Physiological Responses to Near-Miss Outcomes and Personal Control During Simulated Gambling

Near-miss outcomes during gambling are non-win outcomes that fall close to a pay-out. While objectively equivalent to an outright miss, near-misses motivate ongoing play and may therefore be implicated in the development of disordered gambling. Given naturalistic data showing increases in heart rate (HR) and electrodermal activity (EDA) during periods of real gambling play, we sought to explore the phasic impact of win, near-miss and full-miss outcomes on physiological arousal in a controlled laboratory environment. EDA and HR were monitored as healthy, student participants (n = 33) played a simulated slot-machine task involving unpredictable monetary wins. A second gambling distortion, perceived personal control, was manipulated within the same task by allowing the participant to select the play icon on some trials, and having the computer automatically select the play icon on other trials. Near-misses were rated as less pleasant than full-misses. However, on trials that involved personal choice, near-misses produced higher ratings of ‘continue to play’ than full-misses. Winning outcomes were associated with phasic EDA responses that did not vary with personal choice. Compared to full-misses, near-miss outcomes also elicited an EDA increase, which was greater on personal choice trials. Near-misses were also associated with greater HR acceleration than other outcomes. Near-miss outcomes are capable of eliciting phasic changes in physiological arousal consistent with a state of subjective excitement, despite their objective non-win status.     

张曙光的学术研究之路

正张曙光1939年9月8日出生于陕西省长安县秦岭山脚下的一个普通农家。也许是出身贫苦家庭的缘故,张曙光一直保持着朴素的本色,无论是出席各种会议,还是接受媒体采访,他总是穿得很简单,从不西装革履打领带。即便是步入老年,他还经常挤公交车和地铁上下班。凭着勤奋好学的精神和顽强的毅力,1959年,张曙光顺利考入西北大学经济系统计学专业,开始了经济学的学习和训练。在校期间,对他影响最大的老师有何     

岐黄厚底好做面胡同深处西北仁

满目春色关不住，法源寺满园的丁香花又一次释放了那迷人的芬芳、热情肆意的春之气息。这春的气息仿佛有了普度众生的灵性，飘荡于周围的胡同中，沁入了百姓的心里。作为咱西城的根儿，小韩说打记事儿起就对这充满香气的胡同颇有感情，     

人口稀疏地区的环境保护问题

目前,环境保护成为全球亟待解决的问题.由于越来越多的地区参与到经济活动中,因而环境保护涉及包括人口稀疏地区在内的各个地区.在多数情况下,人为因素给环境带来了许多负面的影响. 环境问题不仅与整个国家相关,也与各个地区相关,包括俄罗斯的沃洛格达地区.     

Modelling human immunodeficiency virus ribonucleic acid levels with finite mixtures for censored longitudinal data

The measurement of human immunodeficiency virus ribonucleic acid levels over time leads to censored longitudinal data. Suitable models for dynamic modelling of these levels need to take this data characteristic into account. If groups of patients with different developments of the levels over time are suspected the model class of finite mixtures of mixed effects models with censored data is required. We describe the model specification and derive the estimation with a suitable expectation-maximization algorithm. We propose a convenient implementation using closed form formulae for the expected mean and variance of the truncated multivariate distribution. Only efficient evaluation of the cumulative multivariate normal distribution function is required. Model selection as well as methods for inference are discussed. The application is demonstrated on the clinical trial ACTG 315 data.     

区域经济现代化问题

20年前,俄罗斯向市场型社会经济生活组织的转型是复杂而充满矛盾的,原因之一是市场改革的战略和决策,原因之二是世界经济快速全球化背景下危机的表现方式. 在俄罗斯联邦第一任总统叶利钦执政时期,俄罗斯创建了大型民营企业、商业环境和市场基础设施.新社会秩序的基本步骤是建立在"休克疗法"基础之上,国家工业产值减少一半,固定资产投资减少五倍,就业率急剧下降,人民生活水平降低,国家的完整性也受到威胁.