Play and Social Interaction in Children Following Divorce

This paper presents the results of a longitudinal study of the effects of divorce on play and social interaction in children. Forty-eight middle class white preschool children from divorced families and a matched group of forty-eight non divorced families were studied at 2 months, 1 year and 2 years after divorce. In the first year following divorce disruptions were found in both play and social relations for boys and girls from divorced families. The adverse effects had largely disappeared for girls by two years after divorce; however, the effects were more intense and enduring for boys. The play patterns of children from divorced families, in comparison to those of children in non divorced families, were less socially and cognitively mature when measured shortly after divorce. Limitations and rigidity in fantasy play were particularly notable. In the year following divorce both boys and girls showed high rates of dependent helpseeking behavior and acting out, non-compliant behavior. This again was more enduring in boys than girls. Even when the behavior of boys from divorced families had improved they were viewed and responded to more negatively by peers and teachers than were children from non divorced families or girls from divorced families.     

Testing the equality of two normal percentiles

Two statistics are suggested for testing the equality of two normal percentiles where population means and variances are unknown. The first is based on the generalized likelihood ratio test (LRT), the second on Cochran's statistic used in the Behrens-Fisher problem. Size and power comparisons are made by using simulation and asympototic theory.     

Comparison of exercise attitudes and behaviors of urban older adults with AARP's national sample results

This study assessed perceptions about exercise among a convenience sample of low-income, urban, older adult patients at a publicly operated ambulatory primary-care clinic, and results were then compared with the findings of a national study. Although it was expected that the predominantly minority and economically disadvantaged participants in this study would trail significantly behind their White counterparts in their perceptions and behavior regarding exercise, findings demonstrated otherwise. Specifically, when physicians encourage moderate exercise, when patients believe that they can overcome barriers to exercise, and when the environment supports moderate exercise through the availability of community exercise classes, inequities in health behaviors can be reduced. Interventions designed to increase exercise for this population should be developed with an understanding of the many barriers that they will have to overcome, a focus on building confidence, and communicating the many benefits of this behavior.     

Job activities and personal crime victimization: Implications for theory

Theoreticians have used the concepts of lifestyle and routine activities to account for the occurrence of personal crime victimization. Research has not usually used direct measures of these concepts, however, instead relying on demographic variables such as age and sex as proxy indicators. This paper analyzes the relationship of various job activities (delivering passengers or goods, traveling out of town, dealing face-to-face with customers, and working irregular hours) to the risk of violent and theft-damage personal crime victimization, and to the risk of such victimization at work. Logistic regression models show that delivery of passengers or goods and dealing with the public are robustly associated with violent victimization. None of the four job activities are consistently associated with theft-damage victimization risk. The results illustrate the importance of using direct measures of life-style or routine activities to examine exposure to the risk of victimization. The findings also suggest the need to elaborate further the notion of exposure, and to develop a second generation of victimization theory.     

A Bayesian meta-analysis of infants’ ability to perceive audio–visual congruence for speech

This paper quantifies the extent to which infants can perceive audio–visual congruence for speech information and assesses whether this ability changes with native language exposure over time. A hierarchical Bayesian robust regression model of 92 separate effect sizes extracted from 24 studies indicates a moderate effect size in a positive direction (0.35, CI [0.21: 0.50]). This result suggests that infants possess a robust ability to detect audio–visual congruence for speech. Moderator analyses, moreover, suggest that infants’ audio–visual matching ability for speech emerges at an early point in the process of language acquisition and remains stable for both native and non-native speech throughout early development. A sensitivity analysis of the meta-analytic data, however, indicates that a moderate publication bias for significant results could shift the lower credible interval to include null effects. Based on these findings, we outline recommendations for new lines of enquiry and suggest ways to improve the replicability of results in future investigations.     

Everyday Race: Millennials,Generation Z,and the Census

The census is a central feature of U.S. governance, providing important information regarding the U.S. population used to determine legislative representation and the allocation of federal funding. The count also involves a measure of race and ethnicity, however the sociopolitical construction of race means census categories have shifted throughout history. Existing data highlight how current classifications do not fully capture the identities of different groups; however, less is known about the views of young adults. Utilizing interview and journal data wherein 84 college students from the Millennial and Generation Z cohorts were asked to reflect on the 2010 and 2020 census race questions, our findings reveal a major gap between census classification and everyday experiences with racial categorization. Our study provides meaningful insights into how young adults think about the census race and ethnicity categories, with implications for future research and census collection.     

Clocks and Trees: Isomorphic Dutch Auctions and Centipede Games

We report an experiment on effects of varying institutional format and dynamic structure of centipede games and Dutch auctions. Centipede games with a clock format unravel, as predicted by theory but not reported in previous literature on two‐player tree‐format centipede games. Dutch auctions with a tree format produce bids close to risk neutral Nash equilibrium bids, unlike previous literature on clock‐format Dutch auctions. Our data provide a new, expanded set of stylized facts which may provide a foundation for unified modeling of play in a class of games that includes centipede games and Dutch auctions.