1. Objectifs

Intentions :
Estimer l’importance des corrélations entre fraterie, pairs, voisinage et collègues d’école dans le développement de l’adolescent.

2. Méthode

Échantillon/Matériau :
« Our data from the National Longitudinal Study of Adolescents in grades 7 through 12 in 132 U.S. schools in 1995 (Bearman, Jones, and Udry 1997) [...]. A random sample of some 200 students from each high school/feeder school pair was then selected for in-home interviews and produced the core in-home sample about 12, 000 adolescents. A number of special samples (e.g., ethnic and genetic) were also selected on the basis of in-school responses. The core plus the special samples produced a total sample size of 20, 745 adolescents in Wave 1. » (p. 440)

Instruments :
- Measures of achievement (the Add Health Picture Vocabulary Test)
- Measures of behavior (a delinquency scale)
- Interviewer-measured height

Type de traitement des données :
Analyse statistique

3. Résumé

« We use nationally representative data to calculate correlations in achievement and delinquency between genetically differentiated siblings within a family, between peers as defined by adolescents’ ''best friend'' nominations, between schoolmates living in the same neighborhood, and between grademates within a school. We find the largest correlations between siblings, especially identical twins. Grademate and neighbor correlations are small. Peer-based correlations are considerably larger than grademate and neighbor correlations but not larger than most sibling correlations. The data suggest that family-based factors are several times more powerful than neighborhood and school contexts in affecting adolescents’ achievement and behavior. » (p. 437)