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Beyond Self-Interested Choices: The Influence Mechanism of Social Norms on Pro-Environmental Behavior in Social Dilemmas
Ren Mengmeng, Fan Wei, Huang Zijun, Yang Lijun, Zhong Yiping
Journal of Psychological Science ›› 2026, Vol. 49 ›› Issue (2) : 412-425.
PDF(2646 KB)
PDF(2646 KB)
Beyond Self-Interested Choices: The Influence Mechanism of Social Norms on Pro-Environmental Behavior in Social Dilemmas
In complex social contexts, pro-environmental behavior (PEB) often emerges within social dilemmas where long-term environmental interests conflict not only with short-term personal gains but also with the cooperative interests of social groups. These dilemmas highlight a fundamental challenge: individuals may prioritize immediate personal or collective benefits over ecological sustainability. Social norms, as powerful yet often implicit regulatory forces, have been shown to promote PEB significantly. However, it is unclear whether social norms exert the same influence within social dilemmas, where environmental interests directly compete with both self-interest and group cooperation. Investigating this issue is crucial for advancing theoretical understanding and developing practical strategies that foster sustainable behavior.
According to normative focus theory, social norms are classified into descriptive social norms, which communicate “what others are doing,” and injunctive social norms, which indicate “societal approval or disapproval.” Previous research suggests that these two types of norms exert distinct effects on PEB, with descriptive social norms frequently demonstrating greater effectiveness than injunctive social norms in encouraging such actions. However, how these norms operate within social dilemmas, where PEB is influenced by competing individual, group, and collective environmental interests, remains unknown. To address this question, the present study employs the Greater Good Game, a paradigm specifically designed to examine PEB in social dilemmas. By integrating event-related potentials (ERP) techniques, this research further explores the neural mechanisms underlying the influence of different types and intensities of social norms on pro-environmental decision-making in social dilemmas. Through this approach, the study aims to deepen our understanding of how social norms shape PEB in complex social contexts.
The results of this study indicate that individuals exposed to prominent descriptive social norms exhibit an increase in PEB within social dilemmas. This implies that when individuals perceive a robust norm of PEB among their peers, they are more likely to conform and engage in similar actions. These findings highlight the significant role of descriptive social norms in promoting PEB through social influence, demonstrating how perceived group conduct influences individual environmental decisions. At the neural level, ERP analysis offers more profound insights into the distinct effects of injunctive social norms on cognitive processing. The results show that under injunctive social norm conditions, individuals making pro-environmental choices exhibit a more negative N1 amplitude and an enhanced P2 amplitude. The increased negativity of the N1 amplitude indicates that injunctive social norms attract greater attention during the early stages of perceptual processing. Meanwhile, the larger P2 amplitude signifies enhanced cognitive resource allocation during the initial phases of decision evaluation. Furthermore, individuals subjected to high injunctive social norms exhibit a more negative N400 amplitude when making pro-environmental choices, a component typically linked to semantic integration difficulties and cognitive conflict. This pattern implies that injunctive social norms may induce greater cognitive conflict, thereby prompting individuals to engage in more reflective processing as they consider the broader social implications of their actions.
The findings suggest that the high descriptive social norms promote PEB by reinforcing group behavioral consistency, encouraging individuals to align their actions with perceived collective norms. In contrast, injunctive social norms influence decision-making by enhancing attentional engagement and eliciting cognitive conflict, prompting more deliberate processing of environmental choices. These results offer valuable insights into the mechanisms by which social norms influence PEB within social dilemmas, particularly in shaping individuals’ ecological decision-making processes. By uncovering distinct cognitive and neural pathways associated with descriptive and injunctive social norms, this study deepens our understanding of how social influence operates in environmental contexts. Furthermore, these findings provide a theoretical foundation for designing policies that effectively leverage social norms to encourage sustainable behaviors, offering practical implications for environmental policy and intervention strategies aimed at addressing urgent ecological challenges.
pro-environmental behavior / social norms / greater good game / ERP
| [1] |
陈慧, 刘扬, 曾垂凯, 孙彦. (2015). 守范?失范?—作为参照点的社会规范对决策行为的影响. 心理科学, 38(1), 408-413.
|
| [2] |
范伟, 任梦梦, 张文洁, 钟毅平. (2022). 反馈对自我欺骗的影响:来自ERP的证据. 心理学报, 54(5), 481-496.
