Single- and cross-commodity delay discounting of money and e-cigarette liquid in experienced e-cigarette users

•E-cigarette liquid was discounted at a steeper rate than money.•E-cigarette users discount mL vs. mL, M vs. M, and mL vs. M in descending order.•Significant correlations between SCD and CCD discounting rates were found.•Both SCD tasks were significantly associated with attempts to quit vaping. Dela...

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Bibliographic Details
Published in:Drug and alcohol dependence 2020-01, Vol.206, p.107740-107740, Article 107740
Main Authors: Pericot-Valverde, Irene, Yoon, Jin H., Gaalema, Diann E.
Format: Article
Language:English
Subjects:
Adult
Commodities
Cross-commodity discounting
Delay
Delay Discounting
Discounting
Drug abuse
E-cigarettes
Electronic cigarettes
Electronic Nicotine Delivery Systems - economics
Female
Flavoring Agents - economics
Humans
Impulsive Behavior
Impulsivity
Male
Money
Nicotine
Reinforcement, Psychology
Reward
Secondary analysis
Single-commodity discounting
Smoking
Substance abuse
Tobacco
Vaping - economics
Vaping - psychology
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Summary:•E-cigarette liquid was discounted at a steeper rate than money.•E-cigarette users discount mL vs. mL, M vs. M, and mL vs. M in descending order.•Significant correlations between SCD and CCD discounting rates were found.•Both SCD tasks were significantly associated with attempts to quit vaping. Delay discounting (DD) research has improved our understanding of important behavioral processes associated with tobacco use. Little research has explored DD among e-cigarette users, and these studies have exclusively examined money as the only available commodity. This secondary analysis of a laboratory study explored discounting for money and e-liquid among e-cigarette users using two single-commodity discounting (SCD) tasks and one cross-commodity discounting (CCD) task. A secondary goal was to explore the extent to which results from the SCD and CCD tasks were correlated to each other and with measures of e-cigarette use. E-cigarette users (N = 27) completed two SCD tasks and one CCD task. The SCD tasks assessed choices between various amounts of either money now versus money later (M-M) or e-liquid now versus e-liquid later (mL-mL). The CCD task assessed choices between e-liquid now versus money later (mL-M). Discounting results were compared using logk and AUClog. Discounting was greatest in the mL-mL task, followed by the M-M task, and then the mL-M task. AUClog and logk were significantly correlated across all discounting tasks. Attempts to quit vaping was positively associated with logk and negatively associated with AUClog and in both SCD tasks. E-cigarette users discount e-liquid more than money in a SCD task. However, when the two commodities, money and e-liquid (CCD), are compared the substance of abuse is discounted to a lesser extent. Interventions that provide alternative reinforcers to compete with the reinforcing effects of nicotine intake may be especially indicated for treating e-cigarette dependence.
ISSN:0376-8716
1879-0046
DOI:10.1016/j.drugalcdep.2019.107740