Grey Parrot (Psittacus erithacus) numerical abilities: addition and further experiments on a zero-like concept

A Grey parrot (Psittacus erithacus), able to quantify 6 or fewer item sets (including heterogeneous subsets) by using English labels (I. M. Pepperberg, 1994), was tested on addition of quantities involving 0-6. He was, without explicit training, asked, "How many total X?" for 2 sequentially presented collections (e.g., of variously sized jelly beans or nuts) and required to answer with a vocal English number label. His accuracy suggested (a) that his addition abilities are comparable to those of nonhuman primates and young children, (b) some limits as to his correlation of "none" and the concept of zero, and (c) a possible counting-like strategy for the quantity 5.     

Do friends always help your studies? Mediating processes between social relations and academic motivation

Previous studies suggest that social relations can increase one’s motivation to learn in school. However, other evidence showed that having more friends may also distract from one’s academic involvement. To understand the mechanisms behind this apparent contradiction, this study identified and tested the effects of a potentially important positive and negative mediator between social relations and academic motivation. A total of 226 university students were used to test the hypothesized path model. Results showed that the impact of social relations on students’ academic motivation was negatively mediated by alcohol use, but positively mediated by their place attachment to the university, although the model fit differed for women and men. Implications for social relations, school policy and freshman orientation programs are discussed.     

Distinguishing Between the Facilitating and the Self-Serving Charismatic Group Leader

Winnicott informed us about the components of the facilitating environment. Kohut warned us to differentiate between the charismatic leader, who looks for enfeebled followers to further his own grandiose ambitions, and the idealizable leader whose actions are based on a sense of values. Findings from attachment theory and neurobiology indicate how specific developmental issues make for a perfect fit between the self-serving charismatic leader and those who have been deprived of attuned interactive regulation and secure attachment in early childhood. This article attempts to integrate the above ideas for application to group dynamics in therapeutic, supervisory, training, and institutional groups.     

Investigating ToM in aging with the MASC: from accuracy to error type

Growing evidence indicates that Theory of Mind (ToM) declines in normal aging. However, the majority of this research has used classic and static verbal tasks that present scenarios, which are very different from real life. The present study was designed to fill this gap by administering the Movie for the Assessment of Social Cognition (MASC) to young and older participants. It allows one to analyze not only the accuracy, but also the typology of error in mental states attribution distinguishing between iper-ToM (over-mentalization), ipo-ToM (insufficient mentalization), and no-ToM (lack of mentalization). We recruited 30 young (20–29 years), 39 young-old (65–74 years), and 31 old-old (75–86 years) participants. Along with the MASC, we administered a classic ToM task, the Strange Stories, and several measures of cognitive functioning. Results showed that older adults were less accurate in mental state attribution than young adults in the MASC, but not in the Strange Stories. In addition, compared to young adults, older adults committed more errors of both ipo- and no-ToM, while young adults committed more often iper-ToM errors. Additionally, older adults, but not young adults, did not show a difference between iper-ToM and ipo-ToM errors, which were equally frequent in this age group. Globally, results indicated that older adults’ failure in classic ToM tasks may be due to both ipo- and iper-ToM and provide needed evidence for the MASC as a suitable measure of ToM in aging.     

SINGLE-SEX VERSUS MIXED-SEX CLASSES AND GENDER SCHEMATA IN CHILDREN AND ADOLESCENTS

Positive effects for women and girls of all-female schools have been proposed, although there is relatively little clear empirical support for these beneficial results. Much of the cited research is based on elite all-female institutions or on parochial schools. This study takes advantage of the change of a private, nonparochial school from all girls to both sexes. Longitudinal data from grades 2 through 12 were collected over the course of the academic year to study the results of this transition. Stereotyping declined with age and over time in both types of class-rooms. Girls in single-sex classrooms showed some tendency to be more stereotyped in their perceptions of mixed-sex classrooms than did the girls who were actually in that setting. Thus, none of the measures showed any significant increase over time in stereotyping among girls in mixed-sex classes. Implications of these findings are discussed.