Heredity of Cognitive Functions and Personality in Twins
Material and Methods. In total, 139 pairs of same-sex twins were investigated. The zygosity of the twin pairs was confirmed through genotyping with 15 molecular DNA markers. Constructive thinking was assessed using the Raven test. Personality assessment was conducted using the Eysenck Personality Questionnaire (EPQ) in Lithuanian.
Results. The difference in the total number of incorrect solutions between monozygotic (MZ) and dizygotic (DZ) twin pairs younger than 15 years was not significant; however, in the group older than 15 years, this difference was found to be significant. Based on the total number of incorrect solutions, the concordance in the MZ twins was greater than in the DZ twins. The same tendency was found with cumulative EPQ scores on the extraversion scale.
Conclusions. The results imply that the quality of cognitive functions and personality traits (extraversion) can be influenced by heredity. This confirms previous findings on the heritability of cognitive factors and personality traits.
Kalasūnienė, L.; Goštautas, A.; Sinkus, A. Heredity of Cognitive Functions and Personality in Twins. Medicina 2013, 49, 50.
Kalasūnienė L, Goštautas A, Sinkus A. Heredity of Cognitive Functions and Personality in Twins. Medicina. 2013; 49(7):50.Chicago/Turabian Style
Kalasūnienė, Loreta; Goštautas, Antanas; Sinkus, Algimantas. 2013. "Heredity of Cognitive Functions and Personality in Twins." Medicina 49, no. 7: 50.