noun, noun which may take the genitive case particle 'no'
perceptivity; perceptual ability
Refers to the capacity to perceive or discern sensory information or subtle details. Often used in psychological or educational contexts.
There is training to improve perceptual ability.
With his excellent perceptivity, he noticed the small change.
Compound of 知覚 (perception) and 力 (power, ability). The exact historical derivation is uncertain, but the meaning is transparent from its components.