C Lancelot | PubMed Health

PubMed1997

The association between receptive nonverbal processing abilities and internalizing/externalizing problems in girls and boys.

Social adjustment correlates of individual differences in receptive nonverbal processing abilities in boys and girls were investigated. Participants were 26 boys and 13 girls, mean age 12.04 years, who were in a custodial care institution for the treatment of a wide range of psychological difficulties. They completed the Diagnostic Analysis of Nonverbal Accuracy (DANVA; Nowicki & Duke, 1994), a standardized test of receptive nonverbal processing abilities. Trained raters used institutional records to assess the number and type of problems (internalizing or externalizing) experienced by each child. Teachers completed a social adjustment scale for each child. Girls' scores on the DANVA tests of child facial expression, child and adult facial expression combined, posture, and total DANVA accuracy as well as teacher ratings of social adjustment were significantly related to the number of externalizing problems they had. No other relations were significant. The findings suggest that receptive nonverbal processing skills may be more important for social adjustment for girls than for boys.

Adolescent↗

PubMed1991

Lack of bone accretion and amenorrhea: evidence for a relative osteopenia in weight-bearing bones.

Bone mineral density (BMD) was studied in young exercising amenorrheic girls to determine if density was compromised and the change related to injury. Ninety-eight volunteers (professional ballet dancers and controls) were studied in a cross-sectional study. Dancers and controls were further subdivided into normally cycling and amenorrheic subjects. Amenorrhea significantly lowered bone density of the spine (P less than 0.0001), wrist (P less than 0.03), and metatarsal (P less than 0.01); effects on the wrist were eliminated by controlling for age while controlling for weight eliminated all effects of amenorrhea at three sites. BMD of the metatarsal, a weight-bearing bone, showed an interaction between amenorrhea and dancing (exercising) P less than 0.035); surprisingly, dancing was associated with a further lowering of bone density. This interaction was eliminated when controlling for age, but not when controlling for weight. With multiple comparisons of the groups, spine, wrist, and metatarsal bone density was significantly lower in amenorrheic dancers when compared to normal dancers (P less than 0.05), even when controlling for age and weight in the metatarsal (P less than 0.05), and age in the spine (P less than 0.05). Estradiol levels correlated with bone density of both the wrist and the spine (r = 0.25, r = 0.23, P less than 0.02). Metatarsal density correlated with estradiol levels only in the dancers (r = 0.34, P less than 0.02). The only variable found to correlate with the occurrence of stress fractures was age of menarche. This was also the only variable of 9 (BMD of the wrist, spine or foot, calories ingested and expended, amount of calcium ingested, involvement in high energy activity, age of menarche or presence of amenorrhea) to predict stress fractures. Thus, BMD is significantly affected by the presence of amenorrhea but the effects are generally weight dependent. The compensatory increase in bone density generally seen in stressed bones, such as the metatarsal in ballet dancers, is deficient in amenorrheic premenopausal women even when controlling for weight but this effect may be age and estrogen dependent. Bone mass may not accumulate in the same manner in adolescents as in the mature women, thus putting them at risk for injury.

Adolescent↗