Cortical Arousal Theory

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To begin with, there are areas of weakness pertaining to the research and measurement of trait theory. Even though Eysenck himself is aware of these, they nevertheless remain troublesome. For example, in investigating the links between individual responses and cortical arousal (Eysenck, 1991), he points out that "different systems of cortical arousal are activated in different people" (p. 90). Some individuals may respond with excessive sweating, while others respond with increased breathing. In other words, how could one be sure which arousal system is activated in a particular individual at a specific time? To put it simply, a particular theory may not be supported because the wrong measuring instrument was used (Eysenck, 1991, p.

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