The model of addiction proposed by Redish et al. shows a lack of fit with recent data and models in psychological studies of addiction. In these dual process models, relatively automatic appetitive processes are distinguished from explicit goal-directed expectancies and motives, whereas these are all grouped together in the planning system in the Redish et al. model. Implications are discussed.

The understanding of decision-making systems has come together in recent years to form a unified theory of decision-making in the mammalian brain as arising from multiple, interacting systems (a planning system, a habit system, and a situation-recognition system). This unified decision-making system has multiple potential access points through which it can be driven to make maladaptive choices, particularly choices that entail seeking of certain drugs or behaviors. We identify 10 key vulnerabilities in the system: (1) moving away from homeostasis, (2) (...) changing allostatic set points, (3) euphorigenic signals, (4) overvaluation in the planning system, (5) incorrect search of situation-action-outcome relationships, (6) misclassification of situations, (7) overvaluation in the habit system, (8) a mismatch in the balance of the two decision systems, (9) over-fast discounting processes, and (10) changed learning rates. These vulnerabilities provide a taxonomy of potential problems with decision-making systems. Although each vulnerability can drive an agent to return to the addictive choice, each vulnerability also implies a characteristic symptomology. Different drugs, different behaviors, and different individuals are likely to access different vulnerabilities. This has implications for an individual's susceptibility to addiction and the transition to addiction, for the potential for relapse, and for the potential for treatment. (shrink)

We investigated the influence of personality and culture on effects of mortality salience over cultural worldview defense. We hypothesized that CWVD reactions to MS differ between Germany and Poland because of the higher conservatism of the latter country, and that they are moderated by action vs. state orientation. In this study German and Polish, participants were exposed either to MS or to a control condition. Punishment ratings to trivial offences and serious social transgressions were measures of CWVD. Results showed that (...) social transgressions in both conditions were more strongly punished in Poland than in Germany. Additionally, compared to the control condition, under MS action oriented punished serious transgressions more strongly in Germany whereas state oriented punished serious transgressions more strongly in Poland. That is, the effects of MS on CWVD are moderated by personality and culture. We interpret the opposite pattern of punishment to serious social transgressions given by action and state orientedin in Germany and Poland, respectively, according to the higher emotional autonomy of action-oriented persons in either culture. (shrink)

The model proposed by Redish et al. considers vulnerabilities within decision systems based on expectancy-value assumptions. Further understanding of processes leading to addiction can be gained by considering other inputs to decision-making, particularly affective associations with behaviors. This consideration suggests additional decision-making vulnerabilities that might explain addictive behaviors.