收益—风险并存情境中海洛因戒除者的行为冲动性

以64名男性生理脱瘾后处于不同康复阶段的海洛因戒除者和30名男性无毒品依赖行为的社会招募人员为被试,采用Iowa赌博任务探讨了收益-风险并存情境中海洛因戒除者的冲动性行为模式。结果发现,相对于正常人群,海洛因戒除者表现出"即时收益优先"的决策模式和对高风险的耐受性,且该特征不随戒除期的延长而改善。该研究为解释海洛因戒除者不顾其潜在的严重不利后果仍维持其复吸行为的现象提供了实验证据。     

海洛因戒除者的行为冲动性： 基于DDT和IGT任务反应模式的探讨

以61名男性海洛因戒除者和32名正常成年男性为被试,探讨了海洛因戒除者在延迟折扣任务和Iowa赌博任务两种决策条件下的冲动性反应模式及其关系。结果发现,海洛因戒除者的决策行为受其对即时强化的超敏感性或“即时收益优先”模式控制,其高冲动性特质既表现为对强化物长远价值的非敏感性,又表现为对强化物潜在风险的耐受性;该类人群上述两方面的特征虽有一定关联,但二者分别反应了其行为冲动性的两个相对独立的维度,且具有跨戒除时相的相对稳定性     

网络成瘾者的行为冲动性——来自爱荷华赌博任务的证据

以84名大学生为被试(网络成瘾和对照组被试各42名),采用感觉寻求量表和爱荷华赌博任务(Iowa Gambling Task)范式比较两组被试在感觉寻求水平和决策行为反应模式方面的差异.结果发现,与对照组被试相比,网络成瘾者的感觉寻求总分和去抑制、厌恶单调及寻求激动和惊险三个分量表得分显著增加,在IGT任务中优先选择收益和惩罚频率高的不利扑克牌,其冒险的决策策略并没有随着决策次数的增加而改变.这表明网络成瘾者的决策功能受损并表现出“即时收益优先”的决策模式和对强化物潜在风险的高耐受性.     

自我损耗促进冲动决策：来自行为和ERPs的证据

该研究以自我控制资源模型为理论框架, 采用行为实验和ERPs技术考察自我损耗对冲动决策的影响。实验1采用Stroop任务操纵自我控制资源并采用延迟折扣任务考察被试的决策冲动性, 实验2采用同样的实验任务并同时采用ERPs技术记录高、低自我损耗者在随后决策任务中的脑电成分。行为结果发现, 在控制心境、特质自我控制水平以及风险偏好等无关变量后, 高损耗者比低损耗者在延迟折扣任务上的折扣程度更大。ERPs结果发现, 不论延迟金额大小, 高损耗者在左侧额区诱发的N1波幅显著小于低损耗者; 高损耗者在右半球诱发的P2波幅显著大于低损耗者。研究表明, 自我损耗抑制决策早期左侧额区的激活水平, 个体因而无法识别冲突以及抵制即时满足的诱惑, 这促使他们采用直觉启发式进行决策, 最终导致冲动决策的产生。     

权力、任务框架对自我和为他人决策时风险偏好的影响

采用情境回忆任务启动被试的权力,并引入收益和损失两种任务框架,综合考察权力高低、任务框架对自我决策和为他人决策时风险偏好的影响。结果表明:(1)在为他人决策中,启动高权力被试有更强的风险偏好,而自我决策中,高、低权力启动组被试风险偏好上无显著差异;(2)在为他人决策中,被试在收益框架和损失框架下的风险偏好差异不显著,而在自我决策中,损失框架下的风险偏好显著高于收益框架;(3)低权力启动的被试,在损失框架下,为他人决策的风险偏好要小于自我决策,而在收益框架下差异不显著;高权力启动的被试无论在收益框架还是损失框架,自我-他人风险决策都不存在显著差异。     

