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Author: Annu × End date: 2022 × Start date: 2022 × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Twin Study on Empirical Intervention to Unravel Nature and Nurture of Intelligence
    (Chaudhary Charan Singh Haryana Agricultural University hisar, 2022-09) Annu; Dhanda, Bimla
    The aim of present twin study was to assess the influence of genetic and environment on intelligence of twins. A sample of 150 pairs of twins in the age groups of 3-6 years was attained from 55 villages of Bhiwani district and Hisar district of Haryana state. Intelligence of twins was assessed with help of Stanford Binet Intelligence Scale (Terman and Merrill, 1960), whereas home environment of twins was assessed by using the Home Observation for Measurement of the Environment (HOME) (Caldwell and Bradley, 1984) and preschool environment of twins assessed with the help of Early Childhood Environment Rating Scale (Thelma et al. 2005). The findings on heritability estimates showed that the influence of genetic on intelligence of twins was more than the environment in both districts. The results of heritability estimates also revealed that the contribution of genetic on intelligence of twins was more in the age group 5-6 years followed by 4-5 years and 3-4 years. The significant associations of intelligence were found with the variables, namely, mother‘s education and occupation, father‘s education and occupation, family size, family income and caste of twins boosted the intelligence of twins. The preschool environment of twins was also significantly associated with intelligence of twins in both Bhiwani and Hisar district. The intervention programme was also enhanced the intelligence of twins from 3-6 years in both Bhiwani and Hisar district. The twin research clearly concluded as the influence of genetic on intelligence of twins was more as compared to environmental factors and impact of genetic increases with increase in age of twins. Home environment of twins was also influential factor for the development of intelligence in twins of both districts.