Grip morphology and hand use in chimpanzees (Pan troglodytes): evidence of a left hemisphere specialization in motor skill

Three experiments on grip morphology and hand use were conducted in a sample of chimpanzees. In Experiment 1, grip morphology when grasping food items was recorded, and it was found that subjects who adopted a precision grip were more right-handed than chimpanzees using other grips. In Experiment 2, the effect of food type on grasping was assessed. Smaller food items elicited significantly more precision grips for the right hand. In Experiment 3, error rates in grasping foods were compared between the left and right hands. Significantly more errors were made for the left compared with the right hand. The cumulative results indicate that chimpanzees show a left-hemisphere asymmetry in motor skill that is associated with the use of precision grips.     

Rigidity of thought and behavior: 100 years of research

Rigidity is one of the oldest psychological constructs, with systematic research dating back to the late 19th century. The authors review this research in an attempt to clarify the construct of rigidity and to investigate its correlates. Rigidity is described as a multidimensional construct encompassing the tendency to form and perseverate in the use of mental and behavioral sets. A series of meta-analyses was performed based on three measures of behavioral rigidity: the Einstellung Water-Jar Task, the Wisconsin Card Sorting Task, and the motor-cognitive dimension of the Test of Behavioral Rigidity. The results indicated that rigidity is curvilinearly related to age, positively related to authoritarianism (particularly under stressful situations), and negatively related to intelligence; that men are more rigid than women; that obsessive-compulsiveness is positively related to rigidity; and that schizophrenics are more rigid than nonschizophrenic siblings and normal controls. Unresolved issues and gaps in the research are discussed.     

Happiness is Flextime

We study how work a schedule flexibility (flextime) affects happiness. We use a US General Social Survey (GSS) pooled dataset containing the Quality of Worklife and Work Orientations modules for 1998, 2002, 2006, 2010, and 2014. We retain only respondents who are either full-time or part-time employees on payrolls. For flextime to be associated with greater happiness, it has to be more than just sometimes flexible or slight input into one’s work schedule, that is, little flextime does not increase happiness. But substantial flextime has a large effect on happiness–the size effect is about as large as that of household income, or about as large as a one-step increase in self-reported health, such as up from good to excellent health. Our findings provide support for both public and organizational policies that would promote greater work schedule flexibility or control for employees.     

“Revolving Doors and Brief Encounters: Dare We Do Inpatient Groups?” Reflections on Being an AGPA Conference Panelist

Participating as an American Group Psychotherapy Association (AGPA) conference panelist is an impactful and noteworthy experience. The purpose of this article is to discuss the experience in the context of providing a brief update to the conversation regarding rapid turnover in inpatient groups. We aim to highlight and summarize the far-reaching impact of ongoing clinical discussions and research found in both the literature and the conference experience. From an integrative perspective, clinical discussion between colleagues is an essential component in the discipline of psychology. It aids in appropriate edification as a clinical psychologist. Rather than emphasizing a one-size-fits-all therapeutic model, if we remain open to a diversity of approaches while clarifying and fine-tuning the most valuable commonalities, we will subsequently facilitate increased professional and patient satisfaction.     

Passion, Drama and Identity: Aidan Nichols on von Balthasar's Theodrama

Book reviewed in this article:
Aidan Nichols, No Bloodless Myth: A Guide Through Balthasar's Dramatics     

Temperament and its Relationship to Autistic Symptoms in a High-Risk Infant Sib Cohort

The present study prospectively investigated early temperamental profiles and their associations with autistic symptoms in high-risk infants (N = 138) with an older sibling with autistic spectrum disorder (ASD) and low-risk infants (N = 73) with no family history of ASD. Children who were diagnosed with ASD at 36 months were distinguished from non-ASD sibs and controls by a temperament profile marked by lower positive affect, higher negative affect and difficulty controlling attention and behavior, which we labeled Effortful Emotion Regulation. This profile also distinguished the non-ASD sib group from the control group. Children with ASD were distinguished from both of the other two groups by a temperament profile of low Behavioral Approach (lower sensitivity to “social” reward cues). Low levels of Behavioral Approach were associated with a higher number of ASD symptoms, even after taking into account IQ, sex and group membership. Finally, a cluster analysis revealed two ASD subgroups distinguished by number of ASD symptoms, IQ, age of diagnosis and scores on the Behavioral Approach profile. These findings suggest that temperament may be a useful framework for understanding the emergence of ASD early in life.     

I feel our pain: Antecedents and consequences of emotional self-stereotyping

According to Intergroup Emotions Theory people categorized as group members experience the emotions of their ingroup as a consequence of that membership. Four experiments showed that participants converged toward what they believed to be their specific ingroup’s distinct emotional experience when reporting emotions as group members, but not when reporting emotions as individuals. Such self-stereotyping of ingroup emotions occurred for an experimentally fabricated ingroup as well as a range of naturally occurring groups. Demonstrating the roots of this process in categorization, self-stereotyping was increased when motivations to affiliate were amplified and was moderated by ingroup identification. The adoption of ingroup emotions changed participants’ cognitive processing in a predictable way, demonstrating that emotional self-stereotyping involved the experience rather than merely the expression of group-based emotions. Self-stereotyping of ingroup emotions is thus one mechanism by which group-based emotions are shared and can be changed.     

Does binge eating play a role in the self-regulation of moods?

Self-reported emotional experiences and eating behaviors were studied in college students in an attempt to determine what types of emotional experiences precede and follow binge eating and how specific types of compensatory behaviors modify these experiences. First-year male and female students (N=390) were surveyed for depression, anxiety, health status, life satisfaction, and eating attitudes (EAT-26). Those reporting recurrent binge eating episodes were asked to describe their emotional feelings before and after bingeing and before and after compensatory activities. EAT-26 scores corresponding to scores previously reported for eating disordered patients were found in 9.7% of students. Binge eating was nearly twice as frequent among females (16.4%) as males (8.6%) Among females, positive relationships were found between specific EAT-26 factors scores and both anxiety and depression scores. The emotional antecedents and consequences of binge eating and of compensatory activities were compared in three sub-groups of individuals who reported recurrent bingeing with loss of self-control during binges. The three sub-groups consisted of individuals who reported, 1) bingeing without engaging in compensatory activities, 2) bingeing and compensating by means other than vomiting (fasting, exercising, or use of laxatives or diuretics), and 3) bingeing and compensating by vomiting. Regardless of the type of activity, those individuals who engaged in compensatory activities reported greater negative affect preceding binge episodes than those who did not compensate. In addition, contrary to expectations, negative affect did not decrease, but instead increased significantly, following binge episodes and decreased immediately before and after compensatory activities.