Open Access. Powered by Scholars. Published by Universities.®
Social and Behavioral Sciences Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Social and Behavioral Sciences
Transitions In Subtypes Of Withdrawn Behavior From Childhood To Adolescence: The Role Of Sports Participation, Meghan Conboy Schreck
Transitions In Subtypes Of Withdrawn Behavior From Childhood To Adolescence: The Role Of Sports Participation, Meghan Conboy Schreck
Graduate College Dissertations and Theses
Withdrawn behavior broadly describes individuals who are isolated from their peer group. Though not a clinical disorder, withdrawn behavior is a construct involved in many psychological problems, and it is likely the behavioral manifestation of distinct motivations and developmental processes. Additionally, withdrawn behavior is often used interchangeably with other psychological constructs, including shyness, social disinterest, and peer exclusion, making accurate classification difficult. In an effort to better understand the classification and developmental course of withdrawn behavior in youth, the current study used latent class analysis (LCA) and latent transition analysis (LTA) to identify distinct subclasses of withdrawn youth and to …
Predictive Modeling Of Adolescent Cannabis Use From Multimodal Data, Philip Spechler
Predictive Modeling Of Adolescent Cannabis Use From Multimodal Data, Philip Spechler
Graduate College Dissertations and Theses
Predicting teenage drug use is key to understanding the etiology of substance abuse. However, classic predictive modeling procedures are prone to overfitting and fail to generalize to independent observations. To mitigate these concerns, cross-validated logistic regression with elastic-net regularization was used to predict cannabis use by age 16 from a large sample of fourteen year olds (N=1,319). High-dimensional data (p = 2,413) including parent and child psychometric data, child structural and functional MRI data, and genetic data (candidate single-nucleotide polymorphisms, "SNPs") collected at age 14 were used to predict the initiation of cannabis use (minimum six occasions) by age 16. …