Which statement is a basic assumption of Ayres' Sensory Integration theory?

• A. Sensory integration is purely genetic
• B. Language development is independent of senses
• C. The central nervous system is plastic
• D. The visual system determines behavior

Answer: (C)

The main idea being tested is that the central nervous system is plastic. Ayres’ Sensory Integration theory rests on the belief that the brain can reorganize itself in response to sensory experiences, especially during development, so that sensory inputs from touch, movement, proprioception, vestibular input, and other senses can be integrated to produce adaptive, goal-directed behavior. This plasticity explains why structured, graded, meaningful sensory activities can improve processing and functional skills over time—the brain is capable of changing its connections and networks in response to experience.

That’s why this statement fits best: it captures the foundational assumption that underlies SI theory and its approach to therapy. It also helps explain why other ideas don’t fit as well: saying processing is purely genetic ignores the role of experience-driven change; claiming language development is independent of senses contradicts the integral link between sensory input and learning; and stating the visual system alone determines behavior oversimplifies behavior to a single modality rather than a coordinated, multisensory process.