金钱激励在社会排斥影响不确定性决策中的调节作用

研究从金钱补偿的视角考察社会排斥对不确定性决策的影响以及金钱激励的调节作用。实验发现,有金钱激励时,被排斥者在爱荷华赌博任务(Iowa gambling task,IGT)中的行为分数(组块2和3的选牌净分数和总的盈利分数)显著高于社会接纳者,表现为风险规避; 在无金钱激励时,被排斥者在IGT任务中的行为分数(组块4和5的选牌净分数和总的盈利分数)显著低于被接纳者,表现为风险寻求。实验结果表明社会排斥对不确定性决策的影响受到金钱激励的调制。     

物质主义价值观与时间压力对个体风险决策的影响

本研究考察物质主义价值观和时间压力对个体风险决策的影响。根据被试在物质主义问卷上的得分,以27%为标准筛选出高低物质主义倾向被试,采用有无时间压力情境下的爱荷华赌博任务和仿真气球冒险任务对高低物质主义价值观被试的风险决策行为进行研究。实验结果显示,在两种决策任务中,物质主义倾向和时间压力间均存在显著的交互作用,有时间压力的情境下高物质主义倾向个体比低物质主义倾向个体表现出更多的风险寻求,无时间压力情境下,高低物质主义倾向个体在风险决策上无显著差异。时间压力增加了高物质主义倾向个体的风险寻求。时间压力对风险决策的影响与决策任务有关,在仿真气球冒险任务中,时间压力使决策者表现出现风险规避;在爱荷华赌博任务中,时间压力使决策者表现出风险寻求。     

物质主义价值观与时间压力对个体风险决策的影响

本研究考察物质主义价值观和时间压力对个体风险决策的影响。根据被试在物质主义问卷上的得分,以27%为标准筛选出高低物质主义倾向被试,采用有无时间压力情境下的爱荷华赌博任务和仿真气球冒险任务对高低物质主义价值观被试的风险决策行为进行研究。实验结果显示,在两种决策任务中,物质主义倾向和时间压力间均存在显著的交互作用,有时间压力的情境下高物质主义倾向个体比低物质主义倾向个体表现出更多的风险寻求,无时间压力情境下,高低物质主义倾向个体在风险决策上无显著差异。时间压力增加了高物质主义倾向个体的风险寻求。时间压力对风险决策的影响与决策任务有关,在仿真气球冒险任务中,时间压力使决策者表现出现风险规避;在爱荷华赌博任务中,时间压力使决策者表现出风险寻求。     

个性心理因素与非理性金融行为研究

采用问卷法对个性心理因素中的人格、决策模式与非理性金融行为的关系进行了研究。研究结果表明：人格、决策模式对非理性金融行为有显著影响,不同人格类型、不同决策模式的个体的非理性金融行为差异显著。研究发现,人格、决策模式对各类非理性金融行为以及各类非理性金融行为总和的预测力皆达显著,并且对不同的非理性金融行为有不同预测力;理智型、即时型、依赖型的决策模式与感觉-直觉人格维度对非理性金融行为总和的预测力显著。     

道德情绪判断、错误信念与行为问题的关系——损人情境中幼儿反应的一项研究

运用投射性情境故事和Rutter量表(教师问卷)研究了204名幼儿对损人情境的道德情绪判断、错误信念水平、行为问题及其关系。结果表明:(1)男性幼儿的违纪行为显著高于女性,神经症行为得分在不同年龄之间差异达到显著性水平。(2)随年龄增长,对成功损人者之情绪判断为积极的人数会减少、而判断为消极的人数会增加,对失败损人者之情绪判断为消极的居多、而对成功损人者情绪判断为积极的为主。(3)幼儿已经基本能完成道德情境中的错误信念任务,当接受别人的"错误"表扬时会产生积极情绪。(4)未完成错误信念任务儿童的神经症得分显著高于完成者,对成功损人者之情绪判断为积极的儿童的神经症得分显著高于判断为消极者。     

A validation of a computerised task of risk-taking and moral decision-making and its association with sensation-seeking,impulsivity and sociomoral reasoning

