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From Tibetan Buddhist Encyclopedia
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Personality is the particular combination of emotional, attitudinal, and behavioral response patterns of an individual.Different personality theorists present their own definitions of the word based on their theoretical positions. Psychologists such as Freud, and Ericksonhave attempted to come up with personality theories.

The study of personality started with Hippocrates' four humours and gave rise to four temperaments. The explanation was further refined by his successor Galen during the second century CE. The "Four Humours" theory held that a person's personality was based on the balance of bodily humours; yellow bile, black bile, phlegm and blood. Choleric people were characterized as having an excess of yellow bile, making them irascible. High levels of black bile was indicative of melancholy and pessimism. Phlegmatic people were thought to have an excess of phlegm, leading to their sluggish, calm temperament. Finally, people thought to have high levels of blood were said to be sanguine and were characterized by their cheerful, passionate dispositions.

Personality is usually broken into components called the Big Five, which are openness to experience, conscientiousness, extroversion, agreeableness, and neuroticism (or emotionality). These components are generally stable over time and appear to be attributable to a person’s genetics rather than the effects of one’s environment.


Some research has investigated whether the relationship between happiness and extraversion seen in adults can also be seen in children. The implications of these findings can help identify children that are more likely to experience episodes of depression and develop types of treatment that such children are likely to respond to. In both children and adults, research shows that genetics, as opposed to environmental factors, exert a greater influence on happiness levels. Personality is not believed to become stable until the age of thirty but personality constructs in children are referred to as temperament. Temperament is regarded as the precursor to personality. Whereas McCrae and Costa’s Big Five Model assesses personality traits in adults, the EAS model is used to assesses temperament in the children. This model measures levels of emotionality, activity, sociability and shyness in children. The EAS model in children is believed to be the equivalent for the Big Five model in adults. Findings show that high degrees of sociability and low degrees of shyness are equivalent to adult extroversion and are also correlated with higher levels of life satisfaction in children.

Another interesting finding has been the link found between acting extroverted and positive affect. Extroverted behaviors include acting talkative, assertive, adventurous and outgoing and for the purposes of this study, positive affect is defined as experiences of happy and enjoyable emotions. This study investigated the effects of acting in a way that is counter to a person’s dispositional nature. In other words, the study looked at the benefits and drawbacks of introverts (people who are shy, socially inhibited and non-aggressive) acting extroverted and extroverts acting introverted. After acting extroverted, introverts’ experience of positive affect increased whereas extroverts seemed to experience lower levels of positive affect and suffered from the phenomenon of ego depletion. Ego depletion, or cognitive fatigue is the use of one’s energy to overtly act in a way that is contrary to one’s inner disposition. When a person acts in a contrary fashion, he diverts most, if not all, (cognitive) energy toward regulated this foreign style of behavior and attitudes. Because all available energy is being used to maintain this contrary behavior, the result is the inability to use any energy to make important or tough decisions, plan for the future, control or regulate emotions, or perform effectively on other cognitive tasks.


One question that has been posited is why extroverts tend to be happier than introverts. Two types of explanations attempt to account for this difference: the instrumental theories and temperamental theories. The instrumental theory suggests that extraverts end up making choices that place them in more positive situations and they also react more strongly than introverts to positive situations. The temperamental theory suggests that extroverts have a disposition that generally leads them to experience a higher degree of positive affect. In their study of extroversion, Lucas and Baird found no statistically significant support for the instrumental theory but did, however, find that extraverts generally experience a higher level of positive affect.

Research has also been conducted to uncover some of the mediators that are responsible for the correlation between extroversion and happiness. Self-esteem and self-efficacy are two such mediators. Self-efficacy has been found to be related to the personality traits of extroversion and subjective well-being. Self-efficacy is one’s belief about abilities to perform up to personal standards, the ability to produced desired results, and the feeling of having some ability to make important life decisions. However, the relationship between extroversion (and neuroticism) and subjective happiness is only partially mediated by self-efficacy. This implies that there are most likely other factors that mediate the relationship between subjective happiness and personality traits. Another such factor may be self-esteem. It seems that individuals with a greater degree of confidence about themselves and their abilities have both a higher degree of subjective well-being and a higher level of extroversion.

Other research has examined the phenomenon of mood maintenance as another possible mediator. Mood maintenance, the ability to maintain one’s average level of happiness in the face of an ambiguous situation (meaning a situation that has the potential to engender either positive or negative emotions in different individuals), has been found to be a stronger force in extroverts. This means that the happiness levels of extroverted individuals are less susceptible to the influence of external events. Another implication of this finding is that extroverts’ positive moods last longer than those of introverts.