Cognitive dissonance is the state of psychological discomfort or tension that knowledgeable by the people who have more than two conflicting attitude, values and belief happen at same period of time. Its conception associated with self-doubt at the time of making decision. The aim of this review study is to emphasize on cognitive dissonance, reasons to cause the cognitive dissonance, cognitive dissonance theory with revisions, association between cognitive dissonance and the strategies to elimination of cognitive dissonance. The cognitive dissonance is most impactful in the social psychology in past time. The revisions of the cognitive dissonance theory emphasizes on that the cognitive dissonance arises by the function of self-concept. The cognitive dissonance caused by many reasons namely: force compliance behaviour, gain new information, during decision making and effort made by the person. The existence of cognitive dissonance increases the state of motivation in person to change the attitude. The cognitive dissonance is strongly associated with changes in attitude. The changes in behavioural, social cognitive elements, addition of new elements and avoidance of dissonance are the strategies to lessen cognitive dissonance.

The twin research has provided a deep understanding of the influence of genetic and the environment on cognitive functions. The contribution of genetic material accounted for 50-65% in the variations of working memory cognitive functions of twins. To conduct twin study 100 pairs of twins from two districts, namely: Bhiwani (N = 90) and Hisar (N = 110) of Haryana State, were taken. The working memory cognitive functions of twins were measured using the Wechsler Intelligence Scale for Children- Revised (WISC-R). Heritability estimate was used to examine the genes that contributed to shaping the cognitive functions of twins. The result of heritability estimates revealed that the heritability estimates of working memory cognitive functions namely: digit span (62%), maze (58%) and arithmetic (58%) in Bhiwani district and Hisar district, were 57%, 51% and 54% for digit span, maze, and arithmetic respectively. The findings elucidated that the working memory cognitive functions were more influenced by genetic architecture than the environmental factors. The monozygotic twins were more correlated in their general cognitive abilities than the dizygotic twins.

Early years are important for the emotional intelligence development and self-regulation of young children because of rapid brain development. Early years are time of pretending, blending fact and fiction and learning to think of world using language. There is specific attainment of mainly three components of emotional intelligence during early years of development such as expression, knowledge and regulation of emotions. They have abilities to express social and self-conscious emotions as well as recognize the emotions of other people. Self-regulation has a foundational role in promoting wellbeing across the lifespan, including physical, emotional, social, and economic health and educational achievement. Early harmonious, stimulated and enriched environment serve as driving force for the development of emotional intelligence and self-regulation skills in young children. The reactions and instructions of parents and teachers to emotions of young children are the main socialization tools that enhance the emotional intelligence and skills of self-regulation in young children.

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The contribution of genetic was ranging from 50-65% in the variations of perceptual cognitive skills of twins. The current twin study design elucidated the contribution of genetic and environment to a wide range of perceptual cognitive skills. To conduct twin study, 100 pairs of twins from two districts namely; Bhiwani (N = 90) and Hisar (N = 110) of Haryana State were taken. Genetic and environmental influences were assessed in twin study design. The perceptual cognitive skills of twins were measured using the Wechsler Intelligence Scale for Children- Revised (WISC-R). Heritability estimate was used to examine the genes contributed to shape the cognitive skills of twins. The result of heritability estimates revealed that the heritability estimates of perceptual cognitive skills namely picture completion, picture arrangement, block design and object assembly in Bhiwani district were 63%, 57%, 61% and 60% and in Hisar district were 54%, 52%, 58% and 56% respectively. The findings clearly elucidated that the perceptual cognitive skills were more influenced by genetic background than the environmental factors. The monozygotic twins were more correlated in their general cognitive abilities than the dizygotic twins.