Eysenck’s theory argues strongly that biological predispositions towards certain personality traits combined with conditioning and socialization during childhood in order to create our personality. This interactionist approach may, therefore, be much more valid than either a biological or environmental theory alone.

What are the 3 major dimensions of Eysenck's theory?

Eysenck’s theory of personality is based on three dimensions: introversion vs. extroversion, neuroticism vs. stability, and psychoticism vs. socialization.

What is cortical arousal in psychology?

Cortical arousal increases wakefulness, vigilance, muscle tone, heart rate, and minute ventilation.