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Methodology Methodology
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Results Results
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Does the Conceptualization of Externalizing Behavior Affect Identification of Statistical Trajectories? Does the Conceptualization of Externalizing Behavior Affect Identification of Statistical Trajectories?
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Does Sample Size Affect Statistical Identification of Trajectories? Does Sample Size Affect Statistical Identification of Trajectories?
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Does Number of Assessments Affect Statistical Identification of Trajectories? Does Number of Assessments Affect Statistical Identification of Trajectories?
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Does Developmental Period Affect Statistical Identification of Trajectories? Does Developmental Period Affect Statistical Identification of Trajectories?
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Does Gender Affect the Statistical Identification of Trajectories? Does Gender Affect the Statistical Identification of Trajectories?
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Does the Informant Affect Statistical Identification of Trajectories? Does the Informant Affect Statistical Identification of Trajectories?
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Discussion Discussion
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Future Directions Future Directions
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CHAPTER 14 Group-Based Trajectory Modeling of Externalizing Behavior Problems from Childhood through Adulthood: Exploring Discrepancies in the Empirical Findings
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Published:January 2009
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Abstract
The purpose of this chapter is to investigate whether there are systematic factors that may help explain the large discrepancy in findings from group-based trajectory modeling studies of offending. Inspired by both theoretical work (Moffitt, 1993) and advancements in statistical methodology (e.g., Nagin & Tremblay, 1999), scholars of the development of antisocial behavior are increasingly studying the various trajectories of antisocial behavior from childhood through adulthood. Ample evidence suggests that there are at least two different trajectories (childhood-onset and adolescent-onset) but findings from various studies suggest that there are anywhere from two to seven trajectories of antisocial behavior. This chapter identifies several methodological factors that might be associated with finding various numbers of trajectories, and conduct a systematic review of studies to see if this is the case. It finds that the conceptualization of externalizing behavior problems, the number of assessments, the length of follow-up, the gender of subjects, and whether studies employed multimethod/multiinformant designs are all associated with the number of trajectories identified.
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