The study suggested that genes have a positive relationship between personality traits and happiness traits, similar to the relationship of comorbidity in psychopathy.

In a more recent study by Matsunaga et al. (2018), certain gene receptors have been found to play a role in the perception of one's happiness as they directly impact emotional processing and other physiological processes such as appetite regulation, evaluation of self and others, and memory.

Personality

Through factor analysis,

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