mental rotation

Vision can manipulate images to see if two shapes correspond. Vision can zoom, rotate, stretch, color, and split images {mental rotation} [Shepard and Metzler, 1971] [Shepard and Cooper, 1982].

high level

Images transform by high-level perceptual and motor processing, not sense-level processing. Image movements follow abstract-space trajectories or proposition sequence.

motor cortex

Motor processes transform visual mental images, because spatial representations are under motor control [Shiekh, 1983].

time

People require more time to perform mental rotations that are physically awkward. Vision compares aligned images faster than translated, rotated, or inverted images.

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