Temperament Test by H.J. Eysenck

To determine the types of temperament, H.J. Eysenck developed a two-factor model, which includes extroversion and neuroticism scales. Extroversion is a characteristic of individual psychological differences between people. There are two directions, so a person either directs their energy to the external world (extroversion) or inner world (introversion).

Neuroticism is a mental state characterized by emotional instability, anxiety, excitement, poor health, and vegetative disorders. This factor is also bipolar. There are two poles: one, with positive meaning, is marked with emotional stability, and the opposite pole - with emotional instability. Emotional stability is typical for sanguine and phlegmatic people, in contrast, emotional instability is a feature of choleric and melancholic ones.

Extroverts (sanguine and choleric) are sociable but have low persistence. They often take the initiative, have flexible behavior and high social adaptability.

Introverts (phlegmatic and melancholic) are observant, distant, socially uncooperative with sufficient persistence. They tend to self-examination, find it hard to adapt to society, and focus on their feelings.