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EMERGENT LIFE SCIENCES RESEARCH - Vol 6, Issue 2, Published on 31, December 2020

Pages: 38-43
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Genetic and environmental basis of processing speed cognitive ability of twins

Author: Annu Panghal, Bimla Dhanda

Category: Research Article


Processing speed is one of the most essential fundamentals of cognitive abilities. The present investigation was formulated with the aim of the basis of genetic and environment on processing speed of cognitive abilities of twins. 100 pairs of twins with the age group 6-8 years were selected from two districts namely, Bhiwani (N=90) and Hisar (N=110) from the Haryana state. The processing speed of the cognitive abilities of twins was measured using the Wechsler Intelligence Scale for Children- Revised (WISC-R). Heritability estimate was used to analyze the genes expression on processing speed cognitive abilities of twins. The result stated that the heritability estimates for processing speed cognitive abilities of twins were 64 percent and 59 percent in Bhiwani and Hisar districts respectively. The correlation coefficient among monozygotic and dizygotic twins for processing speed cognitive ability of twins was r=0.77 and r=0.45 respectively in the Bhiwani district while in the Hisar district the correlation coefficient among the monozygotic twins and dizygotic twins was r=0.71 and r=0.42, respectively. The results also revealed that the monozygotic twins were more correlated in processing speed cognitive abilities as compared to the dizygotic twins. The processing speed cognitive abilities were more influenced by genetic basis as compared to the environmental factors.

Keywords: cognitive abilities, dizygotic twins, environment, genetic, heritability estimate, monozygotic