According to Eysenck's research,extraverts have lower levels of ____ than introverts.

A) hostility
B) cortical arousal
C) self-esteem
D) guilt feelings

Eysenck's theory proposes that extraverts have lower levels of cortical arousal in comparison to introverts. This means that extraverts have a lower threshold for stimulation, which leads them to seek out more external stimulation, social interaction, and excitement in their surroundings. In contrast, introverts have a higher threshold for stimulation, leading them to prefer quieter and less stimulating environments.