The aim of this study was to investigate the reliability and validity of the computer based application of the Secret Agent (SA) task of risk-taking and moral decision-making. The participants were 100 male patients in a maximum security hospital (50 with severe mental illness and 50 with personality disorder) and 50 community based healthy controls. All participants completed the SA task, the Iowa Gambling Task (IGT), and measures of IQ, antisocial personality traits, sensation-seeking, impulsivity and sociomoral reasoning. The SA risk-taking and moral decision-making scales had satisfactory levels of reliability (Cronbach’s alpha). Risk-taking correlated significantly with sensation-seeking across all three participant groups. In contrast, risk-taking only correlated with impulsivity among the severe mental illness group. Moral decision-making correlated with sociomoral reasoning among the personality disorder group. No correlation was found between the SA scores and the IGT score and the IGT did not correlate with sensation-seeking or impulsivity. IQ and antisocial personality traits did not correlate with the SA or IGT scales. The study highlights the importance of context, the nature of the risk-taking task, and ‘problem framing’ of the instructions in their relationship with individual differences.     

Impulsivity partially mediates the relationship between BIS/BAS and risky health behaviors

Several theorists have suggested that impulsivity can be understood as a joint function of the behavioral approach (BAS) and behavioral inhibition systems (BIS). After resolving questions concerning the measurement of impulsivity and BAS, this study examined the relationships among risky health behaviors, impulsivity, BIS, and BAS. Utilizing a sample of undergraduates (N = 904), a structural model was tested in which BAS and BIS predicted impulsivity, which, in turn, predicted risky behavior. Fit indices were acceptable, but not good. A modified version of the model showed a statistically significant negative relationship between BAS and risky behaviors. However, the fit indices were not unequivocally supportive of the need to include that path. Overall, the data suggest that impulsivity is the joint result of countervailing motivational forces and that it partially or fully mediates the influence of BIS and BAS on risky health behavior.     

Secondary psychopathy,but not primary psychopathy,is associated with risky decision-making in noninstitutionalized young adults

Although risky decision-making has been posited to contribute to the maladaptive behavior of individuals with psychopathic tendencies, the performance of psychopathic groups on a common task of risky decision-making, the Iowa Gambling Task (IGT; Bechara, Damasio, Damasio, & Anderson, 1994), has been equivocal. Different aspects of psychopathy (personality traits, antisocial deviance) and/or moderating variables may help to explain these inconsistent findings. In a sample of college students (N = 129, age 18–27), we examined the relationship between primary and secondary psychopathic features and IGT performance. A measure of impulsivity was included to investigate its potential as a moderator. In a joint model including main effects and interactions between primary psychopathy, secondary psychopathy and impulsivity, only secondary psychopathy was significantly related to risky IGT performance, and this effect was not moderated by the other variables. This finding supports the growing literature suggesting that secondary psychopathy is a better predictor of decision-making problems than the primary psychopathic personality traits of lack of empathy and remorselessness.     

Impulsivity and Behavior-Dependent Life Events Mediate the Relationship of Reward Sensitivity and Depression,but Not Hypomania,Among at-Risk Adolescents

Both reward sensitivity and impulsivity are related to the development and course of bipolar spectrum disorders (BSDs) and have been implicated in other disorders and negative functional outcomes such as substance abuse, obesity, suicidal behaviors, and risk-taking. Furthermore, according to the transactional component of the Behavioral Approach System (BAS)/reward hypersensitivity theory of BSDs, people with reward hypersensitivity should experience more BAS-relevant events, and thus, are more vulnerable to mood symptoms and episodes via stress generation. Impulsivity may exacerbate stress generation in individuals at risk for BSDs based on exhibiting reward hypersensitivity. The current study examined whether impulsivity explained the generation of stress and subsequent mood symptoms beyond what is explained by reward sensitivity alone. Participants were 131 Moderate BAS and 216 High BAS sensitivity adolescents (M = 18.43 years, SD = 1.40), who completed baseline measures of reward sensitivity and impulsivity, as well as follow-up measures of life events and mood symptoms. Results from linear regression analyses indicated that higher baseline impulsivity predicted behavior-dependent, but not behavior-independent, life events. Furthermore, path analyses suggested that the effect of BAS group on depression symptoms at next follow-up was partly explained via the indirect effect of impulsivity and negative behavior-dependent life events. We did not find these effects for behavior-independent or positive-dependent events or for prediction of hypomanic symptoms. The findings suggest that impulsivity may account for stress generation of negative events that precede depression.     

