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Problem-Solving Before Instruction (PS-I): A Protocol for Assessment and Intervention in Students with Different Abilities

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Methodological challenges examining subgroup differences: examples from universal school-based youth violence

Albert D Farrell¹, David B Henry, Amie Bettencourt

¹Department of Psychology, Virginia Commonwealth University, P.O. Box 842018, Richmond, VA 23284-2018, USA. afarrell@vcu.edu

Prevention Science : the Official Journal of the Society for Prevention Research

|January 29, 2011

Summary

Investigating subgroup differences in school violence prevention requires careful methodology. This review highlights challenges like selecting moderators and reporting effect sizes for accurate, equitable intervention outcomes.

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Area of Science:

Public Health
Developmental Psychology
Criminology

Background:

School-based universal violence prevention programs aim to reduce harm.
Investigating differential effects across subgroups is crucial for equitable impact.
Methodological limitations hinder accurate assessment of these subgroup differences.

Purpose of the Study:

To review the literature on school-based violence prevention.
To identify key methodological challenges in analyzing subgroup differences.
To provide recommendations for future research in this area.

Main Methods:

Literature review of school-based universal violence prevention programs.
Analysis of methodological issues concerning subgroup moderation.
Illustration with examples from youth violence prevention research.

Main Results:

Identified issues include: lack of theoretical basis for moderators, inflated Type I errors, absence of moderation tests, restricted range issues, failure to report effect sizes, confounding factors, and multi-level ecological factors.
Examples from youth violence prevention highlight individual, school, and community moderators.
Methodological rigor is needed to understand varied prevention effects.

Conclusions:

Recommends using the social-ecological model for theory-driven confirmatory research on subgroup differences.
Suggests qualitative research to identify factors influencing subgroup intervention effectiveness.
Emphasizes reporting effect sizes and confidence intervals for prevention studies.