Impact of Genetic and Environment on Vocabulary Acquisition Intellectual Aspect of Twins during Early Childhood.

Vocabulary acquisition is the fundamental aspect of intelligence and is the process of learning new words. The classical twin study provided robust information regarding the contribution of genetics and environmental propensities on the vocabulary acquisition of twins. The twin study has been planned with the objective to assess the impact of genetics and environment on vocabulary acquisition ability. This investigation was performed in the Bhiwani and Hisar districts of Haryana. A sample of 150 pairs of twins in the age groups of 3-6 years was attained from 55 villages of two districts. Results of heritability estimates showed that the contribution of genetics for vocabulary acquisition ability ranged from 51-60% for 3-6 years. The conclusion of heritability estimates indicated that the impact of genetic factors on vocabulary acquisition ability of twins was more than the environmental factors. [ABSTRACT FROM AUTHOR]