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THE DYNAMIC RELATIONSHIP OF EMERGING ADULTHOOD AND
SUBSTANCE USE
by
Nadra Erin Lisha
A Dissertation Presented to the
FACULTY OF THE USC GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(PREVENTIVE MEDICINE: HEALTH BEHAVIOR)
May 2012
Copyright 2012 Nadra Erin Lisha
Object Description
| Title | The dynamic relationship of emerging adulthood and substance use |
| Author | Lisha, Nadra Erin |
| Author email | nadralisha@gmail.com;nadralisha@gmail.com |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Preventive Medicine (Health Behavior) |
| School | Keck School of Medicine |
| Date defended/completed | 2012-03-02 |
| Date submitted | 2012-05-02 |
| Date approved | 2012-05-02 |
| Restricted until | 2012-05-02 |
| Date published | 2012-05-02 |
| Advisor (committee chair) | Sussman, Steve |
| Advisor (committee member) |
Leventhal, Adam Rohrbach, Louise Sun, Ping John, Richard |
| Abstract | The present dissertation project examined emerging adulthood in the context of substance use behavior. It is presently recognized that individuals pass through a transitional period between adolescence and young adulthood - “emerging adulthood.” Continuation high school youth have demonstrated to show early entry into emerging adulthood-type developmental tasks. The first study examined the psychometric properties of the Inventory of Dimensions of Emerging Adulthood (IDEA) in a population of continuation high school students of Southern California. The IDEA was developed in an attempt to capture the psychosocial attributes of this unique developmental period. A 21-item version of the IDEA was evaluated, and it was determined that the measure was composed of three dimensions and demonstrated high internal consistency. In addition, construct validity was assessed and indicated that the measure, as expected, was correlated with demographic characteristics, risk behaviors, and other psychological measures. It was concluded that the IDEA is a practical instrument for measuring emerging adulthood in at-risk populations. Not every individual experiences emerging in the same fashion; emerging adulthood is characterized by its great heterogeneity. As such, the second study used a shortened 8-item IDEA measure to examine trajectories of emerging adulthood. The items were examined for factorial invariance across three time points of data collection. A shortened 5-item measure was found to be factorially invariant and was used in subsequent analysis. A latent growth curve model analysis indicated a sample that was growing in emerging adulthood status over time. Next, a latent class growth analysis was used to identify distinct trajectories. Three such trajectories were extracted from the data. These latent classes were then examined in terms of baseline characteristics as well as Time 3 behavioral outcomes. Large differences were found at baseline, but appeared to dissipate over the two-year period. These findings are expected to provide valuable implications for drug prevention programs directed at at-risk populations. It appears that this population is entering emerging adulthood earlier than other normative youth. As such, it might be beneficial to target these students earlier for risk behavior prevention efforts. Future research should examine emerging adulthood over a longer period of time, over additional developmental periods, and among diverse populations. If over longer periods of time differential outcomes are exhibited, it might be possible to distinguish these groups based on baseline characteristics, and perhaps to target those with the initial most risky trajectory. |
| Keyword | substance use; growth curve modeling; latent growth analysis; continuation high school youth; at-risk youth |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m |
| Rights | Lisha, Nadra Erin |
| Access conditions | The author retains rights to his/her dissertation, thesis or other graduate work according to U.S. copyright law. Electronic access is being provided by the USC Libraries in agreement with the author, as the original true and official version of the work, but does not grant the reader permission to use the work if the desired use is covered by copyright. It is the author, as rights holder, who must provide use permission if such use is covered by copyright. The original signature page accompanying the original submission of the work to the USC Libraries is retained by the USC Libraries and a copy of it may be obtained by authorized requesters contacting the repository e-mail address given. |
| Repository name | University of Southern California Digital Library |
| Repository address | USC Digital Library, University of Southern California, University Park Campus MC 7002, 106 University Village, Los Angeles, California 90089-7002, USA |
| Repository email | cisadmin@usc.edu |
| Archival file | uscthesesreloadpub_Volume4/etd-LishaNadra-724.pdf |
Description
| Title | Page 1 |
| Full text | THE DYNAMIC RELATIONSHIP OF EMERGING ADULTHOOD AND SUBSTANCE USE by Nadra Erin Lisha A Dissertation Presented to the FACULTY OF THE USC GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (PREVENTIVE MEDICINE: HEALTH BEHAVIOR) May 2012 Copyright 2012 Nadra Erin Lisha |
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