成瘾人群的决策障碍：研究范式与神经机制

药物成瘾者和赌博成瘾者常常偏好即刻的奖赏而忽视将来的消极结果。在进行决策任务时, 他们倾向于做出不利的选择, 偏好短时的获益而不顾长期的损失, 这是一种决策障碍的表现。延迟折扣任务(DDT)、爱荷华赌博任务(IGT)和剑桥赌博任务(CGT)是研究决策障碍的三种常用方法和范式, 分别考察成瘾人群的冲动性决策、决策短视和决策时的冒险行为。近十几年来的研究表明, 前额叶皮层(PFC)在人类的决策活动中起重要作用。其中, 腹内侧前额叶(VMPFC)、眶额叶(OFC)、背外侧前额叶(DLPFC)等皮层的功能变化与成瘾人群的决策障碍有密切关系。     

自恋与决策的研究现状及展望

目前, 自恋与决策的研究主要依托实验室任务进行, 涉及赌博、投资和管理等领域的决策行为。大部分研究结果表明, 自恋者在上述实验任务中都表现出明显的决策偏差与风险决策, 但也有研究证实了某些情境下其决策的有效性。自恋与决策的理论模型主要包括人格特质模型、自我调节模型、归因模型与趋近回避模型等, 未来研究应注意方法的改进、自恋的积极功能、情绪的作用以及文化的影响。     

自我主观标准决定执行任务和观察任务中的结果评价

为了解结果的自我相关性对执行任务和观察任务中内侧额叶负波的影响, 研究使用事件相关电位技术观测男女被试在两种任务中, 知觉自己结果和他人结果时的神经活动。结果发现执行任务中内侧额叶负波波幅大于观察任务; 在执行任务中, 男性的内侧额叶负波相对于他人结果, 观察自己结果时的波幅更大; 在观察任务中, 女性的内侧额叶负波相对于自己结果, 观察他人结果时的波幅更大, 这些结果说明内侧额叶负波反映了个体按照主观标准对结果的情绪动机意义进行监测, 男女对社会信息的奖赏评价具有不同的方向性。     

Religion and Gambling Among Young Adults in the United States: Moral Communities and the Deterrence Hypothesis

Despite voluminous research examining religion as an integrative force and a mechanism of social control, relatively few studies have examined the association between religion and proscribed or morally ambiguous behaviors beyond crime and drug use. The present exploratory study examines the role of religion, at both the individual and county levels, in predicting self‐reported gambling problems. Hierarchical linear models are employed to examine religion and self‐reported gambling problems using the restricted use data of the National Longitudinal Study of Adolescent Health. A negative association between religious attendance and problem gambling (at the individual level) is strongest when church adherents per capita is relatively high (measured at the county level). However, when the number of conservative Protestants per capita is relatively high, religious attendance (measured at the individual level) is associated with an increased risk of gambling problems. These countervailing findings are interpreted as supportive of the bonding and bridging capital thesis.     

Inverse association between dopaminergic neurotransmission and Iowa Gambling Task performance in pathological gamblers and healthy controls

Linnet, J., Møller, A., Peterson, E., Gjedde, A. & Doudet, D. (2011). Inverse association between dopaminergic neurotransmission and Iowa Gambling Task performance in pathological gamblers and healthy controls. Scandinavian Journal of Psychology 52, 28–34. The dopamine system is believed to affect gambling behavior in pathological gambling. Particularly, dopamine release in the ventral striatum appears to affect decision‐making in the disorder. This study investigated dopamine release in the ventral striatum in relation to gambling performance on the Iowa Gambling Task (IGT) in 16 Pathological Gamblers (PG) and 14 Healthy Controls (HC). We used Positron Emission Tomography (PET) to measure the binding potential of [¹¹C] raclopride to dopamine D2/3 receptors during a baseline and gambling condition. We hypothesized that decreased raclopride binding potentials in the ventral striatum during gambling (indicating dopamine release) would be associated with higher IGT performance in Healthy Controls, but lower IGT performance in Pathological Gamblers. The results showed that Pathological Gamblers with dopamine release in the ventral striatum had significantly lower IGT performance than Healthy Controls. Furthermore, dopamine release was associated with significantly higher IGT performance in Healthy Controls and significantly lower IGT performance in Pathological Gamblers. The results suggest that dopamine release is involved both in adaptive and maladaptive decision‐making. These findings may contribute to a better understanding of dopaminergic dysfunctions in pathological gambling and substance related addictions.     

Measuring decision‐making competence in Chinese adults

In this study, we translated and localized the Adult Decision‐making Competence scale (A‐DMC) and tested its reliability and validity with large samples. Results show the Chinese A‐DMC has relatively good reliability (Cronbach's alpha above 0.6 and test–retest reliability coefficients ranging from 0.44 to 0.78 on all subscales), comparable with the original version. Regarding validity, results of exploratory factor analysis and confirmatory factor analysis support the one‐factor model, indicating the A‐DMC has good internal consistency and construct validity. A‐DMC scores correlated positively with cognitive ability, constructive decision‐making styles, and good decision outcomes. Additionally, individuals with higher A‐DMC scores were found to perform better on the Cambridge gambling task and Iowa gambling task. These results confirm the validity of the Chinese version of the A‐DMC, which is suitable for measuring decision‐making competence in Chinese adults.     

Disposable Time and Disposable Income: Problem Casino Gambling Behavior in Older Adults

Increasing numbers of retirees spend their leisure time in the ever-growing number of gambling casinos in this country. For most older adults, casino gambling is a new form of excitement and entertainment. However, for some retirees, especially those vulnerable to depression from the changes and losses that can occur in aging, casino gambling can become disordered, problematic, and/or an addiction. Although prevalence studies have examined the incidence of problem gambling in other age groups, little attention has been directed to the impact of casino gambling on older adults. The authors discuss problem and pathological gambling in retired older adults, and provide clinical case examples of a growing number of older adults with problem gambling behaviors seen in an outpatient geriatric psychiatry clinic. Finally, they urge that an evaluation of gambling behaviors be a routine portion of geriatric clinical evaluations.     

Beating lady luck: Effects of competitive gambling on opponent likeability and targeted physical aggression

This study aimed to examine the effects of gambling motives and competitive gambling outcomes on opponent likeability and targeted physical aggression. We hypothesized that (a) losers would perceive their opponents to be less likeable and (b) would be physically more aggressive toward their opponents. Opponent likeability was proposed to mediate the lose–aggression relationship while social gambling motives were proposed to moderate the lose–aggression relationship. Specifically, we expected that losers of competitive gambling situations would engage in greater physical aggression only if they perceived their opponents to be less likeable. In addition, lower perceived opponent likeability would translate into greater targeted physical aggression only if the loser possessed low social motives for gambling. Ninety‐eight undergraduates who self‐identified mostly as recreational gamblers participated in a competitive gambling game. The Hot Sauce Paradigm was adapted as a measure of targeted physical aggression. Results obtained supported our hypotheses. Potential implications and limitations are discussed.