网络游戏成瘾量表研究——事件相关脑电位辅助分析

在我国网络游戏产业发展迅猛,网民数量持续高速增长,但同时也出现了网游玩家沉迷于网络游戏中而产生心理依赖的成瘾症状.目前对网络成瘾的概念、界定指标和测量工具都存在较大争议,缺乏网络成瘾界定的系统研究.本研究在以往多种量表的基础上,采用事件相关脑电位方法,采用成瘾Stroop实验范式,找到了可以区分网络游戏成瘾者和正常网络使用者的客观电生理指标,验证了这个分类.通过对这群已经被验证了的两组被试的问卷测量,形成了"网络游戏成瘾量表",并依据测量结果,给出了推断被试是否成瘾的总分分界值.然后,采用重测信度方法,验证了量表的稳定性和可靠性.最后,用测量预留的成瘾被试,验证了"网络游戏成瘾量表"的有效性.     

Online Teaching in Social Work Education: Understanding the Challenges

There is a rapidly growing industry of online learning and distance education programs at the Master of Social Work and Bachelor of Social Work levels both within Australia and globally. A number of best practices have emerged from the literature that warrant consideration when delivering social work programs in online learning and distance education modes. Given the significant advancements in technology that are likely to continue into the next decades, social work academic leaders and accrediting bodies must be prepared to address the changing landscape of higher education, including limited financial resources. Social work academics need to become aware and implement best practices in online learning and distance education e-teaching environments to ensure positive student outcomes, student retention, and student engagement to meet the flexibility needs of students in higher education settings. The purpose of this paper is to identify and discuss the challenges and benefits of distance education and online learning for consideration when providing a social work program in these delivery models.

IMPLICATIONS

• Given the significant advancements in technology that are likely to continue into the next decades, social work academic leaders and accrediting bodies must be prepared to address the changing landscape of higher education.

• Social work academics need to become aware and implement best practices in the distance education and online teaching environment to ensure positive student outcomes, student retention, and student engagement to meet the flexibility needs of students in higher education settings.

     

A Note on Item Response Theory Modeling for Online Customer Ratings

ABSTRACT

Online consumer product ratings data are increasing rapidly. While most of the current graphical displays mainly represent the average ratings, Ho and Quinn proposed an easily interpretable graphical display based on an ordinal item response theory (IRT) model, which successfully accounts for systematic interrater differences. Conventionally, the discrimination parameters in IRT models are constrained to be positive, particularly in the modeling of scored data from educational tests. In this article, we use real-world ratings data to demonstrate that such a constraint can have a great impact on the parameter estimation. This impact on estimation was explained through rater behavior. We also discuss correlation among raters and assess the prediction accuracy for both the constrained and the unconstrained models. The results show that the unconstrained model performs better when a larger fraction of rater pairs exhibit negative correlations in ratings.     

The shadows know me: Exploring the dark side of social media in the healthcare field

Nowadays, the increasing attention paid to the dark side of social media (SM) in the field of healthcare management has moved both researchers and practitioners to investigate the impact of Web 2.0 technologies with reference to SM, because of continuous distortion created by these SM platforms for patients and the real dark side they constitute, which affects both the patient sphere and its relative empowerment.Based on previous theoretical and managerial contributions, the paper aims to investigate both the bright and dark side of the effects of SM in the healthcare field, which affect improvements in patient empowerment. Notwithstanding, the exploratory study was developed through a common theoretical and conceptual framework to improve the understanding of emerging social and economic dynamics towards the paradigm provided by many studies on the dark side of Web 2.0.So far, established on previous contributions to the healthcare management domain, the exploratory study identifies a set of variables related to the conceptualisations of patient empowerment and the dark side of SM, with reference to cases of digital users both with and without chronic illnesses.Moving deeper, matching qualitative and quantitative approaches, the impact of the dark side of SM on patient empowerment was investigated using structural equation modelling through SPSS and R softwares, sampling about 650 individuals on the Italian population using computer-assisted web interviewing.Finally, results highlight considerable correlations between many dimensions explaining patient empowerment and the dark side of SM, showing a positive effect on the improvement in patient engagement, but potential critical risks and concerns due to a misinterpretation of online information highlighting the dark side of SM.     

