Axiomatization and implementation of a class of solidarity values for TU-games

A new class of values combining marginalistic and egalitarian principles is introduced for cooperative TU-games. It includes some modes of solidarity among the players by taking the collective contribution of some coalitions to the grand coalition into account. Relationships with other class of values such as the Egalitarian Shapley values and the Procedural values are discussed. We propose a strategic implementation of our class of values in subgame perfect Nash equilibrium. Two axiomatic characterizations are provided: one of the whole class of values, and one of each of its extreme points.     

Sex Partner Type,Drug Use and Condom Use Self-Efficacy Among African Americans from Disadvantaged Neighborhoods: Are Associations with Consistent Condom Use Moderated by Gender?

Gender inequalities in sexual behavior are explored from the perspective of the theory of gender and power. This study focused on the effect of sex partner type (steady versus casual), drug use, and condom use self-efficacy regarding consistent condom use (CCU) among a community-based sample of adults. The sample included 1,357 African American men and women (M age 37.0, SD 13.1 years; 44% women, 66% men) from 61 disadvantaged census block groups in Atlanta, GA as part of a study of individual and neighborhood characteristics and HIV risk-taking. Having a steady partner decreased the odds of CCU, while higher condom use self-efficacy increased the odds of CCU. Among non-drug users, having a drug-using partner was associated with decreased odds of condom use for women only. Women with drug-using partners, especially a steady partner, were least likely to report CCU. Therefore, interventions intended to empower CCU among women need to expand beyond acknowledging the reduced control that women who use drugs demonstrate to also consider those who have drug-using sexual partners.     

Urban forest structure,ecosystem services and change in Syracuse,NY

The tree population within the City of Syracuse was assessed using a random sampling of plots in 1999, 2001 and 2009 to determine how the population and the ecosystem services these trees provide have changed over time. Ecosystem services and values for carbon sequestration, air pollution removal and changes in building energy use were derived using the i-Tree Eco model. In addition, photo interpretation of aerial images was used to determine changes in tree cover between the mid-1990s and 2009. Between the mid-1990s and 2003, tree cover in Syracuse exhibited a decline from 27.5 to 25.9 %, but subsequently increased to 26.9 % by 2009. The total tree population exhibited a similar pattern, dropping from 881,000 trees in 1999 to 862,000 in 2001, and then increasing to 1,087,000 trees in 2009. Most of this increase in the urban tree population is due to invasive or pioneer trees species, particularly Rhamnus cathartica, which has more than tripled in population between 2001 and 2009. Insects such as gypsy moth and emerald ash borer pose a substantial risk to altering future urban forest composition. The annual ecosystem services provided by the urban forest in relation to carbon sequestration, air pollution removal and reduction in building energy use are estimated at about $2.4 million per year. An improved understanding of urban forests and how they are changing can facilitate better management plans to sustain ecosystem services and desired forest structure for future generations.     

Derogating benevolent behavior of deviant in-group members: group processes within a real-life sample of heterosexual Christians

How do people evaluate potentially good and desirable behavior by others? We investigate how participants (N = 154) evaluate a couple that wants to adopt an orphan that would otherwise die. We collected data from heterosexual Christians in two cities in the Dutch Bible belt. We manipulated whether the adoptive-parents-to-be were a heterosexual couple or a lesbian couple and whether the couple self-identified as devout Christians or not. Using a subjective group dynamics account, we predicted and found that participants evaluated the lesbian couple in more negative terms than the heterosexual couple, especially when this couple was also Christian. These findings illustrate how positive behavior is derogated when displayed by in-group deviants.     

Neutralizing Problematic Frames in the Culture Wars: Anti‐Evolutionists Grapple with Religion

This article contributes to the literature on culture wars work by examining how anti‐evolutionists neutralize the framing of their position as religious. Their efforts are uncovered by analyzing 570 letters to the editor published in American newspapers in the months surrounding a nationally covered 2005 federal judicial decision on the legality of the Dover PA, school board's decision to undermine evolutionary theory in the classroom. Anti‐evolutionists neutralized the framing of their position as religious through the processes of selective acknowledgement and disagreement with the problematic framing. These findings provide insights into the anti‐evolutionist movement, the nature of the culture wars, and the basic ways in which problematic frames are neutralized. First, it shows how public anti‐evolutionist discourse has not followed its leaders' efforts to minimize the religious motivations of the movement. Second, the wide variety of neutralizations partially explains the persistence of many cultural disputes. Third, this study calls attention to the under theorized role of disagreement and agreement in undoing problematic definitions of the situation.     

