网络游戏成瘾者认知功能损害的ERP研究

许多研究证明,网络成瘾具有和物质依赖成瘾相同的成瘾症状:不仅有明显的社会功能损害,而且表现出抑郁、强迫、焦虑等精神症状.本研究采用事件相关电位技术,以网络游戏成瘾大学生为被试,探索了网络游戏成瘾者脑认知功能的变化.结果发现:①成瘾者听觉P300的波幅显著低于非成瘾者,说明网络成瘾者可能存在认知功能的损害;②成瘾者听觉N1的波幅显著高于非成瘾者,提示成瘾者可能存在感觉功能的易化,或者受到感觉寻求人格特质的影响.     

Positivity and the Construction of Life Satisfaction Judgments: Global Happiness is not the Sum of its Parts

The present study investigated how reports of satisfaction with specific versus global domains can be used to assess a disposition towards positivity in subjective well-being reports. College students from 41 societies (N = 7167) completed measures of life satisfaction and ratings of global and specific aspects of their lives. For example, participants rated satisfaction with their education (global) and satisfaction with their professors, textbooks, and lectures (specific). It was hypothesized that global measures would more strongly reflect individual differences in dispositional positivity, that is, a propensity to evaluate aspects of life in general as good. At both the individual and national levels, positivity predicted life satisfaction beyond objective measures. Also, positivity was associated with norms about ideal life satisfaction such that countries and individuals who highly valued positive emotions were more likely to display positivity. The difference between more global versus more concrete measures of satisfaction can be used as an indirect and subtle measure of positivity.     

The Interpersonal Basis of Stereotype-Relevant Self-Views

ABSTRACT Recent research examining the interpersonal basis of self-stereotyping is considered from the perspective of Cognitive–Affective Personality System (CAPS) theory. The reviewed work shows that individuals tend to see themselves in a stereotypic manner when interacting with someone who engenders affiliative motivation and is thought to hold stereotypic views of their group. Evidence suggesting that this context-dependent self-stereotyping is extended temporally through future psychologically similar interactions and the invocation of significant others thought to endorse stereotypes is also discussed. These findings and the theoretical framework that stimulated them strongly resonate with the notion of if … then contingencies of the self articulated in CAPS theory. The implications of each viewpoint for the other are discussed.     

Neural Responses to Partner Rejection Cues

ABSTRACT— Little is known about neural responses in the early automatic-stage processing of rejection cues from a partner. Event-related potentials (ERPs) offer a window to study processes that may be difficult to detect via behavioral methods. We focused on the N400 ERP component, which reflects the amount of semantic processing prompted by a target. When participants were primed by attachment-related contexts ("If I need help from my partner, my partner will be …"), rejection-related words (e.g., dismissing ) elicited greater N400 amplitudes than acceptance-related words (e.g., supporting ). Analyses of results for nonattachment primes suggest that these findings were not simply caused by target valence; the brain responds differentially to cues of partner rejection (vs. acceptance) in under 300 ms. Moreover, these early-stage neurophysiological responses were heightened or dampened as a function of individuals' adult attachment; women characterized by high anxiety and low avoidance showed the greatest N400 responses to cues of partner rejection (vs. acceptance).     

大中学生对悲伤与愉快面孔区分的特征比较

采用面孔识别研究范式和事件相关电位方法,研究初中生、高中生和大学生三个年龄段被试情绪面孔加工特征。研究发现,在刺激呈现后的550~800ms,三个年龄段被试均产生悲伤效应,悲伤面孔引发的LPC波幅大于愉快面孔引发的LPC波幅,三个年龄段的悲伤效应脑区分布大致相同,表明三个年龄段情绪面孔加工有着类似的神经机制。进一步比较三个年龄段悲伤面孔引发的ERPs发现,在刺激呈现后的200~550ms,悲伤面孔的加工产生年龄效应。年龄段越低的被试N2波幅越大,年龄段越高的被试P3波幅越大。这一结果提示,随着年龄的增长,青少年大脑高级功能的发育日趋成熟。     

Understanding the impact of the Hajj: Explaining experiences of self-change at a religious mass gathering

Previous research has shown that participation in the Hajj pilgrimage to Mecca can lead to both more positive outgroup attitudes and increased commitment to Muslim identity. We describe a survey of pilgrims (N = 1,176) carried out at Mecca, during the Hajj, which tested explanations for these experiences of self-change at the time of their occurrence. In line with contact theory, perceived cooperation among pilgrims indirectly predicted more positive outgroup attitudes (as well as enhanced Muslim identification), via identification with the crowd. In line with social identity and identity congruence explanations, positive emotional experience and the perception that the crowd embodied the Muslim value of unity predicted self-change variables through identification with the crowd. The finding that participation in an all-Muslim gathering increases positive views of other groups (including non-Muslims) through identification with the crowd offers an alternative perspective to suggestions that such gatherings might encourage intolerance.     

Psychological resilience and dysfunction among hospitalized survivors of the SARS epidemic in Hong Kong: a latent class approach

OBJECTIVE: To examine trajectories of psychological functioning using latent class analysis on a sample of hospitalized survivors of the 2003 severe acute respiratory syndrome (SARS) epidemic in Hong Kong. DESIGN: A longitudinal study of 997 survivors, recruited from among 1,331 individuals hospitalized for SARS, were interviewed at 6, 12, and 18 months after hospitalization. MAIN OUTCOME MEASURES: Psychological and physical functioning at each time point was measured using the 12-item Medical Outcome Study Short-Form Health Survey (SF-12). RESULTS: Four latent classes were identified--chronic dysfunction, delayed dysfunction, recovery, and resilience. All groups had better physical health than the chronic group. Resilient and recovered individuals had greater social support and less SARS-related worry, and resilient individuals were more likely to be male. The resilient group also had greater social support than the delayed group and better physical functioning than the recovered group. CONCLUSION: This study demonstrated that longitudinal outcome trajectories following a major health-threat event in an Asian sample bear close resemblance to prototypical trajectories observed in trauma studies using Western samples. Unique predictors of the trajectories included factors observed in previous studies, such as social support, as well as factors of particular relevance to a major disease outbreak, such as SARS-related worry.     

Expectations and beyond: The nexus of AI instrumentality and brand credibility in voice assistant retention using extended expectation-confirmation model

AI-based voice assistants (AIVA) are capable of interpreting human speech and responding with useful information, aiding with tasks, and controlling other devices. The usage of these AIVAs has grown significantly worldwide. Despite this growth, studies on user behavior related to continued usage intention of AIVAs and effects on the long-term commercial sustainability of brands, remain low. What is less understood is the potential of AI instrumentality attributes and brand credibility components in provoking shifts in post-use behavior of AIVAs. This study proposes a model which expands on the Expectation-Confirmation Model for user continuance behavior of AIVAs, by integrating user's technology related traits, AI instrumentality attributes and brand credibility. To verify the research hypotheses, the study employed partial least square—structural equation modelling, based on 281 validated responses of a survey. This study highlights the significance of Optimism, Innovativeness, and Discomfort for post-adoption confirmation. Higher post-adoption confirmation is strongly associated with perceived intelligence, anthropomorphism, information quality, and system quality. Anthropomorphism and information quality are key factors for brand expertise, while anthropomorphism and system quality are significant for brand trustworthiness. The study confirms that brand expertise and trustworthiness lead to post-use satisfaction and use continuance intention. Understanding the antecedents of satisfaction and continuance intention extends the existing literature on AIVAs and provides valuable insights for academics and practitioners alike. Some implications for researchers and managers are discussed.