Scott A Jones1, Ryan P Van Fossen1,2, Wesley K Thompson3, Fiona C Baker4, Duncan B Clark5, Bonnie J Nagel1,6. 1. Department of Psychiatry, Oregon Health & Science University, Portland, Oregon, USA. 2. Department of Psychology, University of South Dakota, Vermillion, South Dakota, USA. 3. Population Neuroscience and Genetics Lab, University of California, San Diego, California, USA. 4. Center for Health Sciences, SRI International, Menlo Park, California, USA. 5. Department of Psychiatry, University of Pittsburgh, Pittsburgh, Pennsylvania, USA. 6. Behavioral Neuroscience, Oregon Health & Science University, Portland, Oregon, USA.
Abstract
OBJECTIVE: Individual differences in adolescent personality are related to a variety of long-term health outcomes. While previous studies have demonstrated sex differences and non-linear changes in personality development, these results remain equivocal. The current study utilized longitudinal data (n = 831) from the National Consortium on Alcohol and Neurodevelopment in Adolescence to examine sex differences in the development of personality and the association between substance use and personality. METHOD: Participants (ages 12-21 at baseline) completed the Ten-Item Personality Inventory and self-reported past year alcohol and marijuana use at up to 7 yearly visits. Data were analyzed using generalized additive mixed-effects models and linear mixed-effects models. RESULTS: Findings support linear increases in agreeableness and conscientious and decreases in openness with age and inform on timing of sex-specific non-linear development of extraversion and emotional stability. Further, results provide novel information regarding the timing of the association between substance use and personality, and replicate past reporting of differential associations between alcohol and marijuana use and extraversion, and sex-dependent effects of marijuana use on emotional stability. CONCLUSIONS: These findings highlight the importance of modeling sex differences in personality development using flexible non-linear modeling strategies, and accounting for sex- and age-specific effects of alcohol and marijuana use.
OBJECTIVE: Individual differences in adolescent personality are related to a variety of long-term health outcomes. While previous studies have demonstrated sex differences and non-linear changes in personality development, these results remain equivocal. The current study utilized longitudinal data (n = 831) from the National Consortium on Alcohol and Neurodevelopment in Adolescence to examine sex differences in the development of personality and the association between substance use and personality. METHOD: Participants (ages 12-21 at baseline) completed the Ten-Item Personality Inventory and self-reported past year alcohol and marijuana use at up to 7 yearly visits. Data were analyzed using generalized additive mixed-effects models and linear mixed-effects models. RESULTS: Findings support linear increases in agreeableness and conscientious and decreases in openness with age and inform on timing of sex-specific non-linear development of extraversion and emotional stability. Further, results provide novel information regarding the timing of the association between substance use and personality, and replicate past reporting of differential associations between alcohol and marijuana use and extraversion, and sex-dependent effects of marijuana use on emotional stability. CONCLUSIONS: These findings highlight the importance of modeling sex differences in personality development using flexible non-linear modeling strategies, and accounting for sex- and age-specific effects of alcohol and marijuana use.
Authors: Sandra A Brown; Ty Brumback; Kristin Tomlinson; Kevin Cummins; Wesley K Thompson; Bonnie J Nagel; Michael D De Bellis; Stephen R Hooper; Duncan B Clark; Tammy Chung; Brant P Hasler; Ian M Colrain; Fiona C Baker; Devin Prouty; Adolf Pfefferbaum; Edith V Sullivan; Kilian M Pohl; Torsten Rohlfing; B Nolan Nichols; Weiwei Chu; Susan F Tapert Journal: J Stud Alcohol Drugs Date: 2015-11 Impact factor: 2.582
Authors: Megan M Herting; Cory Johnson; Kathryn L Mills; Nandita Vijayakumar; Meg Dennison; Chang Liu; Anne-Lise Goddings; Ronald E Dahl; Elizabeth R Sowell; Sarah Whittle; Nicholas B Allen; Christian K Tamnes Journal: Neuroimage Date: 2018-02-03 Impact factor: 6.556