Two Approaches of Behavioral Genetic Research of Personality
2013, 21 (5):
With the decline of behaviorism and the development of biological technology, the behavioral genetic research of personality, which had been once disfavored for quite a long time, has been becoming more and more popular in recent years. It has been moved to the molecular genetic approach from the quantitative genetic approach. The quantitative genetic approach advocates estimating the contribution rate of heredity to the variance of personality phenotype in a population by means of some designs such as twin study and adoption study. It has done many researches on personality trait, personality disorder, attitude and preference, and so on. The molecular genetic approach aims to identify specific genes and examine the effects of them on personality phenotypes at the DNA level. It has mainly investigated the associations of genes from three specific neurotransmitter pathways (dopamine, serotonin, and noradrenaline) with personality. In the future, we should add identifying directly the specific genotype into quantitative genetic designs, pay attention to the effective integration of multi-disciplines and multi-paradigms, and expand the study of positive personality traits of healthy people. Moreover, we should explore further the deep mechanism of gene’s action on personality and emphasize the intervention research on personality at the level of molecular medicine.
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