ReviewImpulsivity and adolescent substance use: Rashly dismissed as “all-bad”?
Section snippets
A model of how impulsivity conveys risk for addiction
Dawe and Loxton (2004), in their review of the literature, concluded that impulsivity was better conceptualized as a two-dimensional trait. The first trait, labeled Reward Drive (RD), is argued to reflect individual differences in sensitivity to incentive motivation and engagement in appetitive behavior upon detection of reward cues (e.g., walking past a bar). The conceptualization of this trait was based on the Behavioral Approach/Activation System (BAS) proposed in Gray's Reinforcement
Impulsivity and adolescent substance misuse
It is well established that trait impulsivity conveys risk for the development of substance use problems in adolescents. However, it is important to note that the vast majority of studies examining this relationship measured impulsivity with scales that have since been shown to load on an RI-like factor. As a result, we will refer to the “impulsivity” examined in such studies as RI.
In addition to family (e.g., parental substance use, family dysfunction) and social factors (e.g., peer group,
Impulsivity and neurocognitive changes in adolescence
Across species, adolescence is a phase of life characterized by marked changes in the neuronal architecture and functioning of the brain (Spear, 2000). These changes are believed to play a significant role in the behavioral manifestations commonly thought to typify “the teenage years”; namely, sensation-seeking, poor judgment, and risk-taking (Steinberg, 2005). Indeed, it is difficult to underestimate the magnitude of transition taking place in the adolescent brain. Neurophysiological changes
Impulsivity: is it really all bad?
There is clear evidence that both impulsivity components play a role in addictive behavior. However, RD and RI are also related to certain adaptive behaviors that addiction scientists tend not to focus on. In this section, we review some of this research and follow it with a discussion of the importance of this trait to healthy behavior as well as how intervention approaches may be able to capitalize on high levels of RD and RI.
Reward Drive is a component of impulsivity that is measured, to
Implications for intervention
Traditionally, therapeutic interventions for substance use problems have focused on techniques aimed at enhancing restraint and avoidance of situations in which a person is likely to be tempted to use an abused substance. However, more recent approaches have begun to focus on “redirecting” approach behavior to healthier goals. Examples of this approach include contingency management (CM), which involves rewarding (e.g., with vouchers, cash, methadone) behaviors that are consistent with
Summary and way forward
The aim of the present article was to review recent theoretical and empirical developments in the neuropsychology of impulsivity and substance misuse. This began with a discussion of the current conceptualization of trait impulsivity as a multidimensional construct and how different components of this trait are believed to influence behaviors involved in the addictive process. This conceptualization is an attempt to synthesize data obtained from a large body of research that has focused on
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