Best known for his research in the field of human sexuality.

His "hierarchy of needs" suggest that needs are primary factors effecting motivation.

His model of emotion proposes that emotions result from Physiological arousal and the cognitive label assigned to this reaction.

Known for his work on the stress response. Found that stress was the physical stress response was the same for both positive and negative stressors.

Known for his development of personality theory, most famous for the "inferiority complex".

Believed that humans personality and behaviors are directly related to what they encounter and come into contact with. So basically, human behaviors and personalities are developed over time by their experiences.

Was the author of the Five-Factor Model inventory. Believed that personality is stable, especially after 30.

Studied stability of personality. Believes that personality is a biological trait. Along with Costa, gave us the Five-Factor Theory.

A humanistic psychologist who developed a personality theory that emphasized the importance of the self-actualizing tendency in shaping human personalities. Personality is impacted by the congruity of ideal self and a real self.

Believed that the human psyche was composed of three components: the ego, the personal unconscious, and the collective unconscious

Gave us the first theory of personality, which included three components that interacted with each other; the Id, Ego and Superego.