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121.
Abstract. In order to survive as a species and grow in complexity, humanity must adopt a new image of what it means to be human, rediscover a reward system beyond the merely material, and see that young people find joy in challenges and in cooperating with others.  相似文献   
122.
Psychophysics of Remembering: The Discrimination Hypothesis   总被引:2,自引:0,他引:2  
In a psychophysical approach to remembering, the events to be remembered are discriminated from other possibilities at the time of remembering, and not at the time of encoding or learning. The discrimination is specific to the retention interval at which remembering occurs, as shown by experiments demonstrating that discriminability and response bias are delay–specific. This article discusses a discrimination model for remembering that emphasizes the individual's history of learning about reward payoffs in similar experiences in the past. This model predicts the two characteristics of forgetting functions, initial discriminability and rate of forgetting.  相似文献   
123.
大量研究发现心理渴求机制的紊乱是尼古丁成瘾的核心机制之一。线索暴露是探索心理渴求与尼古丁成瘾关系的重要研究范式。但最近研究者提出该范式较难区分事件性渴求与背景性渴求,导致无法清楚定位渴求在尼古丁成瘾中扮演的角色。通过对以往文献的回顾,对不同成瘾概念、作用机制和生理基础进行对比分析,认为事件性渴求与背景性渴求两者在维持成瘾行为上的确存在不同的作用路径。未来研究应改进实验范式,分别探讨两种心理渴求与尼古丁成瘾的内在联系,完善心理渴求与尼古丁成瘾的关系模型,为尼古丁成瘾的治疗和干预等方法提供一定的理论依据。  相似文献   
124.
125.
    
Two studies explore whether general beliefs about the social world or social axioms may be antecedents of dispositional hope. Social axioms are generalized cognitive representations that provide frames for constructing individuals’ hope‐related cognitions. Considering social axioms’ instrumental and ego‐defensive functions, two social axioms, social cynicism and reward for application are hypothesized to be negative and positive predictors of hope, respectively. Study 1 used multiple regression analysis to test the hypothesis. Study 2 used structural equation modeling to test the model with a pathway linking reward for application with hope, and another pathway linking social cynicism and hope that is mediated by self‐esteem. The results are discussed in terms of extending the range of psychological constructs and processes that foster the development of hope.  相似文献   
126.
    
Although it is commonly assumed that perceptions of equity at work have a significant impact on employee absenteeism, our understanding of the equity–absence relationship is limited in that (1) little is known about equity concepts other than procedural and distributive justice; and (2) for the most part, research has overlooked variables likely to mediate and moderate the impact of equity on absenteeism. Drawing from the effort–reward imbalance model (ERI; Siegrist, 1996), our study advances past research by investigating the association between status inconsistency (a situation in which there is a mismatch between, for example, a person's education and his/her income) and absenteeism, and the variables likely to account for this association. Results from a sample of 416 customer-care employees show that stress mediates the relationship between status inconsistency and absenteeism, and that HRM practices attenuate this relationship. Moderated mediation analyses further reveal that HRM practices moderate the indirect effect of status inconsistency on absenteeism via stress.  相似文献   
127.
    
Rewards that are not immediately available are discounted compared to rewards that are immediately available. The more a person discounts a delayed reward, the more likely that person is to have a range of behavioral problems, including clinical disorders. This latter observation has motivated the search for interventions that reduce discounting. One surprisingly simple method to reduce discounting is an \"explicit-zero\" reframing that states default or null outcomes. Reframing a classical discounting choice as \"something now but nothing later\" versus \"nothing now but more later\" decreases discount rates. However, it is not clear how this \"explicit-zero\" framing intervention works. The present studies delineate and test two possible mechanisms to explain the phenomenon. One mechanism proposes that the explicit-zero framing creates the impression of an improving sequence, thereby enhancing the present value of the delayed reward. A second possible mechanism posits an increase in attention allocation to temporally distant reward representations. In four experiments, we distinguish between these two hypothesized mechanisms and conclude that the temporal attention hypothesis is superior for explaining our results. We propose a model of temporal attention whereby framing affects intertemporal preferences by modifying present bias.  相似文献   
128.
    
Methcathinone‐induced Parkinsonism is a recently described extrapyramidal syndrome characterized by globus pallidus and substantia nigra lesions, which provides a unique model of basal ganglia dysfunction. We assessed motivated behaviour in this condition using a novel cost‐benefit decision‐making task, in which participants decided whether it was worth investing effort for reward. Patients showed a dissociation between reward and effort sensitivity, such that pallidonigral complex dysfunction caused them to become less sensitive to rewards, while normal sensitivity to effort costs was maintained.  相似文献   
129.
    
Adolescents with attention-deficit/hyperactivity disorder (ADHD) are known to have stronger preferences for smaller immediate rewards over larger delayed rewards in delay discounting tasks than their peers, which has been argued to reflect delay aversion. Here, participants performed a delay discounting task with gains and losses. In this latter condition, participants were asked whether they were willing to wait in order to lose less money. Following the core assumption of the delay aversion model that individuals with ADHD have a general aversion to delay, one would predict adolescents with ADHD to avoid waiting in both conditions. Adolescents (12–17 years) with ADHD (n = 29) and controls (n = 28) made choices between smaller immediate and larger delayed gains, and between larger immediate and smaller delayed losses. All delays (5–25 s) and gains/losses (2–10 cents) were experienced. In addition to an area under the curve approach, a mixed-model analysis was conducted to disentangle the contributions of delay duration and immediate gain/delayed loss amount to choice. The ADHD group chose the immediate option more often than controls in the gain condition, but not in the loss condition. The contribution of delay duration to immediate choices was stronger for the ADHD group than the control group in the gain condition only. In addition, the ADHD group scored higher on self-reported delay aversion, and delay aversion was associated with delay sensitivity in the gain condition, but not in the loss condition. In sum, we found no clear evidence for a general aversion to delay in adolescents with ADHD.  相似文献   
130.
    
Reward can benefit visual processing of reward-associated objects in a non-strategic way. Recent studies have suggested that such influence extends also to visual working memory (VWM) representations of reward-associated stimuli. However, it is not clear yet which mechanisms underlie the behavioural effects in VWM tasks: reward could directly impact on our ability to maintain representations in VWM or it could influence memory indirectly via priming of attentional selection. To distinguish between these alternatives we measured event-related potential indices of selective attention – the N2pc – and VWM maintenance – the CDA (contralateral delay activity) – while participants completed a VWM task. Results show that reward outcome in one trial caused similarly coloured targets to be strongly represented in VWM in subsequent trials, as expressed in a larger-amplitude CDA This was not preceded by a corresponding effect on attentional selection, in so far as our key manipulation had no impact on the N2pc. In a second experiment, we found that reward priming produced a behavioural benefit that emerged over time, suggesting that the representations of reward-associated items stored in VWM are more resistant to interference and decay. We conclude that when the task stresses VWM maintenance, it is at this representational level that reward will have impact.  相似文献   
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