Browsing by Author "Jones, Mark Edward"
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- Bragg grating sensor interrogation using in-line, dual-mode fiber demodulatorsJones, Mark Edward (Virginia Polytechnic Institute and State University, 1995)
- Comparing Dispositional and Episodic Assessment of Drug Use Motives among College Students: Prediction of Use and Use-Related ConsequencesJones, Mark Edward (Virginia Tech, 2007-02-12)The current study was conducted with a sample of 253 college undergraduates to extend the findings in the existing research on motivational models of alcohol and marijuana use. Specifically it was intended to evaluate the relative benefits of assessing motives for using these drugs during a specific episode rather than in the dispositional fashion utilized in virtually every existing study on the subject. Affect regulation aspects of the motivational model were further explored by measuring state (rather than trait) affect immediately preceding a use episode. A timeline follow-back method was used to identify the most recent use episode and to assess recent quantity of use and negative consequences in greater detail. The similarity of the types of motives derived from episodic assessment to those seen dispositionally lends further credence to the validity of DUM subtypes, their distinct pathways to use and related problems, and the affective-motivational model as a whole. Affective states (rather than just traits) played a significant role in the motives endorsed and outcomes. Previous findings on the direct effects of drinking to cope on the development of problems were confirmed on an episodic level. Finally, episodic assessment appeared to have some utility above and beyond that of dispositional assessment when examining specific episodes of use.
- The Role of Expectancies and Personality Factors in the Formation of Alcohol and Marijuana Use Motives among College StudentsJones, Mark Edward (Virginia Tech, 2004-05-13)Undergraduates at Virginia Polytechnic Institute and State University (N = 306) were surveyed to investigate the formation of alcohol and marijuana use motives. Based upon a hypothesized path model effect expectancies, use motives, use frequencies, and use-related problems for alcohol and marijuana were assessed via self-report. Personality factors of sensation-seeking, sociability, and neuroticism-anxiety were also assessed during this single session. Many of the hypothesized pathways were confirmed via multiple regression methods for path analysis. The findings indicated that use motives are related to theoretically more distal influences such as related personality factors and drug effect expectancies. Motives were found to consistently account for substantial variation in use and the development of problems related to alcohol and marijuana in the sample. In some cases these motives not only predicted use, but also appeared to mediate the influences of personality factors and expectancies. Finally, specific motives were found to account for significant variation in the development of substance-related problems even after controlling for the frequency of use.