Cognitive complexity is a psychological characteristic or psychological variable that indicates how complex or simple is the frame and perceptual skill of a person.t is used as part of one of the several variations of the viable non-empirical evaluation model GOMS (goals, operators, methods, and selection rules); in particular the GOMS/CCT methodology. Cognitive complexity can have various meanings:
Essential tremor is a nerve disorder in which tremors occur without an identifiable cause. The tremor resembles an exaggerated shaking and occurs when a person is using his or her hands but does not occur while the hands are at rest. Parkinsonâs tremors are just the opposite â noticeable shaking when at rest but no shaking when the hands are engaged.
Researchers arenât entirely sure what causes the interruption nor how to stop it. Theyâre also unclear about whether itâs a degenerative process. People with essential tremor experience frequent shaking. The shaking canât be controlled and most often occurs in the hands, arms, head, and vocal cords. Keep reading: Essential tremor Â» By comparison, people with Parkinsonâs disease typically experience a hand tremor when their muscles are at rest and see a reduction in the tremor when their muscles are in use.