Solving Games with Functional Regret Estimation

We propose a novel online learning method for minimizing regret in large extensive-form games. The approach learns a function approximator online to estimate the regret for choosing a particular action. A no-regret algorithm uses these estimates in place of the true regrets to define a sequence of policies. We prove the approach sound by providing a bound relating the quality of the function approximation and regret of the algorithm. A corollary being that the method is guaranteed to converge to a Nash equilibrium in self-play so long as the regrets are ultimately realizable by the function approximator. Our technique can be understood as a principled generalization of existing work on abstraction in large games; in our work, both the abstraction as well as the equilibrium are learned during self-play. We demonstrate empirically the method achieves higher quality strategies than state-of-the-art abstraction techniques given the same resources.Comment: AAAI Conference on Artificial Intelligence 201

Parental Socialization and Children’s Susceptibility to Alcohol Use Initiation

ABSTRACT. Objective: This study examined relations between children’s susceptibility to alcohol use initiation and parents’ alcohol-specific beliefs, attitudes, and practices and whether these relations vary by parental alcohol use. Method: The sample comprised 1,050 pairs of mothers or mother surrogates and their third-grade children (51.8% female) recruited for a 4-year intervention trial. Families were recruited from school districts located primarily in North Carolina; the school districts provided permission for study recruitment materials to be distributed to families but were not otherwise involved in the research. Data are from the baseline cross-sectional telephone interviews conducted with the mothers and children. Children’s susceptibility to alcohol use initiation is based on child reports, and parental alcohol-specifi c beliefs, attitudes, and practices are based on maternal reports. Results: All parental alcohol socialization attributes were statistically signifi cantly associated as hypothesized with child susceptibility to alcohol use initiation. In the final full model, the mother’s disapproving attitude about child sipping and the interaction between mother–child communication and parental alcohol use frequency were uniquely signifi cantly associated with child susceptibility. Talking with the child about harmful consequences of alcohol use was associated with reduced child susceptibility in families where parents drank alcohol more frequently but had no relationship with child susceptibility in families where parents drank infrequently. Conclusions: The normative interactions that parents have with their elementary school children may inhibit or facilitate children’s susceptibility to alcohol use. To the extent that child susceptibility leads to early onset of use, prevention programs directed at parents to reduce child susceptibility are indicated

Effects of Work Permits on Illegal Employment Among Youth Workers: Findings of a School-Based Survey on Child Labor Violations

We compared self-reported child labor violations between teenagers with and without work permits. Data were obtained from a school-based survey of working teenagers in 16 randomly selected high schools in North Carolina. We examined associations between work hour violations, hazardous order violations (performance of illegal tasks), and possession of a work permit. Work permits appear to be protective against performance of illegal tasks but not against work hour violations, demonstrating the need for stricter enforcement policies and improvements in work permit screening processes

Attitudes to Interpersonal Touch in the Workplace in Autistic and non-Autistic Groups

Unemployment and underemployment have consistently been shown to be higher in autistic adults relative to non-autistic adults. This may be due, in part, to a lack of workplace accommodations being made for autistic people. One factor that may contribute to employment inequalities in autistic people is differences in attitudes towards interpersonal touch. This study acts as a preliminary investigation into whether employed autistic and non-autistic participants differ in their attitudes towards touch in the workplace, and in their loneliness and wellbeing. The current dataset was drawn from a larger online survey (the Touch Test) designed to explore attitudes and experiences towards touch. We found that employed autistic participants had more negative attitudes to general, social and workplace touch relative to non-autistic participants. Autistic participants also experienced greater loneliness and reduced wellbeing. Attachment-related anxiety was the only significant predictor of wellbeing in employed autistic adults. However, attachment-related anxiety, general attitudes to touch and the role of touch in the workplace predicted wellbeing in employed non-autistic adults. With regards to loneliness, general attitudes to touch and the role of touch in the workplace predicted loneliness in autistic participants. We also replicated the finding that a greater proportion of autistic participants were unemployed relative to non-autistic participants. Collectively, this research highlights the importance of considering touch in research investigating employment, and its impact on loneliness and wellbeing, in autistic participants

Do Motion Controllers Make Action Video Games Less Sedentary? A Randomized Experiment

Sports- and fitness-themed video games using motion controllers have been found to produce physical activity. It is possible that motion controllers may also enhance energy expenditure when applied to more sedentary games such as action games. Young adults (N = 100) were randomized to play three games using either motion-based or traditional controllers. No main effect was found for controller or game pair (P > .12). An interaction was found such that in one pair, motion control (mean [SD] 0.96 [0.20] kcal · kg−1 · hr−1) produced 0.10 kcal · kg−1 · hr−1 (95% confidence interval 0.03 to 0.17) greater energy expenditure than traditional control (0.86 [0.17] kcal · kg−1 · hr−1, P = .048). All games were sedentary. As currently implemented, motion control is unlikely to produce moderate intensity physical activity in action games. However, some games produce small but significant increases in energy expenditure, which may benefit health by decreasing sedentary behavior

Theoretical and Behavioral Mediators of a Weight Loss Intervention for Men

Men are currently underrepresented in weight loss trials despite similar obesity rates, which limits our understanding about the most effective elements of treatment for men. The purpose of this study was to test the theoretical (autonomous motivation, self-efficacy, outcome expectancies, and self-regulation) and behavioral (calorie intake, physical activity, self-weighing) mediators of a men-only, Internet-delivered weight loss intervention focused on innovative and tailored treatment elements specifically for men

The Prevalence of Evidence-Based Substance Use Prevention Curricula in the Nation's Elementary Schools

Current guidelines for school-based substance use prevention suggest that prevention efforts should begin in elementary grades, before students begin using substances. Previous research suggests, however, that the use of evidence-based curricula in these grades may be low. Using a 2005 survey of public school districts in the U.S. that include elementary grades (n=1563), we assessed the prevalence of elementary curricula use, particularly those designated as evidence-based. We found that although 72% of districts administer a substance use prevention curriculum to their elementary students, only about 35% are using one that is evidence-based and only about 14% are using an evidence-based curriculum more so than any other prevention curriculum. We present prevalence estimates for specific evidence-based curricula and conclude by discussing possible reasons for and implications of our findings