1. Objectifs

Intentions :
«Objectives of the present study were: (1) to model lifecourse models of poverty (0-12 years) corresponding to sensitive periods, accumulation of risk, and mobility models to predict hyperactivity, physical aggression and opposition at 13 years (2) to identify the lifecourse model that best describes the poverty-behavior problem link.» (p. 36)

Questions/Hypothèses :
«We hypothesized that prolonged exposure to childhood poverty and possibly exposure during sensitive periods, such as the early childhood (i.e. before age 5 years), would increase behavior problems in early adolescence. We also hypothesized that the identification of lifecourse models would differ across subtypes of behavior problems due to variations of behavior problems trajectories overtime.» (p. 36)

2. Méthode

Échantillon/Matériau :
«Data originated from the Quebec Longitudinal Study of Child Development (QLSCD) collected between 1998 and 2011. The target population was children born in 1997e1998 and whose mothers resided in Quebec, Canada (Jette and Groseilliers, 2000 ). The initial sample comprised of 2120 children aged 3-8 months (mean age 5 months).» (p. 36)

Instruments :
Questionnaire

Type de traitement des données :
Analyse statistique

3. Résumé

«This paper compared different lifecourse models and identified the model that best described poverty from birth to 12 years predicting hyperactivity, opposition and physical aggression at age 13 years. Findings revealed that association between poverty and behavior problems across the lifecourse, spanning from birth to 13 years of age, correspond to both accumulation of risk and sensitive period models. For physical aggression, the sensitive period between ages 0-3 years seemed to be the most appropriate relative to more complex models accounting for more time periods. Findings are consistent with prior research emphasising the importance of the accumulation of economic disadvantaged across the lifespan […] as well as the focus on the earliest years of life […] for behavior problems risk among adolescents and criminal behavior among adults. […] Given the importance of exposure to poverty between ages 0-3 observed in this study, interventions targeting time points during early childhood (i.e., before age 5) may have substantial benefits in reducing behavior problems in early adolescence. Recent findings in low-income populations suggest that family intervention programs initiated during early childhood are vital to reduce children’s behavior problems, including opposition and physical aggression […].» (p. 39-40)