本研究主要探讨反馈类型和反馈效价对自我欺骗的影响。实验1采用前瞻范式探究不同效价的模糊反馈对自我欺骗的影响, 结果发现, 相比于无答案提示组, 有答案提示组的被试在积极模糊反馈的条件下显著地提高测试2第二阶段的预测分数(自我欺骗的程度加重)。实验2探究不同效价的精确反馈对自我欺骗的影响, 结果发现, 相对于无答案提示组, 有答案提示组的被试在消极精确反馈条件下显著地降低测试2第二阶段的预测分数。实验3采用ERP技术探究反馈类型和反馈效价影响自我欺骗的内在机制, 结果发现, 模糊反馈条件下的自我欺骗诱发较大的P2成分、诱发较小的N1和N400成分; 以及发现自我欺骗在额区的效应较大。总之, 这些研究结果表明可能积极反馈促进个体的自我欺骗产生, 消极反馈削弱个体自我欺骗的产生; 积极模糊反馈能够进一步促进了个体自我欺骗的产生。这些研究结果还表明自我欺骗产生的背后机制可能是自我膨胀。
|
| [3] |
黄宇霞, 罗跃嘉. (2009). 负性情绪刺激是否总是优先得到加工:ERP研究. 心理学报, 41(9), 822-831.
|
| [4] |
石荣, 刘昌, 唐慧琳, 郝俊懿, 沈汪兵. (2024). 自发的善行:加工模式和情境紧急性影响亲社会行为. 心理学报, 56(9), 1239-1251.
亲社会行为作为亲社会属性的重要方面, 一直是自然和社会科学研究的焦点。然而, 对于人们是否能够形成亲社会行为的一般直觉倾向, 仍存在争论。研究聚焦于慈善情境下的捐助行为, 采用事件相关电位技术考察加工模式和情境紧急性对捐助行为的影响及其神经机制。行为结果发现, 捐助行为受紧急性和捐助成本的双重影响, 随着成本的增加, 个体更愿意帮助紧急情境下的求助者。脑电结果发现, 直觉加工比反思加工诱发了更大的前部N1波幅, 而反思加工比直觉加工诱发了更大的P2波幅。在非紧急情境下, 反思加工比直觉加工诱发了更大的P3波幅。这一结果表明加工模式不仅影响了个体的早期注意和对刺激的评估, 还调节了晚期阶段对非紧急事件的认知投入。研究揭示了加工模式和事件紧急性对亲社会行为的影响, 通过关注紧急性这一潜在调节因素为不一致结果指出了方向, 扩展了对社会启发式假说的理解。
|
| [5] |
孙宇. (2021). 环境身份对环境决策加工的影响 (博士学位论文). 湖南师范大学,长沙.
|
| [6] |
徐杰, 孙向超, 董悦, 汪祚军, 李伟强, 袁博. (2017). 人情与公正的抉择:社会距离对第三方干预的影响. 心理科学, 40(5), 1175-1181.
|
| [7] |
占友龙, 肖啸, 谭千保, 李琎, 钟毅平. (2022). 声誉关注与社会距离对伤害困境中道德决策的影响:来自行为与ERPs的证据. 心理学报, 54(6), 613-627.
在社会交往中, 声誉关注是人类合作行为和道德判断的重要决定因素之一。以往研究只是单独考察声誉关注或社会距离会如何影响道德决策行为, 但两者如何交互影响道德决策尚不清楚, 尤其是禁止性道德范畴领域(如, 伤害他人行为)下道德决策的认知神经机制。本研究要求被试在匿名或公开情境下决策是否愿意对不同社会距离他人(朋友、熟人、陌生人)实施疼痛电击以增加自己的金钱收益, 同时记录其决策时的行为和神经反应。结果发现, 匿名情境下被试对朋友的电击伤害要显著低于对熟人和陌生人的, 表现出一种明显的“利己的利他主义”决策倾向; 与朋友和陌生人相比, 被试在涉及熟人的两难决策中花费了更长的时间, 体验到了更强烈的厌恶情绪, 并诱发了更大波幅的与情绪反应有关的P260成分, 以及与认知推理有关的晚期正成分(LPP: 300~450 ms), 表现出一种典型的“熟人效应”。然而, 行为与ERP指标上的这些差异在公开情境下均显著减弱了。这表明个体在禁止性道德范畴领域下的道德决策遵循着一种“利己的利他主义”的道德原则, 熟人关系的不确定性会在道德决策中诱发强烈的负性情绪和认知负荷, 而声誉关注削弱了利己倾向和人际关系的不确定性所带来的厌恶情绪和认知冲突。
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| [8] |
Engaging in personally costly within-group cooperation benefits one’s in-group members but also impacts other groups by benefiting, neglecting, or harming out-group members, leading to a range of potential consequences for between-group relations (e.g., collaboration vs. competition). We introduce the Intergroup Parochial and Universal Cooperation (IPUC) game to investigate the prevalence of the individual preferences underlying these different expressions of within-group cooperation: universalism, weak parochialism, and strong parochialism. In two online experiments with natural groups, we show that the IPUC has value beyond existing economic games in measuring these preferences separately. In a third experiment conducted in the lab, we show how dispositional measures traditionally associated with within- and between-group cooperation, that is, social value orientation, social dominance orientation, honesty-humility, and empathic concern, predict different preferences. Thus, the IPUC provides a tool to better understand within- and between-group interactions and to test interventions to overcome intergroup conflict.
