Extending prior alcohol expectancy measurement research, this researcher (McMurray, 2013) recently developed the Pharmacological and Social Alcohol Expectancy Scale (PSAES). The PSAES is the only alcohol expectancy measure to date that provides adequate coverage of both social expectancies and the anticipated positive pharmacological effects resulting from alcohol consumption, and was developed and validated in a sample of young adults (aged 18-23). Research has shown that adolescents at high risk for alcohol use disorder (AUD) hold higher expectations of reward from alcohol, suggesting that expectancy patterns may help distinguish at-risk youth. Building upon the previous PSAES validation study, the primary purpose of the current study was to examine whether a version of the PSAES adapted for adolescents (the PSAES-A) provided a valid measure of pharmacological and social alcohol expectancies in adolescents. Results demonstrated that a respecified model of the PSAES-A adequately fit the proposed two-dimensional factor structure and provided justification for the items representing two distinguishable domains: social and pharmacological. The PSAES-A was then used to 1) examine patterns of alcohol expectancies and drinking behaviors in adolescents and 2) investigate whether risk (e.g., sensation seeking personality) was differentially associated with pharmacological and social expectancies in adolescents. Results indicated that pharmacological and social expectancies were differentially associated with various drinking behaviors (e.g., quantity, frequency) and that sensation seeking was significantly associated with both social and pharmacological expectancies in adolescents. The fact that alcohol expectancies differentially predicted quantity and frequency of drinking suggests that different expectancy processes affect adolescent’s decisions about how often they drink versus how much alcohol they consume on a given occasion. Implications and limitations are discussed.

Despite over 30 years of research investigating alcohol expectancies, they have never been examined in terms of the anticipated pharmacological versus social rewards resulting from alcohol consumption, and both appear to play a central role in drinking motivation and behavior. The purpose of this study was to develop a two-dimensional instrument designed to assess both the pharmacological alcohol expectancies of pleasurable, internal states that result from alcohol consumption, as well as the social expectancies that drinking alcohol will result in higher social status and increased effectiveness in social situations. This measure, called the Pharmacological and Social Alcohol Expectancy Scale (PSAES), was developed and validated in a college sample using a two-phase design with three separate samples. Phase I results demonstrated that a respecified model of the PSAES adequately fit the proposed two-dimensional factor structure and provided justification for the items representing two distinguishable domains: social and pharmacological. The measure was then used to 1) assess patterns of drinking expectancies at various drinker levels and 2) investigate whether known risk factors for alcohol use disorders differentiate scores on the two factors. Phase II results indicated that pharmacological and social expectancies are both significantly positively associated with drinking behavior, and that sensation-seeking is significantly associated with pharmacological expectancies. The PSAES represents the first alcohol expectancy instrument to provide adequate coverage of pharmacological expectancies. Implications and limitations are discussed.