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Is Personality Affected by Brain Activity? Abstract 122 people were tested under a condition of intermediate stimulation in order to determine whether extraverts showed less alpha activity than introverts. The independent variable was personality, i.e. introvert or extravert, and the dependent variable was alpha activity recorded in the brain. The participant's personality was determined by means of an EPI (Eysenck Personality Inventory) - a questionnaire, and alpha activity was measured by an EEG recorder under four different conditions:- * Eyes closed * Eyes open whilst performing mental arithmetic * Eyes closed after hyperventilation * Eyes open The participants were randomly selected, regardless of age, sex and religion. The only pre- requisite was that they were healthy. The results were recorded and collected as part of a class experiment and show that the sample was fairly evenly divided between introverts and extroverts. They also show that there is a slight difference between the two means from the groups, but a t-test shows that...

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