Instructional cues modify performance on the Iowa Gambling Task

The current study investigated whether acute alcohol intoxication produces impaired decision-making on tasks assessing ventromedial prefrontal (VMF) cortex functioning and impulsive responding. Participants completed the Iowa Gambling Task (IGT), a decision-making test targeting the VMF, and the Newman Perseveration Task (NT), a measure of impulsivity. Personality measures of impulsivity were assessed using the Barratt Impulsiveness Scale (BIS). To encourage natural responding on both tasks, participants were falsely informed that the study was examining the effects of alcohol on memory; the impulsivity tasks were presented as 'distractor' tasks. Advantageous performance on the IGT was related to specific instructional cues as well as to knowledge about the experimental purpose. Performance of intoxicated and sober participants did not differ. A subsequent study in which the true purpose of the experiment was revealed confirmed that alcohol does not affect IGT performance. Most importantly, the instruction-sensitivity of the IGT emphasizes the importance of salient cues for decision-making.     

Reinforcement sensitivity theory and symptoms of personality disorder: Specificity of the BIS in Cluster C and BAS in Cluster B

Gray’s reinforcement sensitivity theory, consisting of the behavioral inhibition (BIS) and behavioral activation (BAS), is frequently used to represent basic dimensions of psychopathology. However, notably few investigations have examined the link between the BIS/BAS and symptoms of personality disorder (PD). Although the Fight-Flight-Freeze System has emerged in the revised model as an important aspect of motivation, the BIS (linked to anxiety) and BAS (linked to impulsivity) have been the primary foci. The current investigation uses a dimensional measure of PD, the schedule for nonadaptive and adaptive personality (SNAP; Clark, 1993) applied to two independent samples of English-speaking participants: undergraduates (n = 276) and clinical patients (n = 47). Results were consistent across both samples, demonstrating that symptoms of Cluster B PDs are indicative of high BAS levels whereas symptoms of Cluster C PDs are characterized by high BIS levels.     

Behavioral Approach System (BAS) Sensitivity and Bipolar Spectrum Disorders: A Retrospective and Concurrent Behavioral High-Risk Design

In this article, we tested the vulnerability hypothesis of the behavioral approach system (BAS) hypersensitivity model of bipolar disorders. We examined whether self-reported BAS sensitivity predicts lifetime bipolar spectrum diagnoses as well as symptoms and personality characteristics associated with bipolar disorder using a retrospective and concurrent behavioral high-risk design. Participants with high (HBAS; n=28) or moderate (MBAS; n=24) BAS sensitivity were selected and given a lifetime psychiatric diagnostic interview and self-report measures of proneness to bipolar symptoms, current symptoms, and personality characteristics relevant to bipolarity. HBAS participants were significantly and substantially more likely to have a lifetime bipolar spectrum disorder diagnosis than were MBAS participants, but did not differ from MBAS participants in their likelihood of a unipolar depression diagnosis. Also, the HBAS group exhibited higher impulsivity and proneness to hypomanic symptoms than the MBAS group, and BAS-reward responsiveness predicted hypomanic personality characteristics. Finally, high behavioral inhibition system (BIS) sensitivity was associated with proneness to and current depressive symptoms.

自恋与行为抑制/激活系统的关系：元分析

运用元分析方法探讨自恋与行为抑制/激活系统的关系。经过文献检索和筛选, 纳入原始文献19篇, 包含25个独立样本, 共7702名被试。根据同质性检验结果, 选用随机效应模型。结果发现, 自恋与行为抑制系统存在中度负相关(r = -0.27, 95% CI为[-0.34, -0.21]), 自恋测量工具在两者间起显著的调节作用; 自恋与行为激活系统存在高度正相关(r = 0.46, 95% CI为[0.40, 0.52]), 被试类型在两者间起显著的调节作用。自恋与行为抑制/激活系统的密切关系支持了自恋的主体性理论和人格强化敏感性理论。