|
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
|
| [15] |
Using event-related potentials (ERPs), this study investigated the neural substrates of the conflicts in counter-conformity choices in purchasing books online. For each trial, a participant decided whether to buy a book according to the title keyword, as well as the numbers of positive and negative reviews on the book. A participant's choice was termed conformity if she/he decided to buy the book under the condition of consistently positive reviews, or not to buy the book under the condition of consistently negative reviews, whereas the case was counter-conformity if a participant did the opposite. In the time window 300-600ms after the stimulus onset, a strong negative deflection of ERP (N500) was recorded when participants made counter-conformity choices. The topographic distribution of the N500 (N400-like) is not typical of the semantic N400. The N500 might be evoked by the cognitive and emotional conflicts faced by participants in counter-conformity choices. The present findings provide evidence that the N400 can be elicited by non-semantic conflicts.Copyright © 2010 Elsevier B.V. All rights reserved.
|
| [16] |
|
| [17] |
|
| [18] |
|
| [19] |
|
| [20] |
|
| [21] |
We have developed a toolbox and graphic user interface, EEGLAB, running under the crossplatform MATLAB environment (The Mathworks, Inc.) for processing collections of single-trial and/or averaged EEG data of any number of channels. Available functions include EEG data, channel and event information importing, data visualization (scrolling, scalp map and dipole model plotting, plus multi-trial ERP-image plots), preprocessing (including artifact rejection, filtering, epoch selection, and averaging), independent component analysis (ICA) and time/frequency decompositions including channel and component cross-coherence supported by bootstrap statistical methods based on data resampling. EEGLAB functions are organized into three layers. Top-layer functions allow users to interact with the data through the graphic interface without needing to use MATLAB syntax. Menu options allow users to tune the behavior of EEGLAB to available memory. Middle-layer functions allow users to customize data processing using command history and interactive 'pop' functions. Experienced MATLAB users can use EEGLAB data structures and stand-alone signal processing functions to write custom and/or batch analysis scripts. Extensive function help and tutorial information are included. A 'plug-in' facility allows easy incorporation of new EEG modules into the main menu. EEGLAB is freely available (http://www.sccn.ucsd.edu/eeglab/) under the GNU public license for noncommercial use and open source development, together with sample data, user tutorial and extensive documentation.
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| [22] |
In this exploratory field-study, we examined how normative messages (i.e., activating an injunctive norm, personal norm, or both) could encourage shoppers to use fewer free plastic bags for their shopping in addition to the supermarket’s standard environmental message aimed at reducing plastic bags. In a one-way subjects-design (N = 200) at a local supermarket, we showed that shoppers used significantly fewer free plastic bags in the injunctive, personal and combined normative message condition than in the condition where only an environmental message was present. The combined normative message did result in the smallest uptake of free plastic bags compared to the injunctive and personal normative-only message, although these differences were not significant. Our findings imply that re-wording the supermarket’s environmental message by including normative information could be a promising way to reduce the use of free plastic bags, which will ultimately benefit the environment.
