Seven tenths incorrect: heterogeneity and change in the waist-to-hip ratios of Playboy centerfold models and Miss America pageant winners

Drawing on an article by Singh (1993), many discussions of the evolutionary psychology of heterosexual male preferences have reported a remarkable consistency in the waist-to-hip ratios of Playboy centerfold models and Miss America pageant winners over time. We reexamine the measurement data on these American beauty icons and show that these reports are false in several ways. First, the variation in waist-to-hip ratios among these women is greater than reported. Second, the center of the distribution of waist-to-hip ratios is not 0.70, but less than this. Third, the average waist-to-hip ratio within both samples has changed over time in a manner that is statistically significant and can be regarded as mutually consistent. Taken together, the findings undermine some of the evidence given for the repeated suggestion that there is something special--evolutionarily hard-wired or otherwise--about a specific female waist-to-hip ratio of 0.70 as a preference of American heterosexual males.     

Examining the link between child maltreatment and delinquency for youth with emotional and behavioral disorders

This study examined service delivery and risk factors for 93 youth with emotional and behavioral disorders who were served by one jurisdiction's child welfare, juvenile justice, and special education agencies. The researchers collected data through an archival review of agency records. The article discusses findings as they relate to the link between maltreatment and delinquency for youth with emotional and behavioral disorders and includes recommendations for integrating early intervention efforts.     

Disordered Gambling among College Students: A Meta-Analytic Synthesis

The purpose of this study was to use a meta-analytic procedure to synthesize the rates of disordered gambling for college students that have been reported in the research literature. In order to identify all possible studies that met stringent inclusion criteria, Medline, PsychINFO, and SocioIndex databases were searched with the terms “gambling,” and “college student”. This process resulted in 15 studies concerning gambling among college students that were published through July 2005. To synthesize the 15 studies, a random effects model for meta-analysis was applied. The estimated proportion of disordered gamblers among college students was 7.89%. This estimate is noteworthy because it is higher than that reported for adolescents, college students or adults in a previous study using meta-analytic procedures with studies conducted prior to 1997.     

Mandatory reporting of childhood sexual abuse in Israel: what happens after the report?

While the professional literature deals to some degree with the difficult dilemmas faced by professionals regarding the question of reporting or not reporting child abuse as mandated by law, there is a glaring insufficiency of studies looking at the impact of reporting on the victims and their families. This paper presents six cases of suspected sexual abuse to demonstrate some of the inconsistency in responses to reports within the Israeli system. The authors recommend amendments to the Israeli mandatory reporting law so that the law is not only a societal decree of the absolute prohibition against the sexual exploitation of minors and others incapable of giving informed consent, but also a basis for consistent and skillful professional intervention.     

Marital Conflict Trajectories and Associations With Children's Disruptive Behavior

We seek to identify heterogeneous trajectories of marital conflict during the early childhood period, identify predictors associated with these trajectories, and examine associations between trajectory group membership and children's disruptive behavior. Participants were 469 families examined 4 times when the children were 2 to 54 months of age. Maternal reports of marital conflict, adverse childhood experiences, depressive symptoms, and sociodemographic characteristics were collected, and averaged maternal and paternal reports of child disruptive problems were used. Using growth mixture modeling, 3 trajectories of marital conflict were identified: high increasing (21.8%), high decreasing (7%), and low stable (71.2%). Maternal adverse childhood experiences predicted increased risk of belonging in the high‐increasing group, whereas depressive symptoms predicted increased risk of belonging in the high‐decreasing group. Importantly, children of mothers in the high‐increasing group exhibited higher levels of disruptive behavior at 54 months when compared with children of mothers in the high‐decreasing and low‐stable groups.     

Peer Exploitation: Findings from a Romanian National Representative Sample of Children Living in Long‐Term Residential Centres

This study emphasises different facets of peer exploitation awareness and experience identified in closed‐type institutions, including a couple of abusive behaviours that have not been previously identified in long‐term residential centres.

‘Emphasises different facets of peer exploitation awareness and experience identified in closed‐type institutions’

A national representative sample of 1391 children (743 boys and 648 girls) seven to 20 years of age living in 44 long‐term residential centres was analysed to identify the prevalence of awareness and experience of peer exploitation. Multilevel logistic regression models were used to identify the predictors of peer exploitation experience. In total, 40.1 per cent of children reported that they were aware of peer exploitation, and 28.5 per cent that they were victims of such exploitation. Additionally, it was shown that (a) children who reported past abuse by a staff member were more likely to be victims of exploitation than those who did not; and (b) an increased number of children in a dorm room predicted a decrease in the odds of peer exploitation experience. This study provides a picture of the developmental environment for children in Romanian orphanages in the late 1990s, prior to subsequent child protection reforms, and underlines the prevalence of exploitation and the risk factors for peer exploitation in closed institutional systems. Copyright © 2017 John Wiley & Sons, Ltd.

Key Practitioner Messages

• Four in ten (40%) institutionalised children reported that they were aware of at least one form of peer exploitation, and nearly three in ten (28.5%) reported experiencing at least some of these types of exploitation practices by their older peers.
• This study highlights the importance of understanding the complex milieu that comprised the daily lives of institutionalised children in Romania, including an environment that consisted of physical abuse by institution staff and awareness and experiences of exploitation.

     

Pubertal Timing as a Potential Mediator of Adoption Effects on Problem Behaviors

Adopted children show more problem behaviors than nonadopted children. Given that internationally adopted individuals show earlier puberty than nonadopted individuals, and early puberty is associated with problem behaviors in nonadopted youth, we analyzed data from adopted domestic adoptees to determine whether problem behaviors could be explained by differences in pubertal timing. Relative to nonadopted controls (n = 153), domestically adopted girls (n = 121) had earlier menarche, earlier sexual initiation, and more conduct disorder symptoms. Age at menarche partially mediated the relation of adoptive status to sexual initiation, but not to conduct disorder symptoms. Extending findings from international adoptees, results show that domestic adoption is also linked to earlier puberty, and suggest early puberty as one mechanism linking adoption to problematic outcomes.     

Report on matching procedures of a dual record system in the southern Philippines

There are generally three stages to the development of rules for matching vital events data from two sources covering the same population: (a) establishing a set of “true” matches and nonmatches; (b) determining the best tolerance limits for each single characteristic which might be used in matching; and (c) experimenting to determine the set or sets of characteristics and the weights to be used in classifying a pair of records as matched or nonmatched. Specific examples, based on early matching experiments with data from the dual record system of the Mindanao Center for Population Studies (MCPS), are presented. Successive application of different sets of characteristics (differential valence rule) to the remaining unmatched events produced an acceptable rule for matching in this study.     

On the Markov Equivalence of Chain Graphs, Undirected Graphs, and Acyclic Digraphs

Graphical Markov models use undirected graphs (UDGs), acyclic directed graphs (ADGs), or (mixed) chain graphs to represent possible dependencies among random variables in a multivariate distribution. Whereas a UDG is uniquely determined by its associated Markov model, this is not true for ADGs or for general chain graphs (which include both UDGs and ADGs as special cases). This paper addresses three questions regarding the equivalence of graphical Markov models: when is a given chain graph Markov equivalent (1) to some UDG? (2) to some (at least one) ADG? (3) to some decomposable UDG? The answers are obtained by means of an extension of Frydenberg’s (1990) elegant graph-theoretic characterization of the Markov equivalence of chain graphs.