Academic Procrastination in STEM: Interactive Effects of Stereotype Threat and Achievement Goals

A host of academic outcomes have been investigated as consequences of stereotype threat for women in science, technology, engineering, and mathematics (STEM), including attrition and decreased academic performance. However, the role of a potentially important precursor to these negative outcomes—academic procrastination—remains unclear. The present research sought to address this issue. University students (N = 223) enrolled in biology, chemistry, physics, and psychology courses participated in the study. Mastery approach, mastery avoidance, and performance avoidance achievement goals were hypothesized to moderate the effect of stereotype threat on academic procrastination. Results indicated significant interactions for women but not for men; however, interactions were not in the hypothesized direction for the avoidance goal moderators. Mastery approach goals exerted a significant buffering effect on the stereotype threat–academic procrastination relationship, but, contrary to prediction, both mastery avoidance and performance avoidance goals exerted a significant buffering effect. Implications for career‐related outcomes among women in STEM are discussed.     

Efficacy of a Web‐based Intervention for Concerned Spouses of Service Members and Veterans with Alcohol Misuse

Concerned partners (CPs) of service members and veterans who misuse alcohol face help‐seeking barriers and mental health problems. We used multiple regression to evaluate the efficacy of Partners Connect, a four‐session web‐based intervention (WBI) to address military CPs’ mental health and communication. We randomized 312 CPs to the WBI or a control group. Five months later, WBI CPs reported significant reductions in their anxiety and increases in their social support compared to control CPs. Intervention dose was also associated with improved WBI CP outcomes. Partners Connect appears to fill a need for families who face help‐seeking barriers and provides an alternative to traditional care for those who may not otherwise seek help.     

Disability-based inequity in youth subjective well-being: current findings and future directions

This selective, critical literature review synthesizes recent research exploring disability-based disparities in the subjective well-being and living conditions of youth in high-income countries. Compared with their non-disabled peers, disabled youth report lower levels of happiness, lower global life satisfaction and higher rates of suicidal ideation. Emerging evidence suggests that the relatively poor subjective well-being of disabled youth reflects, at least in part, differential access to material and social resources rather than the presence of chronic conditions or impairment per se. These findings indicate that disability-based disparities in youth subjective well-being are socially patterned and preventable.     

Adolescent Pathways to Co‐Occurring Problem Behavior: The Effects of Peer Delinquency and Peer Substance Use

Delinquency and substance use are more likely to co‐occur in adolescence compared to earlier and later developmental periods. The present study examined developmental pathways to co‐occurring problem behavior from 6th to 10th grade (N = 2,002), testing how peer delinquency and substance use were linked to transitioning between abstaining, delinquency, substance use, and co‐occurring problem behavior. Developmentally, most youth transition from abstinence to delinquent behavior and then escalate to co‐occurring problem behavior. Once co‐occurring problem behavior onsets, remitting to single‐problem behavior or abstinence is unlikely. The impact of peers on problem behavior is domain‐specific when individuals transition from abstaining to a single‐problem behavior, but is more general with respect to escalation of and desistance from problem behavior.     

Training time estimation to improve alarm reactions

Prior researchers have demonstrated that training may be an effective strategy for improving operator reactions to alarm systems with less than perfect reliability. Of the training strategies tested, recognition of temporal patterns in prior sensor activations seems to offer the greatest promise for improving the speed and appropriateness of subsequent alarm reactions. The current research was completed to clarify which of three temporal interval training methods leads to the most appropriate alarm reactions. Fifty-six undergraduates evaluated whether alarms occurring after sensor activations were true or false, based on elapsed time between the sensor signals and the alarm signals. Participants completed five training sessions to learn to estimate time intervals using simple repetition training, performance feedback, or performance feedback plus subdivision cues. Contrary to expectations, results indicated that participants did not benefit differentially from temporal interval training. Differences between pre- and posttest interval estimation performance was similar among groups, and training groups performed comparably when reacting to signals. Participants generally focused on advertised alarm system reliability, responding more appropriately and more quickly to lower reliability alarms. Future researchers and designers should replicate these findings with realistic tasks and real-world complex task operators to determine their generalization.