A comparative analysis of animals' understanding of the human pointing gesture

We review studies demonstrating the ability of some animals to understand the human pointing gesture. We present a 3-step analysis of the topic. (1) We compare and evaluate current experimental methods (2) We compare available experimental results on performance of different species and investigate the interaction of species differences and other independent variables (3) We evaluate how our present understanding of pointing comprehension answers questions about function, evolution and mechanisms. Recently, a number of different hypotheses have been put forward to account for the presence of this ability in some species and for the lack of such comprehension in others. In our view, there is no convincing evidence for the assumption that the competitive lifestyles of apes would inhibit the utilization of this human gesture. Similarly, domestication as a special evolutionary factor in the case of some species falls short in explaining high levels of pointing comprehension in some non-domestic species. We also disagree with the simplistic view of describing the phenomenon as a simple form of conditioning. We suggest that a more systematic comparative research is needed to understand the emerging communicative representational abilities in animals that provide the background for comprehending the human pointing gesture.     

Positive social-comparative feedback enhances motor learning in children

ObjectivesThe present study investigated the influence of social-comparative feedback on the learning of a throwing task in 10-year-old children.DesignTwo-group experimental design, including a practice phase and retention test.MethodBoth groups of participants, a positive social-comparative feedback and a control group, received veridical feedback about their performance (accuracy score) after each practice trial. In addition, after each block of 10 trials, the positive feedback group was given bogus feedback suggesting that their own performance was better than that of a peer group's on that block. One day after the practice phase, a retention test without (veridical or social-comparative) feedback was performed to assess learning effects as a function of feedback.ResultsThe positive feedback group demonstrated greater throwing accuracy than the control group on the retention test. In addition, questionnaire results indicated that this group scored higher in terms of perceived competence than the control group.ConclusionsThese findings demonstrate that feedback can have an important motivational function that affects the learning of motor skills in children.     

What gaze adds to arrows: Changes in attentional response to gaze versus arrows in childhood and adolescence

From early ages, gaze acts as a cue to infer the interests, behaviours, thoughts and emotions of social partners. Despite sharing attentional properties with other non-social directional stimuli, such as arrows, gaze produces unique effects. A spatial interference task revealed this dissociation. The direction of arrows was identified faster on congruent than on incongruent direction-location trials. Conversely, gaze produced a reversed congruency effect (RCE), with faster identifications on incongruent than congruent trials. To determine the emergence of these gaze-specific attentional mechanisms, 214 Spanish children (4–17 years) divided into 6 age groups, performed the aforementioned task across three experiments. Results showed stimulus-specific developmental trajectories. Whereas the standard effect of arrows was unaffected by age, gaze shifted from an arrow-like effect at age 4 to a gaze-specific RCE at age 12. The orienting mechanisms shared by gaze and arrows are already present in 4-year olds and, throughout childhood, gaze becomes a special social cue with additional attentional properties. Besides orienting attention to a direction, as arrows would do, gaze might orient attention towards a specific object that would be attentionally selected. Such additional components may not fully develop until adolescence. Understanding gaze-specific attentional mechanisms may be crucial for children with atypical socio-cognitive development.     

Changes in materialism,changes in psychological well-being: Evidence from three longitudinal studies and an intervention experiment

Few studies have examined how changes in materialism relate to changes in well-being; fewer have experimentally manipulated materialism to change well-being. Studies 1, 2, and 3 examined how changes in materialistic aspirations related to changes in well-being, using varying time frames (12 years, 2 years, and 6 months), samples (US young adults and Icelandic adults), and measures of materialism and well-being. Across all three studies, results supported the hypothesis that people’s well-being improves as they place relatively less importance on materialistic goals and values, whereas orienting toward materialistic goals relatively more is associated with decreases in well-being over time. Study 2 additionally demonstrated that this association was mediated by changes in psychological need satisfaction. A fourth, experimental study showed that highly materialistic US adolescents who received an intervention that decreased materialism also experienced increases in self-esteem over the next several months, relative to a control group. Thus, well-being changes as people change their relative focus on materialistic goals.     