Anti-Afropolitan ethics and the performative politics of online scambaiting

ABSTRACT

Online scambaiting problematises the identity of the 419 scammer whose virtual labours connect significantly to the digital dimensions of Afropolitanism. When examined through the photographic practices demanded of 419 scammers in several Internet communities, scambaiting, a form of Internet vigilantism that is targeted at online scammers to avert scam, produces epistemic violence which evacuates the black male body of human dignity. Although scambaiting is potentially an ethical project, it embeds a system of oppression that generates Afropolitan masculinities, caricatured performances of the bodies of 419 scammers exhibited online as objects of shame. As a philosophical and aesthetic response to translocality and mobility, Afropolitanism stresses the cultural experiences and agency of ordinary Africans who assert a global sense of awareness. As both the Afropolitan subject and the 419 scammer are entangled in the assertion of agency, the globalism of both is shown to converge at the intersection of the digital. Building on Lisa Nakamura's essay on dogshaming, I argue that the sexual exploitation of black bodies on scambaiting websites gestures at technology's complicity in interpellating digital subjects and circulating social injustices. Unlike Nakamura, I foreground the performative aspects of scambaiting and connect these to Afropolitanism's intrinsic digitality.     

证券业的新变革——网络券商的兴起

国际网络的快速发展，改变着人类的生活方式，亦改变着企业的经营模式。善用此一高新技术以增强竞争力，是现代企业经营必须强化的课题。对证券业这种知识型的产业而言，客户重视服务、效率、准确、安全，并能以更节约方式达到理财的目的，网络上的投资理财更是证券业者必须提供的服务。尤其加入世界贸易组织的进程不远，证券业者必须思考面对国外传统大型投资银行的竞争，把握网际网络这一新科技的特性，在这虚拟的新战场树立中国投资银行经营之典范。     

Expanding community: The internet and relational theory

Internet communities have received mostly negative appraisals among psychologists. Being on line is viewed as damaging to one's social relationships. In 1996, a group of therapists studying relational theory formed an online community. Our group has been a positive influence, expanding the idea that it is possible to have a vibrant and socially enhancing community online. Entre psicologos, han sido principalmente negativas las evaluaciones de las comunidades internet. Estar 'online' se considera perjudicial para las relaciones sociales. En el ano 1996, un grupo de terapeutas que estudiaban teoria relacional formaron una comunidad online. Nuestro grupo ha sido una influencia positiva, extendiendo asi la idea que puede existir una comunidad online efervescente y de realce social.     

The impact of green initiatives on environmental legitimacy and admiration of the organization

Communication about environmental policies and practices has become a critical area of focus for corporations. Through an online experiment this study explored the impact of awareness of environmental initiatives on perceived environmental legitimacy and the subsequent impact of legitimacy on organizational admiration. Findings suggest that raising awareness of an organization's environmental initiatives improves environmental legitimacy; however, investigation of the relationship between legitimacy and admiration found that only one dimension of environmental legitimacy influences the level of admiration of an organization.     

Online interval scheduling: randomized and multiprocessor cases

We consider the problem of scheduling a set of equal-length intervals arriving online, where each interval is associated with a weight and the objective is to maximize the total weight of completed intervals. An optimal 4-competitive algorithm has long been known in the deterministic case, but the randomized case remains open. We give the first randomized algorithm for this problem, achieving a competitive ratio of 3.5822. We also prove a randomized lower bound of 4/3, which is an improvement over the previous 5/4 result. Then we show that the techniques can be carried to the deterministic multiprocessor case, giving a 3.5822-competitive 2-processor algorithm, and a 4/3 lower bound for any number of processors. We also give a lower bound of 2 for the case of two processors. A preliminary version of this paper appeared in the Proceedings of COCOON 2007, LNCS, vol. 4598, pp. 176–186. The work described in this paper was fully supported by a grant from City University of Hong Kong (SRG 7001969), and NSFC Grant No. 70525004 and 70702030.     

Theory of change models deepen online learning evaluation

Massive Open Online Courses (MOOCs) have gained traction as resources for professional development. This article presents the method that we used to evaluate a professional development MOOC for postdoctoral trainees that was created by a university consortium in the US. Most approaches to evaluating MOOCs focus on analysis of participation, outcomes from course assignments, self-reported learning outcomes, course completion and user pathways through the online content or clickstream data. Few published evaluations describe in detail how learning happens within online courses and the anticipated medium and longer term cognitive and behavioral outcomes on participants. This work aims to guide those who are designing, implementing and evaluating MOOCs through applying theories of change to focus evaluation on the process of learning. This approach can be used as a complement to traditional approaches for evaluating MOOCs. We described how we worked with the MOOC team building the content to develop a theory of change for each module (or lesson) within the MOOC and used the theory of change to guide evaluation of short and medium term participant cognitive, affective and attitudinal, and behavioral outcomes. Finally, we share lessons learned and suggestions for implementing theories of change in both the design and evaluation phases of MOOC development.