I’d suggest a rewording, in that they are not failing to process and understand information, but rather failing to focus their mental processing capability on a specific item in a sea of incoming information.

A better description would be that you take for granted your ability to disregard all the unnecessary sensory information and focus on a single item. Where they are forced to have all the sensory information forced directly in their conscious mind, and are not able to cope with it in some instances.

An odd way of walking is also common, which seems to stem from having to consciously handle the coordination of something which should normally be handled subconsciously. Ask one of them and they’ll tell you they have to handle many of the normally subconscious/automatic motions and activities with conscious effort.