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Related Experiment Videos

The multilevel structure of four adolescent problems.

Keith Smolkowski1, Anthony Biglan, Clyde Dent

  • 1Oregon Research Institute, 1715 Franklin Boulevard, Eugene, Oregon, 97403-1983, USA. keiths@ori.org

Prevention Science : the Official Journal of the Society for Prevention Research
|June 15, 2006
PubMed
Summary

Individual adolescent behaviors, including substance use and academic performance, show significant variability. School and grade-level cohort effects explain less than 4% of this variance, highlighting the importance of individual factors in adolescent development.

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Area of Science:

  • Adolescent Psychology
  • Educational Research
  • Public Health

Background:

  • Understanding variability in adolescent behaviors is crucial for effective interventions.
  • Previous research has focused on school-level factors, but individual differences are substantial.

Purpose of the Study:

  • To examine the sources of variability in adolescent self-reported behaviors.
  • To differentiate between individual, school, and cohort-level influences on adolescent behavior.

Main Methods:

  • Analysis of a large-scale, population-based survey of 60,837 adolescents (8th and 11th graders) over three years.
  • Examination of four key behaviors: substance use, antisocial behavior, depression, and academic performance.
  • Statistical assessment of variance at individual, school, and grade-level cohort levels.

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Main Results:

  • Individual-level factors account for at least 96% of the variance in adolescent behaviors.
  • Schools exhibit temporal variability, but not always systematically.
  • Grade-level cohorts explain some variance within schools, but combined school and cohort effects are minimal (≤4%).

Conclusions:

  • Interventions targeting specific communities based solely on high adolescent problem rates may be inefficient.
  • Individual differences are the primary drivers of adolescent behavior variability.
  • Cohort variability, rather than interventions, might explain apparent improvements in non-experimental studies.