Scientific
The Ouija phenomenon has been criticized by many scientists as a hoax related to the
ideomotor response. Various studies have been produced, recreating the effects of the Ouija board in the lab and showing that, under laboratory conditions, the subjects were moving the planchette involuntarily. Skeptics have described Ouija board users as 'operators'. Some critics noted that the messages ostensibly spelled out by spirits were similar to whatever was going through the minds of the subjects. According to Professor of neurology Terence Hines in his book Pseudoscience and the Paranormal (2003):
The planchette is guided by unconscious muscular exertions like those responsible for table movement. Nonetheless, in both cases, the illusion that the object (table or planchette) is moving under its own control is often extremely powerful and sufficient to convince many people that spirits are truly at work... The unconscious muscle movements responsible for the moving tables and Ouija board phenomena seen at seances are examples of a class of phenomena due to what psychologists call a dissociative state. A dissociative state is one in which consciousness is somehow divided or cut off from some aspects of the individual’s normal cognitive, motor, or sensory functions.