Automating argument construction

Over the past five years the Artificial Intelligence Center at SRI has been developing a new technology to address the problem of automated information management within real- world contexts. The result of this work is a body of techniques for automated reasoning from evidence that we call evidential reasoning. The techniques are based upon the mathematics of belief functions developed by Dempster and Shafer and have been successfully applied to a variety of problems including computer vision, multisensor integration, and intelligence analysis.

We have developed both a formal basis and a framework for implementating automated reasoning systems based upon these techniques. Both the formal and practical approach can be divided into four parts: (1) specifying a set of distinct propositional spaces, (2) specifying the interrelationships among these spaces, (3) representing bodies of evidence as belief distributions, and (4) establishing paths of the bodies for evidence to move through these spaces by means of evidential operations, eventually converging on spaces where the target questions can be answered. These steps specify a means for arguing from multiple bodies of evidence toward a particular (probabilistic) conclusion. Argument construction is the process by which such evidential analyses are constructed and is the analogue of constructing proof trees in a logical context.

This technology features the ability to reason from uncertain, incomplete, and occasionally inaccurate information based upon seven evidential operations: fusion, discounting, translation, projection, summarization, interpretation, and gisting. These operation are theoretically sound but have intuitive appeal as well.

In implementing this formal approach, we have found that evidential arguments can be represented as graphs. To support the construction, modification, and interrogation of evidential arguments, we have developed Gister. Gister provides an interactive, menu-driven, graphical interface that allows these graphical structures to be easily manipulated.

Our goal is to provide effective automated aids to domain experts for argument construction. Gister represents our first attempt at such an aid.     

社会转型期助人被讹现象的人类学分析

历史经验表明,现代化过程往往会导致传统与现代在价值观、道德判断和行为规范方面的冲突;当代中国也不可避免要经历这些变化。通过分析助人被讹现象的特点、社会原因和道德后果,试图揭示社会转型期间两种伦理体系的冲突及其对个体行动者的影响。文章将首先考察"做好事被讹"现象的主要特征。大多数讹人者都是那些本该获得同情和帮助的年长者。再将探讨"做好事被讹"现象对社会的多方面影响,认为"做好事被讹"事件尽管少有发生,但它对社会信任、同情和道德互惠原则造成了重创。最后探究导致这种令人恼火的行为产生的多种社会原因,也广泛讨论了当代中国社会的道德风貌。     

Psychometric Evaluation of the Hebrew Language Version of the Satisfaction with Life Scale

The satisfaction with life scale (SWLS) is a widely accepted and widely used tool for measuring well-being. Although its potential as a cross-cultural index is recognized, an introduction and systematic validation of the Hebrew version is needed. Thus, the purpose of this study is: (1) to describe the process of developing the Hebrew version of the SWLS, and (2) to examine its construct validity as well as its internal consistency. Four hundred and eighty seven working adults completed the following self reported Hebrew language versions of the: (1) SWLS, (2) positive affect and negative affect scales (PANAS), and (3) the self-rated health (SRH) scale. In addition, as way of gathering additional evidence of validity, the SWLS was completed by proxy (i.e., each participant’s life partner or significant other). Confirmatory factor analysis supported a single-factor structure with significant correlations between the SWLS and the rest of the measures—PANAS scores, the SRH scores as well as the SWLS scores as measured by proxy. In addition, item-analysis supports the internal consistency of the scale. The Hebrew version of the SWLS is a valid and reliable scale and can be utilized in the Israeli context.     

Investigating Validity Evidence of the Satisfaction with Life Scale Adapted for Children

This study introduces the Satisfaction with Life Scale adapted for Children (SWLS-C) and presents psychometric findings regarding its validation. The SWLS-C was adapted from the Satisfaction with Life Scale (SWLS; Diener et al. 1985), which is one of the most commonly used measures to assess satisfaction with life in adults. Three subject matter experts adapted the SWLS by changing the wording of the item stem and response format in order to make it more understandable for children. A stratified random sample of 1,233 students (48% girls) in grades 4–7 (mean age 11 years and 7 months) provided data on the SWLS-C and measures of optimism, self-concept, self-efficacy, depression, emphatic concern, and perspective taking. The SWLS-C demonstrated a unidimensional factor structure and high internal consistency. Furthermore, differential item functioning and differential scale functioning analyses indicated that the SWLS-C measures satisfaction with life in the same way for different groups of children (i.e., with regard to gender, first language learned at home—English vs. other language(s) than English—and across different grades) at the item and at the scale level. Associations between scores on the SWLS-C and demographic variables were statistically non-significant or of small effect size. In addition, the SWLS-C showed evidence of convergent and discriminant validity in relation to the other measures. Our results indicate that the SWLS-C is a psychometrically sound instrument that demonstrated evidence of construct validity for this age group. Limitations and future directions are discussed.     

