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This paper attempts to highlight ongoing concerns in understanding the relations between malnutrition and cognition and the availability of knowledge to address such concerns. At the present time, there is insufficient information available to provide definitive answers to questions of processes, mechanisms and outcomes, but we are much closer to being able to design studies that will provide better answers to such questions. From the review presented here it can be argued that future research should:
1. Imbed within the design appropriate questions of processes and collect data that would illustrate links between malnutrition and behavior. For example, data from correlational studies should be specific enough to provide clues to actual behaviors that may mediate cognitive changes.
2. Conceptualize potential interactions among variables that may be particularly relevant to the population under study. Researchers need not consider every possible interaction but rather target data collection efforts to test explicitly defined interactions.
3. Include studies of children beyond the ages typically considered sensitive. Available evidence, although limited, suggests that these children can respond to improved nutrition, and the implications for large numbers of children not currently targeted for interventions (i.e., school-age children) would be significant.
4. Include outcome measures that may be sensitive to nutritional manipulations. Cognitive change and school learning are mediated by affective and motivational variables that may be particularly sensitive to nutritional status.
A paper such as this would be remiss without a discussion of policy. In short, we can state that malnutrition has detrimental effects on infants, young children and school-age children that can be improved by better diets. At the same time, our understanding of the complex relations between poverty, malnutrition and child development is still incomplete, and many questions remain. It is certain that for children in developing countries to reach their potential, not only will their diets need to be improved but so will the conditions in which they live. Attention to diet, both quality and quantity, will be enhanced by attention to health, infection, education, socioeconomic status and other conditions of poverty.
Chavez, A., Martinez, C. & Yaschine, T. (1975) Nutrition, behavioral development, and mother-child interaction in young rural children. Federation Proceedings, Vol. 34, No. 7.
Freeman, E., Klein, R. E., Townsend, J. W. & Lechtig, A. (1980) Nutrition and cognitive development among rural Guatemalan children. Am J Pub Health 70:1277-1285.
Grantham-McGregor, S. M., Powell, C. M., Walker, S. P. & Himes, J. H. (1991) Nutritional supplementation, psychosocial stimulation, and mental development of stunted children: the Jamaican study. Lancet 338(8758): 1-5.
Haskins, R. (1989) Beyond Metaphor: The efficacy of early childhood education. American Psychologist 44: 274-282.
Husaini, M. A., Karyadi, L., Husaini, Y. K., Sandjaja, Karyadi, D. & Pollitt, E. (1991) Developmental effects of short-term supplementary feeding in nutritionally-at-risk Indonesian infants. Am J Clin Nutr 54: 799-804.
Joos, S. K., Pollitt, E., Mueller, W. H. & Albright, D. L. (1983) The Bacon Chow Study: Maternal nutritional supplementation and infant behavioral development. Child Dev 54: 669-676.
Klein, R. E., Arnales, P., Delgado, H., Engle, P. Guzman, G., Irwin, M. Lasky, R., Lechtig, A., Martorell, R., Mediá Pivaral, V., Russell, P. & Yarbrough, C. (1976) Effects of maternal nutrition on fetal growth and infant development. Bull. Pan Am. Health Organiz. 10:301-316.
McKay, H., Sinisterra, L., McKay, A, Gomez, H. & Lloreda, P. (1978) Improving Cognitive Ability in Chronically Deprived Children. Science, Vol. 200.
Pollitt, E. (1988) A critical view of three decades of research on the effects of chronic energy malnutrition on behavioral development. In: Chronic Energy Deficiency: Consequences and Related Issues (Schürch, B. & Scrimshaw, N. S. eds.), Proceedings of the International Dietary Energy Consultative Group meeting held in Guatemala City, Guatemala. Nestle Foundation, Lausanne, Switzerland.
Pollitt, E., Gorman, K. S., Engle, P., Martorell, R. & Rivera, J. (1993) Early supplementary feeding and cognition: effect over two decades. Monogr. Soc. Res. Child Dev. 58(7), Serial No. 235.
Pollitt, E. & Oh, S. (1994) Early supplementary feeding, child development and health policy. Food Nutr. Bull. 15(3): 208-214.
Rush, D., Stein, Z. &- Susser, M. (1980) Diet in pregnancy: a randomized controlled trial of nutritional supplements. Alan R. Liss, Inc., New York, NY.
Stephenson, L. S. (1989) Urinary Schistosomiasis and malnutrition. Clin Nutr 9: 256-264.
Stephenson, L. S., Latham, M., Kurz, K., Kinoti, S., & Brigham, H. (1989) Treatment with a single dose of albendazole improves growth of Kenyan schoolchildren with hookworm, trichuris trio-chiura, and ascaris lumbricoides infections. Am J Trop Med Hyg 411(1): 78-87.
Townsend, J. W., Klein, R. E, Irwin, M. H., Owens, W., Yarbrough, C. & Engle, P. L. (1982) Nutrition and preschool mental development. In: Cross-Cultural Perspectives on Child Development (Wagner, D. A. & Stevenson, H. W., eds.). Freeman, San Francisco, CA.
Waber, D. P., Vuori-Christiansen, L., Ortiz, N., Clement, J. R., Christiansen, N. E., Mora, J. O., Reed, R. B., Herrera, M. G. (1981) Nutritional supplementation, maternal education, and cognitive development of infants at risk of malnutrition. Am J Clin Nutr 34: 807-813.
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