Seasonal variation in pigeon body weight and delayed matching-to-sample performance

The weights of 5 pigeons with free access to food, monitored over 3 calendar years in the laboratory, were found to fluctuate with season. All pigeons were at their heaviest in the winter and were lightest in the summer. Five different pigeons performed a standard delayed matching-to-sample task for 44 weeks from January to November. Their weights were held at 85% of their summer free-feeding weights, making their predicted deprivation level higher in the winter relative to predicted winter free-feeding weights. Slopes of forgetting functions fit to weekly response totals for each pigeon were shallower in winter, showing an improvement in accuracy with longer delays. Thus, delayed matching-to-sample performance may have been affected by the practice of maintaining the pigeons at a constant body weight throughout the calendar year.     

Dreaming as a primordial state of the mind: The clinical relevance of structural faults in the body ego as revealed in dreaming1

Thetherapeuticactionofpsychoanalysis, attributedformanyyearstotheinterpretation of the repressed libido, has shifted its focus to object relationships. Some modern analysts maintain that the primary factor of psychic change is the new model of object relationship provided by analysis, and do not consider signifi cant the knowledge of episodes comprising implicit memories, whose irrecoverable nature is demonstrated by neuroscience. Nevertheless, the author proposes that the knowledge of specifi c archaic events, useless as their interpretation may be, offers a glimpse of the make‐up of the mind, contributing to the improvement of the empathy indispensable for inducing changes in the patient. Episodes linked to absolute narcissism, in the beginnings of the body ego, which do not appear either in associations or in transference, emerge in dreams. Neuroscience has made possible the understanding of aspects of dreaming capable of providing a glimpse of the genesis of the ego, whose development from the bodily phase of absolute narcissism to the psychic object phase can thus be traced. The unearthing of the genesis of primary structural faults in dreaming furnishes the analyst with an estimate of the possibilities for development of the ego, and this knowledge provides fi ne tuning capable of guiding the analyst's conduct. A clinical case illustrates how these phenomena occur, showing the intersubjective relationship as the silent primary generator of psychic changes, consolidated and developed secondarily by means of the analytical dialogue.     

Spatio-temporal constraints on upright children's coordination when hitting a moving target

To determine if the spatial and/or temporal context affected the coordination patterns of children under five in upright interceptive tasks, 3-year-olds hit a ball dropped from a ramp from five heights (1.5, 2, 2.5, 3, and 3.5 m) to control drop time. We studied the initiation time of hitting a ball with a cinematic analysis of the different joint movements (foot, knee, hip, shoulder, and hand). Two patterns of joint coordination were observed according to the rolling height of the ball: a de-synchronized pattern for heights of 2 m or above where the foot was the first to move and the hand the last, and a “synchronized” pattern, for the lowest height (1.5 m) where all joints started moving at the same time due to a strong temporal pressure. These two coordination patterns highlight a functional adaptation of body joints according to the spatio-temporal constraints among children from the age of three.     

The Relative Impacts of Sibling Relationships on Adolescent Body Perceptions

The sibling relationship is the longest relationship of the life course and has been found to influence youth adjustment (Dunn, 2002 Dunn, J. (2002). Sibling relationships. In P. K. Smith &; C. H. Hart (Eds.), Blackwell Handbook of Childhood Social Development (pp. 223–237). Malden, MA: Blackwell Publishing. [Google Scholar]). Given that adolescence is a time of increased body awareness, the authors examined the potential role of siblings’ body conceptions and sibling relationship quality on adolescent body conceptions. In a sample of 101 predominantly White, middle-class adolescent sibling dyads, the authors found that positive sibling relationship quality was associated with higher physical self-worth in adolescents, but that this differed by sibling gender and sibling physical self-worth. Alternatively, negative sibling relationship quality was associated with lower physical self-worth for adolescents, but differed based on birth order, sibling physical self-worth, and adolescent gender.     

The significance of psycho‐peristalsis and tears within the therapeutic relationship

This paper represents a heuristic study of the significance of involuntary, intuitive gut responses (psycho‐peristalsis) and tears within the therapeutic relationship. Autobiographical material and qualitative data were gathered from case‐notes and semi‐structured interviews with four client/co‐participants. Data on occurrences of psycho‐peristalsis and tears were collected from 92 clients seen within a six‐year period. Eleven elements of a ‘general constitutional structure of experience’ were identified. A central finding of the study concerns the gut's apparent ability to ‘pick up’, at an unconscious level, significant material that might otherwise have been overlooked. The research suggests some possible clues to the process of unconscious communication and healing, and adds an interesting psychological dimension to recent findings in the fields of neuroscience and cell biology which amount to the discovery of a ‘second brain’ in the walls of the small intestine. These phenomena are examined in the light of theoretical debates in counselling and psychotherapy.     

Montaigne: The Embodiment of Identity as Grounds for Toleration

Res Publica - One of the most important issues today is the conflict between identity groups. Can the concept of toleration provide resources for thinking about this? The standard definition of...     

The Cognitive Demands of Gait Retraining in Runners: An EEG Study

Abstract

High impact forces during running have been associated with tibial stress injuries. Previous research has demonstrated increasing step rate will decrease impact forces during running. However, no research has determined the cognitive demand of gait retraining. The primary purpose was to determine the cognitive demand and effectiveness of field-based gait retraining. We hypothesized that in-field gait retraining would alter running mechanics without increasing cognitive workload as measured by EEG following learning. Runners with a history of tibial injury completed a gait retraining protocol which included a baseline run, retraining phase, practice phase, and re-assessment following retraining protocol. Results demonstrated an increase in the theta, beta, and gamma power within prefrontal cortex during new learning and corresponding return to baseline following skill acquisition and changes across alpha, beta, gamma, mu, and theta in the motor cortex (p < .05). In the midline superior parietal cortex, spectral power was greater for theta activity during new learning with a corresponding alpha suppression. Overall, the results demonstrated the use of EEG as an effective tool to measure cognitive demand for implicit motor learning and the effectiveness of in-field gait retraining.     

Using auditory feedback in body weight training

Auditory feedback has been successfully used to enhance performance in several sports such as golf and dance. The current study used auditory feedback procedures (i.e., a clicker) to improve the performance of 3 students performing a handstand. Handstands are part of a discipline called body weight training, that uses only the weight of an individual's own body to gain strength and body control. A multiple baseline design across four components was used to evaluate the effectiveness of auditory feedback. The results showed that auditory feedback was effective. The students and the trainer were highly satisfied with the auditory feedback procedure. Implications for future research are discussed.