地震致残者生存状态与需求分析——来自四川省汶川地震灾区的调查

文章通过对汶川地震灾区调查所获数据,介绍震区致残者的基本情况,对其生存状态和需求进行分析。调查显示,地震致残者的生存状态不容乐观,其住房状况较差,婚姻问题多样,就业率和就业层次较低,社会保障力度相对薄弱,其中农村地震致残者的问题尤为突出。整体而言,由于特惠政策不到位等原因导致其核心需求满足低,长远需求与供给存在一定程度错位。另外,心理康复工作不完善使其全面康复得不到保障。针对地震致残者面临的现实问题,作者提出了一些相应的对策建议。     

Government Capital,Intimate and Community Social Capital,and Food Security Status in Older Adults with Different Income Levels

Whether government‐based forms of food assistance such as the Supplemental Nutrition Assistance Program (SNAP), communal efforts including food pantries, aid from friends and family, or alternative means such as gardening are the appropriate means to reduce the prevalence of household food insecurity is a continuous source of policy contention. To inform this debate, we examine the relative importance of these forms of food assistance and acquisition to a sample of U.S. older adults from the 2010 Brazos Valley Health Assessment of central Texas households that have been stratified by income eligibility for SNAP, low‐income SNAP ineligibility, and above low income status. To identify how membership in these socioeconomic groups constrains household capacity to acquire sufficient food to maintain an adequate and healthy diet, we explore the varied associations of assets received from government; communal and intimate social networks; and alternative food sources such as gardening, hunting, and fishing with household food security across socioeconomic status, while examining the importance of place of residence on the use of capital assets. SNAP participation was the only specific capital asset associated with all levels of food insecurity for both SNAP‐eligible and ineligible low‐income groups, thus emphasizing the continued importance of food assistance among poverty‐level older adults.     

Structured Voluntary Youth Activities and Positive Outcomes in Adulthood: An Exploratory Study of Involvement in Scouting and Subjective Well-Being

This study explores whether youth involvement in Scouting has positive consequences later in life. We examine whether the number of years of participation in Scouting is positively associated with human and social capital and recreational lifestyles in adulthood, and whether these are linked to subjective well-being: relational, emotional, and physical health. To explore this potential relationship, we estimated a structural equation model, analyzing data from a national sample of adult males. We found that youth involvement in Scouting is positively related to subjective well-being indirectly via the positive adult outcomes.     

Male Clients of Male Escorts: Satisfaction,Sexual Behavior,and Demographic Characteristics

Few studies have examined male clients who pay for sex with male escorts. In 2012, clients (n = 495) completed an online survey about their most recent hire. Most clients were White/Caucasian (87.7%), HIV negative (89.5%), employed full time (71.1%), single (58.6%), with a mean age of 54. Three-quarters of clients were gay identified, 18% bisexual, and 4% heterosexual. The median rate paid to escorts was $250 per hour with a modal appointment time of 1 to 2 hours (41.6%). Oral sex was common (80% gave, 69% received), 30% reported anal insertive sex, and 34% reported anal receptive sex. In total, few (12%) reported unprotected anal sex. Satisfaction with encounters was high. Receptive unprotected anal intercourse was associated with greater satisfaction in bivariate analyses but not in multivariable analyses. In a multivariable model, having receptive anal sex (whether protected or not) and rating the financial cost of the encounter as “worth it” were significantly associated with greater satisfaction. This study contributes to a scarce literature regarding clients of male sex workers and, in particular, provides information on the characteristics of men hiring men for sexual services, behavioral event-level data about their encounters, and analysis of factors directly associated with client satisfaction.     

The Modern Mystique: Institutional Mediation of Hegemonic Motherhood

This study examines the means by which privileged mothers comply to the dominant expectations of intensive mothering. As women struggle with the complicated, and often contradictory, experience of meeting the demands of the dominant ideology, we examine the mediating role of an institution, in this case the most popular maternal support organization in the United States—Mothers of Preschoolers (MOPS). Organizations such as MOPS create an ideal cultural site for reinforcing ideologies that promulgate unattainable standards of perfection. Data were collected from observations of two MOPS groups, in‐depth interviews, and ethnographic content analysis of organizational materials. This dominant organization supports mothers by discouraging them from questioning the expectations of intensive mothering or considering alternative methods of parenting, which reinforces intensive mothering as the gold standard of parenting.     

浙江非公企业劳资矛盾与工会调节作用研究——基于农民工租住地工会的实证研究

随着社会经济的发展,非公有制经济对我国经济的贡献越来越大,非公有制企业的劳资关系问题也日益突出.今天的中国,尽管工会面临着种种困境,但工会的作用仍然很重要.当前迫切需要解决的是工会代表工人利益的有效性问题.农民工租住地工会通过组建工会的方式吸纳农民工精英进入工会管理层,并动员农民工参与社区的公共生活,逐渐使他们产生了“社区认同”,农民工管理发生了由社会被动防控与管理型向主动引导、服务、建设型的转变,由分割向融合的转变,破解工会在农民工集聚的地方如何组织管理与协调劳资矛盾,促成了社区的和谐与稳定.探讨市场经济条件下企业外工会力量的成长或许能为中国工会转型提供一些借鉴和帮助,为转型期创新社会管理提供有益探索.