One of the most commonly used drugs among adolescents is alcohol. In 2015, 45% of Dutch adolescents aged 12–16 years had consumed alcohol at least once in the past month, 24% had been drunk or tipsy at least once and 18% had been involved in binge drinking (five or more alcoholic drinks in one session). Among 16-year-olds, these percentages are notably higher; respectively 76%, 55% and 44% [1]. Adolescent alcohol use is associated with alcohol problems in adulthood [2] and problem behavior in middle and high school, such as early school leaving, violent and delinquent behavior, sexual risk behavior and co-morbid substance use [3–6]. Additionally, drinking at an early age can have damaging effects on adolescent brain development, especially on learning and attention abilities [7]. Because of these negative outcomes, it is important to prevent and reduce adolescent alcohol use. Since self-control has a direct influence on adolescent alcohol use (e.g.,[8]) and given the possibility to improve this individual characteristic [9], alcohol-specific self-control may be an important factor to target in preventing and reducing adolescent alcohol use.
Self-control is considered individual characteristic that reflects the ability to control and adjust thoughts, emotions and behavioral tendencies, and refrain from acting on them in order to achieve a goal or conform to standards [10, 11]. It includes capacities such as emotion regulation, thought suppression, temptation resistance and behavior modification [10]. A theory that identifies self-control as the key concept in understanding risk behavior among adolescents is the self-control theory by Gottfredson and Hirschi [12]. This theory assumes that individuals with low levels of self-control are more likely to engage in risk behavior, such as alcohol use, because they have a greater likelihood to react to stimuli in the environment that make them overstep their norms [13]. Particularly in adolescence, high self-control can play an important role in preventing engagement in and reducing risk behavior [14, 15].
In the literature a distinction is made between general self-control, which is assumed to affect behaviors across different domains [10, 16], and domain-specific self-control, such as alcohol-specific self-control, which refers to the ability to refrain from drinking alcohol [17–19]. A number of studies suggest that both general self-control and alcohol-specific self-control are related to adolescent alcohol use (e.g., [18, 20, 21]). However, to our knowledge, it has not yet been investigated whether the relationship between general self-control and adolescent alcohol use is mediated by alcohol-specific self-control, and whether this mediating role is domain-specific.
Domain-specific self-control implies that an individual can have high self-control in one domain (e.g., substance use) and at the same time low self-control in another domain (e.g., sexual risk behavior, digital media use; [16]). However, little is known about the extent to which this domain-specific self-control is actually specific for a specific domain. Research suggests that the level of self-control in one domain can be predictive for the level of self-control in another domain [9, 16]. This research thereby implies that distinguishing between general self-control and domain-specific self-control may not be meaningful. Furthermore, alcohol-specific self-control implies that it is specifically related to alcohol use and not to the use of other substances or addictive behaviors. This study examines the specificity of alcohol-specific self-control by investigating whether it mediates the effect of general self-control on adolescent alcohol use or generalizes to also mediate the effect of general self-control on adolescent digital media use and/or smoking. The answer to this question has important implications for the use of alcohol-specific self-control in the explanation of adolescent alcohol use and for the content and efficiency of alcohol-related interventions.
General Self-Control and Adolescent Alcohol Use
A wide range of empirical studies examined the relationship between general self-control and adolescent alcohol use and revealed that high general self-control is an important protective factor for several alcohol-related outcomes [8, 18, 20–31]. Longitudinal studies have demonstrated the effects of general self-control on adolescents’ alcohol use. For example, Kwon [27] found that the level of general self-control at age 11 predicted the frequency of alcohol use at age 15. Moreover, in a sample of Dutch adolescents, higher general self-control at age 13 predicted a lower frequency and quantity of alcohol consumption one year later [26]. Hence, the literature converges to suggest that a higher level of self-control is associated with lower levels of alcohol use among adolescents.
Alcohol-Specific Self-Control and Adolescent Alcohol Use
Next to general self-control, previous research also provides evidence for a relationship between alcohol-specific self-control and adolescent alcohol use. Though most studies were conducted among college students (e.g. [31, 32], among high school students too higher alcohol-specific self-control was associated with less alcohol use [17, 21]. Moreover, a longitudinal study found that alcohol-specific self-control predicted the frequency and quantity of drinking among high school students one year later [33]. Thus, although longitudinal evidence among high school students is scarce, existing findings indicate that a higher level of alcohol-specific self-control is associated with less adolescent alcohol use.
General Self-Control, Alcohol-Specific Self-Control and Adolescent Alcohol Use
Though both general and alcohol-specific self-control relate to adolescents’ drinking, alcohol-specific self-control may be a proximal factor that accounts for the more distal influence of general self-control on adolescent alcohol use. To our knowledge, the mediating role of alcohol-specific self-control in the relationship between general self-control and adolescent alcohol use has not yet been examined. However, Lindgren et al. [18] investigated the unique influence of both general and alcohol-specific self-control on multiple alcohol outcomes among college students. Both types of self-control were related to more favorable outcomes, but the association with alcohol-specific self-control was stronger than the association with general self-control. This indicates that alcohol-specific self-control may be a more proximal factor and general self-control a more distal factor of alcohol use. Additionally, Lindgren and colleagues found that general self-control was positively related to alcohol-specific self-control [18]. However, due to the cross-sectional design of their study, no conclusion could be drawn about the direction of the effect. Adolescents with higher general self-control have less difficulty in resisting temptations in general, because they are better able to foresee the long-term costs of their behavior [10]. Thus, we expect that adolescents with higher general self-control have higher alcohol-specific self-control, because they can resist the temptation of drinking, which in turn, leads to less alcohol consumption [33]. So, we hypothesize that the effect of general self-control on adolescent alcohol use can (partially) be explained by alcohol-specific self-control.
Specificity of Alcohol-Specific Self-Control
Little research has been conducted on the specificity of alcohol-specific self-control. One study examined whether alcohol-specific self-control is related to alcohol use and other behaviors such as smoking, caffeine consumption and exercise behavior [19]. The findings showed that alcohol-specific self-control did not predict these other behaviors, but it did predict the quantity of alcohol consumption. This supports the idea that alcohol-specific self-control is domain-specific as well as substance-specific. However, cross-sectional data were used and the participants in the study were first-year psychology students (mean age 20 years; [19]. Therefore, it is not possible to draw conclusions about the direction of the effect and the findings may not generalize to adolescents in general. Based on the existing study, we expected that alcohol-specific self-control is specifically related to adolescent alcohol use and not to other behaviors such as adolescent digital media use and smoking.
Current Study
In this 4-wave study among 906 adolescents aged 11–14 years, we aimed to examine whether the mediating role of alcohol-specific self-control in the relation between general self-control and adolescent alcohol use is domain- and substance-specific. Based on the self-control theory and previous empirical research, we hypothesized that (1) the effect of a higher level of general self-control on less adolescent alcohol use is mediated by a higher level of alcohol-specific self-control, and that (2) the mediating role of alcohol-specific self-control in the effect of general self-control on adolescent alcohol use is domain-specific and relates to adolescent alcohol use, but does not generalize to other behaviors that require self-control, specifically digital media use and smoking.