|
| [23] |
In environmental literature it is argued that three different value orientations may be relevant for understanding environmental beliefs and intentions: egoistic, altruistic, and biospheric. Until now, the distinction between altruistic and biospheric value orientations has hardly been supported empirically. In this article, three studies are reported aimed to examine whether an egoistic, altruistic, and biospheric value orientation can indeed be distinguished empirically by using an adapted value instrument. Also, it is examined whether these value orientations are differently and uniquely related to general and specific beliefs and behavioral intention. Results provide support for the reliability and validity of the value instrument. All studies replicated the distinction into three value orientations, with sufficient internal consistency. Furthermore, when altruistic and biospheric goals conflict, they seem to provide a distinct basis for proenvironmental intentions. The value instrument could therefore be useful to better understand relationships between values, beliefs, and intentions related to environmentally significant behavior.
|
| [24] |
|
| [25] |
|
| [26] |
|
| [27] |
|
| [28] |
Two field experiments examined the effectiveness of signs requesting hotel guests' participation in an environmental conservation program. Appeals employing descriptive norms (e.g., “the majority of guests reuse their towels”) proved superior to a traditional appeal widely used by hotels that focused solely on environmental protection. Moreover, normative appeals were most effective when describing group behavior that occurred in the setting that most closely matched individuals' immediate situational circumstances (e.g., “the majority of guests in this room reuse their towels”), which we refer to as provincial norms. Theoretical and practical implications for managing proenvironmental efforts are discussed.
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| [29] |
|
| [30] |
|
| [31] |
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| [32] |
The authors suggest that injunctive and descriptive social norms engage different psychological response tendencies when made selectively salient. On the basis of suggestions derived from the focus theory of normative conduct and from consideration of the norms' functions in social life, the authors hypothesized that the 2 norms would be cognitively associated with different goals, would lead individuals to focus on different aspects of self, and would stimulate different levels of conflict over conformity decisions. Additionally, a unique role for effortful self-regulation was hypothesized for each type of norm-used as a means to resist conformity to descriptive norms but as a means to facilitate conformity for injunctive norms. Four experiments supported these hypotheses. Experiment 1 demonstrated differences in the norms' associations to the goals of making accurate/efficient decisions and gaining/maintaining social approval. Experiment 2 provided evidence that injunctive norms lead to a more interpersonally oriented form of self-awareness and to a greater feeling of conflict about conformity decisions than descriptive norms. In the final 2 experiments, conducted in the lab (Experiment 3) and in a naturalistic environment (Experiment 4), self-regulatory depletion decreased conformity to an injunctive norm (Experiments 3 and 4) and increased conformity to a descriptive norm (Experiment 4)-even though the norms advocated identical behaviors. By illustrating differentiated response tendencies for each type of social norm, this research provides new and converging support for the focus theory of normative conduct.(c) 2011 APA, all rights reserved
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| [33] |
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| [34] |
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| [35] |
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| [36] |
Imagine that the neighborhood you are living in is covered with graffiti, litter, and unreturned shopping carts. Would this reality cause you to litter more, trespass, or even steal? A thesis known as the broken windows theory suggests that signs of disorderly and petty criminal behavior trigger more disorderly and petty criminal behavior, thus causing the behavior to spread. This may cause neighborhoods to decay and the quality of life of its inhabitants to deteriorate. For a city government, this may be a vital policy issue. But does disorder really spread in neighborhoods? So far there has not been strong empirical support, and it is not clear what constitutes disorder and what may make it spread. We generated hypotheses about the spread of disorder and tested them in six field experiments. We found that, when people observe that others violated a certain social norm or legitimate rule, they are more likely to violate other norms or rules, which causes disorder to spread.
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| [37] |
Previous research consistently showed that Openness to Experience is positively linked to pro-environmental behavior. However, this does not appear to hold whenever pro-environmental behavior is mutually exclusive with cooperation. The present study aimed to replicate this null effect of Openness and to test political orientation as explanatory variable: Openness is associated with a left-wing/liberal political orientation, which, in turn, is associated with both cooperation and pro-environmental behavior, thus creating a decision conflict whenever the latter are mutually exclusive. In an online study (N = 355) participants played the Greater Good Game, a social dilemma involving choice conflict between pro-environmental behavior and cooperation. Results both replicated prior findings and suggested that political orientation could indeed account for the null effect of Openness.
