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Drinking expectancies and motives: a genetic study of young adult women.
Addiction. 2008 Feb; 103(2):194-204.A

Abstract

BACKGROUND

Constructs such as drinking expectancies (beliefs regarding the effects of alcohol) and motives (drinking alcohol to achieve a valued end) have been shown to be associated with various stages of alcohol use behaviors. However, little is known of the extent to which genetic and environmental influences contribute to individual differences in expectancies and motives.

METHODS

Using data from 3,656 young adult same-sex female twins, we examined the association between measures of drinking expectancies and motives and drinking behaviors. Using twin models, we estimated the extent to which genetic, shared and non-shared environmental factors influenced individual differences in expectancies and motives and also tested whether the extent of the genetic and environmental contributions on expectancies varied across abstainers and users of alcohol.

RESULTS

Expectancies predicted initiation of alcohol use. Both motives and expectancies were associated with frequency and quantity of alcohol consumption and drinks-to-intoxication. There was no evidence for heritable influences on expectancies and enhancement motives, with familial similarity for these traits being due to shared environment. Heritable influences on social, coping and conformity motives ranged from 11% to 33%. When expectancies were stratified by alcohol use, significant heritable influences (31-39%) were found for cognitive-behavioral impairment and risk-taking/negative self-perception (RT/NSP) in abstainers only, while environmental influences contributed to familial variance for other measures of expectancies in alcohol users.

CONCLUSIONS

Environmental influences (both familial and individual-specific) shape alcohol expectancies, while heritable influences may predispose to motives for drinking. Individual differences in expectancies are moderated by alcohol use, suggesting that sources of individual differences in expectancies may vary in drinkers versus abstainers.

Authors+Show Affiliations

Washington University School of Medicine, Department of Psychiatry, St Louis, MO 63110, USA. arpana@wustl.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Twin Study

Language

eng

PubMed ID

18199298

Citation

Agrawal, Arpana, et al. "Drinking Expectancies and Motives: a Genetic Study of Young Adult Women." Addiction (Abingdon, England), vol. 103, no. 2, 2008, pp. 194-204.
Agrawal A, Dick DM, Bucholz KK, et al. Drinking expectancies and motives: a genetic study of young adult women. Addiction. 2008;103(2):194-204.
Agrawal, A., Dick, D. M., Bucholz, K. K., Madden, P. A., Cooper, M. L., Sher, K. J., & Heath, A. C. (2008). Drinking expectancies and motives: a genetic study of young adult women. Addiction (Abingdon, England), 103(2), 194-204. https://doi.org/10.1111/j.1360-0443.2007.02074.x
Agrawal A, et al. Drinking Expectancies and Motives: a Genetic Study of Young Adult Women. Addiction. 2008;103(2):194-204. PubMed PMID: 18199298.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Drinking expectancies and motives: a genetic study of young adult women. AU - Agrawal,Arpana, AU - Dick,Danielle M, AU - Bucholz,Kathleen K, AU - Madden,Pamela A F, AU - Cooper,M Lynne, AU - Sher,Kenneth J, AU - Heath,Andrew C, PY - 2008/1/18/pubmed PY - 2008/6/11/medline PY - 2008/1/18/entrez SP - 194 EP - 204 JF - Addiction (Abingdon, England) JO - Addiction VL - 103 IS - 2 N2 - BACKGROUND: Constructs such as drinking expectancies (beliefs regarding the effects of alcohol) and motives (drinking alcohol to achieve a valued end) have been shown to be associated with various stages of alcohol use behaviors. However, little is known of the extent to which genetic and environmental influences contribute to individual differences in expectancies and motives. METHODS: Using data from 3,656 young adult same-sex female twins, we examined the association between measures of drinking expectancies and motives and drinking behaviors. Using twin models, we estimated the extent to which genetic, shared and non-shared environmental factors influenced individual differences in expectancies and motives and also tested whether the extent of the genetic and environmental contributions on expectancies varied across abstainers and users of alcohol. RESULTS: Expectancies predicted initiation of alcohol use. Both motives and expectancies were associated with frequency and quantity of alcohol consumption and drinks-to-intoxication. There was no evidence for heritable influences on expectancies and enhancement motives, with familial similarity for these traits being due to shared environment. Heritable influences on social, coping and conformity motives ranged from 11% to 33%. When expectancies were stratified by alcohol use, significant heritable influences (31-39%) were found for cognitive-behavioral impairment and risk-taking/negative self-perception (RT/NSP) in abstainers only, while environmental influences contributed to familial variance for other measures of expectancies in alcohol users. CONCLUSIONS: Environmental influences (both familial and individual-specific) shape alcohol expectancies, while heritable influences may predispose to motives for drinking. Individual differences in expectancies are moderated by alcohol use, suggesting that sources of individual differences in expectancies may vary in drinkers versus abstainers. SN - 0965-2140 UR - https://www.unboundmedicine.com/medline/citation/18199298/Drinking_expectancies_and_motives:_a_genetic_study_of_young_adult_women_ L2 - https://doi.org/10.1111/j.1360-0443.2007.02074.x DB - PRIME DP - Unbound Medicine ER -