Answer:
Parallel processing
Explanation:
Parallel processing is the ability of the brain to process many information of differing quality at once.this process involves analyzing and distributing the receive stimulus into four compartments : Color, shape, motion,depth.
George stroke made him to lost the capacity to perceive colors but retained the capacity to perceive movement and form
Janet had a stroke and lost the capacity to perceive motion but retained the capacity to perceive shapes and colors.
The disability in the question are typical type of the four compartment of Parallel processing