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| [38] |
|
| [39] |
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| [40] |
This study explored cognitive elaboration as a moderator of the impact of injunctive and descriptive normative messages on behavioral intentions. Participants ( N = 246) received a message advocating a student health program that stressed either descriptive norms or injunctive norms under conditions of low elaboration or high elaboration and then responded to a series of behavioral intention questions. To determine whether the effects of type of normative message and elaboration varied across personality traits, participants’ level of self-monitoring and extraversion were measured 1–6 months prior to the experimental session. Analyses revealed a 2-way interaction between message type and elaboration, suggesting that descriptive messages were more successful under low-elaboration conditions, whereas injunctive messages were more successful under high-elaboration conditions. This 2-way interaction was not qualified by a 3-way interaction among extraversion, message type, and elaboration or a 3-way interaction among self-monitoring, message type, and elaboration.
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| [41] |
|
| [42] |
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| [43] |
Measuring event-related potentials (ERPs) has been fundamental to our understanding of how language is encoded in the brain. One particular ERP response, the N400 response, has been especially influential as an index of lexical and semantic processing. However, there remains a lack of consensus on the interpretation of this component. Resolving this issue has important consequences for neural models of language comprehension. Here we show that evidence bearing on where the N400 response is generated provides key insights into what it reflects. A neuroanatomical model of semantic processing is used as a guide to interpret the pattern of activated regions in functional MRI, magnetoencephalography and intracranial recordings that are associated with contextual semantic manipulations that lead to N400 effects.
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| [44] |
|
| [45] |
|
| [46] |
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| [47] |
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| [48] |
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| [49] |
Despite the availability of multiple safe vaccines, vaccine hesitancy may present a challenge to successful control of the COVID-19 pandemic. As with many human behaviors, people's vaccine acceptance may be affected by their beliefs about whether others will accept a vaccine (i.e., descriptive norms). However, information about these descriptive norms may have different effects depending on the actual descriptive norm, people's baseline beliefs, and the relative importance of conformity, social learning, and free-riding. Here, using a pre-registered, randomized experiment (N = 484,239) embedded in an international survey (23 countries), we show that accurate information about descriptive norms can increase intentions to accept a vaccine for COVID-19. We find mixed evidence that information on descriptive norms impacts mask wearing intentions and no statistically significant evidence that it impacts intentions to physically distance. The effects on vaccination intentions are largely consistent across the 23 included countries, but are concentrated among people who were otherwise uncertain about accepting a vaccine. Providing normative information in vaccine communications partially corrects individuals' underestimation of how many other people will accept a vaccine. These results suggest that presenting people with information about the widespread and growing acceptance of COVID-19 vaccines helps to increase vaccination intentions.© 2023. The Author(s).
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| [50] |
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| [51] |
If many people currently engage in a behavior, others are likely to follow suit. The current article extends research on these descriptive norms to examine the unique effect of trending norms: norms in which the number of people engaging in a behavior is increasing-and even if this is only among a minority of people: trending minority norms. The current research shows people conform more to these trending minority norms than a minority norm alone, or a no norm control condition-even though the norms addressed behaviors that differed from the target behavior. This demonstrates a distinct effect of trends and a strategy for leveraging normative information to increase conformity to behaviors not yet performed by a majority. Findings support that this increased conformity emerges because people predict the increase in prevalence will continue. An internal meta-analysis examining all data we collected on this topic supports these conclusions.
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| [52] |
Multinomial processing tree (MPT) models are a family of stochastic models for psychology and related sciences that can be used to model observed categorical frequencies as a function of a sequence of latent states. For the analysis of such models, the present article presents a platform-independent computer program called multiTree, which simplifies the creation and the analysis of MPT models. This makes them more convenient to implement and analyze. Also, multiTree offers advanced modeling features. It provides estimates of the parameters and their variability, goodness-of-fit statistics, hypothesis testing, checks for identifiability, parametric and nonparametric bootstrapping, and power analyses. In this article, the algorithms underlying multiTree are given, and a user guide is provided. The multiTree program can be downloaded from http://psycho3.uni-mannheim.de/multitree.
