Age and Sex Differences in the Cooperative and Noncooperative Behavior of Pairs of American Children

Game playing behavior of same and mixed sex pairs of 5-, 8-, and 11-year-old American children was compared, using a game in which cooperative behavior maximized reward. Pairs of 8- and 11-year-old children were relatively more cooperative and attained significantly more Joint Reward Goals than 5-year-old pairs. Older pairs were not maximally cooperative, however, in terms of all the dependent measures; in adjusting for initial differences on practice trials, 5-year-olds and 8-year-olds took less time than the 11-year-olds, and 11-year-old pairs of boys took significantly more time than all other pairs. In addition, cooperative behavior increased across trials, especially for the 11-year-old children.     

Intuitive Heuristics Linking Perfectionism, Control, and Beliefs Regarding Body Shape in Eating Disorders

A number of correlational studies have established a clear association between perfectionism, control and beliefs regarding body shape in eating disorders (EDs). The aim of this study is to test the effectiveness of the above- mentioned associations in exploring the presence of intuitive heuristics. Intuitive heuristics can be conceived as as mental shortcuts, cognitive processes that are highly susceptible to irrational biases. Forty one non clinical female controls and 27 in-patient females with an ED diagnosis participated in an experimental task that tested whether participants would show an intuitive rather than a logically based link between perfectionism in different domains (study, work, hygiene) and a thin body shape. In the healthy female participants the occurrence of proposed link was noted in the hygiene domain only, while ED participants showed this intuitive association in all the domains explored: study, work, and hygiene. The study confirms in clinical ED sample a wider employment of heuristics associating perfectionism and thinness that is based on purely intuitive irrational reasoning.     

Testing the hypothesized effect of dysgenic fertility on intelligence with existing reaction time data: A comment on Woodley,te Nijenhuis,and Murphy (2013)

Dysgenic fertility has supposedly resulted in a decline in general intelligence (g) over time. In light of evidence that simple visual reaction time (RT) is inversely related to IQ, Woodley et al. (2013) tested the hypothesized dysgenic effect by subjecting to a meta-regression simple visual RT data collected over 100 years in 15 studies. This analysis found that RT had significantly increased according to a linear function over this time period. Woodley et al. then used this result to estimate the rate at which g had declined over the same period. The present comment points out that there are large gaps in the distribution of RTs analyzed by Woodley et al. with respect to year tested, and that RT in males did not vary as a function of year in the 13 studies published from 1941 on. It is concluded that although existing data are consistent with the idea that g has been adversely affected by dysgenic fertility, it cannot be determined at what rate g has fallen over time.     

Repression and high anxiety are associated with aberrant diurnal cortisol rhythms in women with metastatic breast cancer.

Previous research has provided evidence of autonomic, endocrine, and immunological dysregulation in repressers and a possible association with cancer incidence and progression. Recently published data from the authors' laboratory demonstrated that flatter diurnal cortisol slopes were a risk factor for early mortality in women with metastatic breast cancer. In the current analysis of this same sample (N=91), the authors tested differences at baseline between groups scored using the Weinberger Adjustment Inventory on diurnal cortisol slope and mean cortisol levels. When compared with self-assured and nonextreme groups, the represser and high-anxious groups had a significantly flatter diurnal slope. Diurnal slope was similar for repressers and high-anxious groups. Groups did not differ on mean cortisol levels, nor did they differ on intercept (morning) values.     

Discrimination and categorization of emotional facial expressions and faces in Parkinson's disease

Our objective was to compare the ability to discriminate and categorize emotional facial expressions (EFEs) and facial identity characteristics (age and/or gender) in a group of 53 individuals with Parkinson's disease (PD) and another group of 53 healthy subjects. On the one hand, by means of discrimination and identification tasks, we compared two stages in the visual recognition process that could be selectively affected in individuals with PD. On the other hand, facial expression versus gender and age comparison permits us to contrast whether the emotional or non‐emotional content influences the configural perception of faces. In Experiment I, we did not find differences between groups, either with facial expression or age, in discrimination tasks. Conversely, in Experiment II, we found differences between the groups, but only in the EFE identification task. Taken together, our results indicate that configural perception of faces does not seem to be globally impaired in PD. However, this ability is selectively altered when the categorization of emotional faces is required. A deeper assessment of the PD group indicated that decline in facial expression categorization is more evident in a subgroup of patients with higher global impairment (motor and cognitive). Taken together, these results suggest that the problems found in facial expression recognition may be associated with the progressive neuronal loss in frontostriatal and mesolimbic circuits, which characterizes PD.     

Help Me Play! Parental Behaviors,Child Temperament,and Preschool Peer Play

Social competence is a critical developmental milestone for preschoolers. Because play is the primary activity through which preschoolers interact socially with peers, it serves as an excellent indicator of social competence. The development of social competence in preschoolers is complex and multifaceted. In order to capture this complexity, we used Belsky’s differential susceptibility hypothesis as a framework for examining the contributions of child temperament and parenting styles in the prediction of peer interactive play behaviors. Using parent ratings of a sample of 44 preschool-age children, we hypothesized that child temperament (specifically, reactivity and regulation) acts as a susceptibility factor in the relationship between parenting styles (authoritarian and authoritative) and child peer play behaviors (disruptive and interactive). Our findings indicated that child reactivity moderated the relationship between authoritarian parenting style and both play outcomes, suggesting that reactivity serves as a potential susceptibility factor. More specifically, children with high reactivity who had more authoritarian parents demonstrated higher levels of disruptive play and lower levels of interactive play. Regulation did not act as a susceptibility factor in our sample. Findings are discussed in terms of implications for practice and in terms of an approach that considers temperament (specifically reactivity) and parenting behaviors in preschool assessment and intervention efforts. Additionally, we discuss how our findings partially support the differential susceptibility hypothesis.