Behavior of infants with iron-deficiency anemia.

This study tested the hypothesis that infants with iron-deficiency anemia show behaviors, such as increased proximity to caregivers, increased wariness or hesitance, and decreased activity, that could contribute to "functional isolation." The behavior of 52 Costa Rican 12- to 23-month-old infants with iron-deficiency anemia was contrasted with that of 139 comparison group infants with better iron status during free play and mental and motor testing and in the home. Infants with iron-deficiency anemia maintained closer contact with caregivers; showed less pleasure and delight; were more wary, hesitant, and easily tired; made fewer attempts at test items; were less attentive to instructions and demonstrations; and were less playful. Adult behavior also differed. The results indicate that iron-deficiency anemia in infancy is associated with alterations in affect and activity, suggesting that functional isolation is a useful framework for understanding poorer developmental outcome in iron-deficiency anemia, the world's most common single nutrient deficiency.

Long-term developmental outcomes of low birth weight infants.

Advances in neonatal medicine have resulted in the increased survival of infants at lower and lower birth weight. While these medical success stories highlight the power of medical technology to save many of the tiniest infants at birth, serious questions remain about how these infants will develop and whether they will have normal, productive lives. Low birth weight children can be born at term or before term and have varying degrees of social and medical risk. Because low birth weight children are not a homogeneous group, they have a broad spectrum of growth, health, and developmental outcomes. While the vast majority of low birth weight children have normal outcomes, as a group they generally have higher rates of subnormal growth, illnesses, and neurodevelopmental problems. These problems increase as the child's birth weight decreases. With the exception of a small minority of low birth weight children with mental retardation and/or cerebral palsy, the developmental sequelae for most low birth weight infants include mild problems in cognition, attention, and neuromotor functioning. Long-term follow-up studies conducted on children born in the 1960s indicated that the adverse consequences of being born low birth weight were still apparent in adolescence. Adverse sociodemographic factors negatively affect developmental outcomes across the continuum of low birth weight and appear to have far greater effects on long-term cognitive outcomes than most of the biological risk factors. In addition, the cognitive defects associated with social or environmental risks become more pronounced as the child ages. Enrichment programs for low birth weight children seem to be most effective for the moderately low birth weight child who comes from a lower socioeconomic group. Continued research and attempts to decrease the rate of low birth weight and associated perinatal medical sequelae are of primary importance. Ongoing documentation of the long-term outcome of low birth weight children needs to be mandated, as does the implementation of environmental enrichment programs to help ameliorate the long-term consequences for infants who are born low birth weight.

Children who were very low birth weight: development and academic achievement at nine years of age.

Children born at very low birth weights (VLBW) (less than or equal to 1500 g) who were beneficiaries of modern neonatal intensive care are reaching middle childhood, and their school achievement can be evaluated. We compared 65 9-year-old children born in 1976, who were very low birth weight and who were free of neurological impairment, with 65 children of normal birth weight who had been matched for race, sex, age, and social class on measures of IQ, cognitive, visuo-motor, and fine motor abilities, and academic achievement. VLBW children scored significantly lower than controls on the WISC-R, Bender-Gestalt, Purdue Pegboard, subtests from the Woodcock Johnson Cognitive Abilities Battery, and reading and mathematics (math) achievement. Exploratory analysis of a subset of 43 VLBW and matched controls with IQ scores greater than or equal to 85 yielded a similar trend, except that, on achievement tests, differences were significant only in math. Further analyses revealed that the differential in math achievement between VLBW and control children is not fully attributable to differences in IQ.

Iron-deficient anemic infants at play.

The purpose of this study was to determine whether iron-deficient anemic infants show affective and attentional disturbances during play. The behavior of 21 iron-deficient anemic and 21 nonanemic 6- to 24-month-old Guatemalan infants and their mothers was analyzed during a videotaped 8-minute free-play session. There were no statistically significant differences between the two groups in measures of infant irritability, distractibility, or apathy. There were differences, however, in measures of spatial relations. In 71% of the anemic infants, the duration of child-initiated body contact with their mothers was high, compared with a high level of contact in only 26% of the nonanemic babies (p = 0.01). Mothers of anemic infants spent less time at a distance from them, were less likely to break close contact, and were more likely to reestablish close contact if the baby moved away (p less than 0.03). The increase in body contact was interpreted as a reflection of fearfulness, hesitance, or inactivity. The results suggest that the specific behavioral manifestations of iron deficiency anemia in infancy may vary with the context, differing in free play and structured developmental testing.

Levels of political knowledge of mildly mentally retarded adults.

The levels of political knowledge of institutionalized and noninstitutionalized retarded adults were compared with fifth- and eight-grade children and nonretarded CA-matched low SES adults. On all four knowledge indices, the retarded adults' performance closely resembled that of nonretarded fifth-grade children. The retarded subjects performed better on indices that dealt with particular leaders and state and local government information than on the more complex regime and national government indices. Results indicated that in both retarded group subjects had acquired minimal political knowledge, even though none had been exposed to any voter education.