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| [53] |
Social norm interventions hold the potential to change people’s behavior. Five field experiments (N = 1,163) examined the effects of a simple and easily realizable social norm nudge based on the social media format “Be like Bill.” The nudge consisted of a stick figure named Toni that communicated descriptive and injunctive norms regarding pro-environmental or pro-social behaviors. Nudge conditions were compared to no-intervention control conditions. Experiment 1 (N = 179) focused on paper towel consumption in a women’s restroom at a German university. The nudge condition used less paper towels than the control condition, d = 0.48. Experiment 2 (N = 183) replicated this result (d = 0.32) in a more diverse setting of a women’s restroom at a German Christmas market. Experiment 3 (N = 250) examined differences in the effects of prescriptive (i.e., ‘do-norm’) versus proscriptive (i.e., ‘do not-norm’) social norms on paper towel consumption again in a university women’s restroom. The effectiveness of both social norm nudge conditions was shown in comparison to the control condition (d = 0.46; d = 0.40), while the prescriptive and proscriptive social norm manipulations did not differ. Experiment 4 (N = 206) applied the nudging approach to the use of plastic lids in a coffee shop, where no effect was found. Finally, Experiment 5 (N = 345) focused on the pro-social behavior of mask wearing in a bakery toward the end of the Covid-19 pandemic restrictions in Germany. In the nudge condition, more visitors put on face masks compared to the control group, d = 0.39. Limitations and contextual factors regarding the applicability of our social norm nudge are discussed.
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| [54] |
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| [55] |
Personal and social norms are well-established predictors of proenvironmental behavior, and past research often discusses the motivational properties of different norms. However, less research has examined how individuals feel after conforming to, or deviating from, a norm. We suggest that emotions may function as norm enforcement tools that reward conformity and punish deviance. As a starting point, we outline the emotions that individuals may experience when conforming to, or deviating from, different norms (i.e., personal norms, descriptive social norms, injunctive social norms), and how these emotions can influence proenvironmental behavior. More research is needed to clarify how emotions facilitate, and possibly mediate, the influence of norms on proenvironmental behavior.
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| [56] |
Accelerating the construction of the green supply chain system and improving the efficiency of the green supply chain is the key to promoting the high-quality development of enterprises. In view of this, based on stakeholder theory, higher order theory and expectancy theory, this study focuses on the impact of corporate social responsibility (CSR) on corporate green supply chain efficiency (GSCE) and the moderating role of chief executive officer (CEO) narcissism. A regression analysis of the observed sample reveals that CSR significantly enhances GSCE. Further decomposing CSR into internal CSR and external CSR to reveal the impact of different types of CSR on GSCE, we find that internal CSR fulfillment has a significant positive impact on GSCE, and this relationship is strengthened when CEOs are narcissistic. Furthermore, external CSR has a significant negative impact on GSCE, and this relationship is also strengthened by CEO narcissism. The main contribution of this paper is to study the relationship between CSR and green supply chain efficiency, decompose CSR into internal and external CSR, enrich the research on the intrinsic mechanism of value creation of CSR. It also enriches the research in the context of CSR from the perspective of CEO personality traits, providing new ideas and suggestions for manager selection and corporate greening governance in practice.
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| [57] |
Eye movements introduce large artifacts to electroencephalographic recordings (EEG) and thus render data analysis difficult or even impossible. Trials contaminated by eye movement and blink artifacts have to be discarded, hence in standard EEG-paradigms subjects are required to fixate on the screen. To overcome this restriction, several correction methods including regression and blind source separation have been proposed. Yet, there is no automated standard procedure established. By simultaneously recording eye movements and 64-channel-EEG during a guided eye movement paradigm, we investigate and review the properties of eye movement artifacts, including corneo-retinal dipole changes, saccadic spike potentials and eyelid artifacts, and study their interrelations during different types of eye and eyelid movements. In concordance with earlier studies our results confirm that these artifacts arise from different independent sources and that depending on electrode site, gaze direction, and choice of reference these sources contribute differently to the measured signal. We assess the respective implications for artifact correction methods and therefore compare the performance of two prominent approaches, namely linear regression and independent component analysis (ICA). We show and discuss that due to the independence of eye artifact sources, regression-based correction methods inevitably over- or under-correct individual artifact components, while ICA is in principle suited to address such mixtures of different types of artifacts. Finally, we propose an algorithm, which uses eye tracker information to objectively identify eye-artifact related ICA-components (ICs) in an automated manner. In the data presented here, the algorithm performed very similar to human experts when those were given both, the topographies of the ICs and their respective activations in a large amount of trials. Moreover it performed more reliable and almost twice as effective than human experts when those had to base their decision on IC topographies only. Furthermore, a receiver operating characteristic (ROC) analysis demonstrated an optimal balance of false positive and false negative at an area under curve (AUC) of more than 0.99. Removing the automatically detected ICs from the data resulted in removal or substantial suppression of ocular artifacts including microsaccadic spike potentials, while the relevant neural signal remained unaffected. In conclusion the present work aims at a better understanding of individual eye movement artifacts, their interrelations and the respective implications for eye artifact correction. Additionally, the proposed ICA-procedure provides a tool for optimized detection and correction of eye movement related artifact components.
