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Influence of malnutrition on cognitive development assessed by Piagetian tasks
D K Agarwal1, S K Upadhyay, K N Agarwal
1Department of Paediatrics, Banaras Hindu University, Varanasi, India.
Insights
Malnutrition significantly impacts cognitive development in children aged 6-8, particularly affecting reasoning and comprehension. Undernutrition hinders performance on cognitive tasks, especially conservation tasks, indicating a need for nutritional interventions.
Area of Science:
- Child Development
- Nutritional Science
- Cognitive Psychology
Background:
- Cognitive development is crucial for children's learning and problem-solving abilities.
- Nutritional status is a key determinant of overall child health and development.
- Understanding the interplay between nutrition and cognitive function is vital for early intervention strategies.
Purpose of the Study:
- To investigate the relationship between nutritional status and cognitive development in children aged 6-8 years.
- To assess the impact of undernutrition on specific cognitive tasks during the concrete operational period.
- To explore potential environmental influences on cognitive development in rural children.
Main Methods:
- Assessed cognitive development using seven Piagetian tasks and the Wechsler Intelligence Scale for Indian Children.
- Evaluated 1336 children aged 6-8 years, categorizing them by nutritional status (malnourished vs. well-nourished).
- Employed regression analysis to determine the association between nutrition, environmental factors, and cognitive performance.
Main Results:
- Malnourished children were disproportionately represented in the preoperational stage, while well-nourished children were more advanced (concrete operational stage).
- Undernutrition negatively affected boys' performance on most cognitive tasks, and girls' performance on conservation and ordinal relation tasks.
- Nutrition was weakly associated with poor performance, with a more pronounced effect on conservation tasks, suggesting impaired verbal reasoning and comprehension in malnourished children.
Conclusions:
- Nutritional status is a significant factor influencing cognitive development in school-aged children.
- Malnutrition, particularly affecting conservation tasks, indicates potential deficits in verbal reasoning and comprehension.
- Environmental factors showed no significant influence, possibly due to limited variability within the study population.
Abstract:
Cognitive development of 1336 children (6-8 yr) was studied in relation to their nutritional status. Seven Piagetian tasks covering the mental process of a concrete operational period were given to each child to assess the cognitive development. Weschler intelligence scale for Indian Children was used to assess the IQ of each child. The percentage of malnourished children in stage I of development (preoperational) was significantly higher as that of wellnourished children. A higher percentage of children in the latter group was in stage III of development (concrete operation). In boys performance on all the tasks was influenced by undernutrition except for class inclusion. In girls this was true only for conservation of liquid, substance and ordinal relation. The results of the regression analysis showed that nutrition was the only factor weakly associated with the poor performance of the children in various tasks. Further, the effect of nutrition was more pronounced in conservation tasks indicating poor verbal reasoning and comprehension in malnourished children. Information was also collected regarding the parental education and occupation, socio-economic status, caste, economic sufficiency, psychosocial stimulation and home environment. However, these environmental factors did not influence the development of rural children. This might be due to the fact that the population in the present study did not vary much with regard to these variables.