Related Experiment Videos
Intellectual development and nutrition
Insights
Early nutritional intervention for children with kwashiorkor significantly improved full-scale IQ scores by age 8.9. Supplementary feeding enhanced verbal intelligence, while environmental factors influenced nonverbal scores.
Area of Science:
- Pediatrics
- Nutritional Science
- Developmental Psychology
Background:
- Kwashiorkor is a severe form of malnutrition.
- Malnutrition can have lasting effects on child development.
- Understanding the long-term cognitive impact of kwashiorkor and its prevention is crucial.
Purpose of the Study:
- To investigate the long-term cognitive effects of early nutritional intervention in children with a history of kwashiorkor.
- To compare cognitive outcomes between supplemented children and various control groups.
Main Methods:
- A longitudinal study involving 14 families with a history of kwashiorkor.
- One newborn per family received supplementary feeding for the first two years.
- Control groups included siblings who did not receive supplementary feeding.
- Cognitive assessments, including IQ tests, were administered around age 8.9 years.
Main Results:
- The supplementary feeding group showed significantly higher full-scale IQ scores compared to all control groups.
- No significant differences were observed in nonverbal IQ between the supplemented group and controls.
- Brain damage measures did not differentiate between the groups.
Conclusions:
- Nutritional factors, particularly early supplementary feeding, play a significant role in enhancing verbal intelligence in children recovering from kwashiorkor.
- Environmental stimulation may contribute to nonverbal cognitive development in control groups.
Abstract:
One newborn child was selected from 14 families in which kwashiorkor had occurred. Undernutrition in this test group was prevented for the first two years of life by the provision of supplementary feeding. Controls who were the siblings directly preceding each of the 14 test children received no supplementary feeding, but received medical attention and management. In each family an older child who previously had kwashiorkor (kwashiorkor group), and the nearest sibling who had received neither extra feeding nor medical management (kwasiorkor control group) were also available for comparison. A battery of psychologic tests was administered when the mean age of the test group was 8.9 years. The mean full-scale IQ of the supplementary feeding group at an average age of 8.9 years was significantly higher than that of any of the other three groups. There was no significant difference between test and control groups on nonverbal IQ. Measures of "brain damage" did not discriminate between any of the four groups. The results suggest that nutritional factors contribute especially to the elevation of verbal intelligence. Environmental stimulation (daily contact with a more alert child) apparently contributed to the elevation of the nonverbal scores of the controls.