Felicitas Publica and community well-being: nourishing relational goods through dialogic conversations between deprived and privileged populations

This article discusses the theoretical justifications, presumed relevance and value of using community interventions designed to be appreciative and strengths based, participatory and conversational, context sensitive and value driven, to promote well-being actions and coordinated meaning between privileged persons and those living in impoverished material and social conditions. It stresses the need for the field of positive psychology to incorporate new theoretical models, topics and participants, and to contribute actively to human relatedness and social justice. The authors endorse the significance of a “positive community psychology”, approaching collective well-being in terms of civil economy and Felicitas Publica, addressing innovative economic development while enabling conditions for positive relational goods. These interventions have the potential for resourceful and consequential change, where critical conscientisation is one of the vehicles. We recommend the use of a dialogic perspective coupled with affirmative language as transformational procedures, presupposing that social practices are inextricably bound up in discourse. To elucidate the ideas proposed in this article, we describe an intervention involving a Portuguese community in the Azores Islands, where the World Café method and the Appreciative inquiry principles were integrated and linked to a communication model emerging from the Coordinated Management of Meaning theory.     

Characteristics of Personal Networks Associated with Physical and Psychological Quality of Life Among Demobilized Individuals from the Colombian Armed Conflict

The study identifies relationships between the characteristics of personal networks of demobilized individuals and their quality of life, through the evaluation of a sample of 102 ex‐combatants from a demilitarized zone in Colombia's Caribbean coast. The data was processed using centrality values calculation and statistical analysis through the Pearson correlation coefficient. Results showed moderate levels of nodality, proximity and intermediation degrees regarding small, closed networks with an unsatisfied high demand for support resources. Quality of life showed medium performance levels, with inverse relationships between mental health (p = .009 < .05) and vitality (p = .011 < .05) and intermediation. Positive feedback related significantly to general health (p = .041 < .05), while negative interactions showed inverse relationships to physical functioning (p = .012 < .05), physical role (p = .005), mental health (p = .001 < .05), and emotional role (p = .009 < .05). In conclusion, among the highly cohesive personal networks, there were less observations of social support that fosters increased energy and psychological health, given that access to this support is limited to a small number of members of the personal network. Copyright © 2013 John Wiley & Sons, Ltd.     

Interactive effects of personality and separation as acculturation style on adolescent antisocial behaviour

The primary aim of this study was to assess the interaction between personality and acculturation variables in predicting antisocial behaviour among adolescent immigrants living in Spain. Previous studies have shown that the acculturation style referred to as separation (rejection of the host country's culture, and a strong desire to preserve the culture of the country of origin) was strongly related to antisocial behaviour among immigrants. A further aim of this study was to examine if the relationship between separation and antisocial behaviour was moderated by personality variables, in particular impulsivity, sensation-seeking, and personal competence. Self-reported data of a sample of 750 adolescent immigrants living in Galicia's and Madrid's regions (Spain) were gathered using previously validated scales. The results revealed that both separation and personality variables were significantly related to antisocial behaviour. Moreover, hierarchical regression analysis with the interaction terms entered found significant moderating effects i.e., the relationship between separation and antisocial behaviour was significantly amplified when impulsivity or sensation-seeking were high. The results underscore the need to examine the effects of personality, acculturation, and the interaction between both on antisocial behaviour among adolescent immigrants.     

Estructuras textuales y procesos de comprensión: un programa para instruir en la comprensión de textos

Resumen

El trabajo tiene la siguiente línea argumental: 1) Existe una relación entre las estructuras de los textos y los procesos de comprensión. 2) Los lectores con menor capacidad no se aprovechan de esas propiedades presentes en los textos y, como consecuencia, su representación del significado carece de orden y coherencia. 3) Si se instruye a los sujetos con una pobre capacidad de comprensión a detectar y usar las propiedades de los textos, puede reducirse la distancia que les separa de los sujetos con una buena capacidad de comprensión. Consecuentemente, el programa de instrucción está centrado en las actividades cognitivas que permiten seguir la progresión temática de los textos, extraer el significado global (aplicación de las macrorreglas de selección, generalización e integración) y a reconocer y usar las formas organizativas básicas. Para poner a prueba el programa de instrucción se contrastan los efectos de este programa con otro de carácter más tradicional y otra condición de control aplicando estas tres condiciones a sujetos de dos niveles de competencia, lo que da lugar a un diseño antes/después con dos niveles de competencia por tres tratamientos.     

Temperature dependence of the flow stress in Ir3Nb with the L12 structure

The effective s-d spin interaction is derived exactly for the one-impurity Anderson model via a unitary transformation. The unitary transformation has been calculated up to infinite order, thus an exact transformation was performed in the strict mathematical sense.     

Heidegger in America

Dismounting from the seesaw

Mind and World By John McDowell Harvard University Press, 1994. Pp. x + 191. £19.95.

Vagueness By Timothy Williamson Routledge, 1994. pp. xiii + 325 ISBN 0–415–03331–4. £35.00