

Answer: (A)

Developmental change in cognition is the key idea here. Children’s brains and cognitive systems are continually developing, reorganizing, and using different strategies as they grow, whereas adult cognitive architecture tends to be more stable. Cognitive neuropsychology often interprets patterns of impairment and spared abilities based on relatively fixed, adult-like brain–behavior mappings. If those adult models are applied to children, they can misrepresent how a child's mind actually operates because the networks supporting a given task may differ across ages, and strategies or compensations after a disruption can change as development proceeds. This dynamic nature of childhood cognition is what undercuts the broad applicability of adult-based cognitive neuropsychology to childhood disorders.

The other statements don’t fit because brains in children are not fully mature, so saying they are, or implying there’s no data on children, or that cognitive processes are identical across ages, would all be incorrect.