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| [58] |
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| [59] |
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| [60] |
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| [61] |
Social norm appeals are effective in promoting sustainable majority behavior but could backfire when the target behavior is only performed by a minority of people. However, emphasizing that an increasing number of people have started engaging in the behavior or that the majority approve the behavior might prevent such negative effects. However, only a few studies have investigated the combination of descriptive minority and injunctive majority social norm appeals, with inconsistent results. Some studies of minority behavior suggest that the characteristics of recipients might determine the inconsistent results regarding the impact of minority social norm appeals and that social norm appeals could have a greater impact on individuals with weaker environment related dispositions.
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| [62] |
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| [63] |
Despite a long tradition of effectiveness in laboratory tests, normative messages have had mixed success in changing behavior in field contexts, with some studies showing boomerang effects. To test a theoretical account of this inconsistency, we conducted a field experiment in which normative messages were used to promote household energy conservation. As predicted, a descriptive normative message detailing average neighborhood usage produced either desirable energy savings or the undesirable boomerang effect, depending on whether households were already consuming at a low or high rate. Also as predicted, adding an injunctive message (conveying social approval or disapproval) eliminated the boomerang effect. The results offer an explanation for the mixed success of persuasive appeals based on social norms and suggest how such appeals should be properly crafted.
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| [64] |
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| [65] |
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| [66] |
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| [67] |
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| [68] |
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| [69] |
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| [70] |
In multi-attribute choice, people use heuristics to simplify decision problems. We studied the use of heuristic and rational strategies and their electrophysiological correlates. Since previous work linked the P3 ERP component to attention and decision making, we were interested whether the amplitude of this component is associated with decision strategy use. To this end, we recorded EEG when participants performed a two-alternative choice task, where they could acquire decision cues in a sequential manner and use them to make choices. We classified participants' choices as consistent with a rational Weighted Additive rule (WADD) or a simple heuristic Take The Best (TTB). Participants differed in their preference for WADD and TTB. Using a permutation-based single trial approach, we analyzed EEG responses to consecutive decision cues and their relation to the individual strategy preference. The preference for WADD over TTB was associated with overall higher signal amplitudes to decision cues in the P3 time window. Moreover, the preference for WADD was associated with similar P3 amplitudes to consecutive cues, whereas the preference for TTB was associated with substantial decreases in P3 amplitudes to consecutive cues. We also found that the preference for TTB was associated with enhanced N1 component to cues that discriminated decision alternatives, suggesting very early attention allocation to such cues by TTB users. Our results suggest that preference for either WADD or TTB has an early neural signature reflecting differences in attentional weighting of decision cues. In light of recent findings and hypotheses regarding P3, we interpret these results as indicating the involvement of catecholamine arousal systems in shaping predecisional information processing and strategy selection.
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| [71] |
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| [72] |
Previous neuroimaging studies have shown that implicit and explicit processing of self-relevant (schematic) material elicit activity in many of the same brain regions. Electrophysiological studies on the neural processing of explicit self-relevant cues have generally supported the view that P300 is an index of attention to self-relevant stimuli; however, there has been no study to date investigating the temporal course of implicit self-relevant processing. The current study seeks to investigate the time course involved in implicit self-processing by comparing processing of self-relevant with non-self-relevant words while subjects are making a judgment about color of the words in an implicit attention task. Sixteen low self-esteem participants were examined using event-related potentials technology (ERP). We hypothesized that this implicit attention task would involve P2 component rather than the P300 component. Indeed, P2 component has been associated with perceptual analysis and attentional allocation and may be more likely to occur in unconscious conditions such as this task. Results showed that latency of P2 component, which indexes the time required for perceptual analysis, was more prolonged in processing self-relevant words compared to processing non-self-relevant words. Our results suggested that the judgment of the color of the word interfered with automatic processing of self-relevant information and resulted in less efficient processing of self-relevant word. Together with previous ERP studies examining processing of explicit self-relevant cues, these findings suggest that the explicit and the implicit processing of self-relevant information would not elicit the same ERP components.Copyright © 2012 Elsevier B.V. All rights reserved.
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| [73] |
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