Overcoming spontaneous patterns of coordination during the acquisition of a complex balancing task.

Learning in complex tasks is usually conceived as the problem of mastering the multiple and redundant degrees of freedom of the system. To reduce control requirements, two different strategies are conceivable. The first one consists of a "freezing-freeing" process for most articular joints to reduce the number of active biomechanical degrees of freedom to be managed. The second strategy consists of introducing rigid couplings between the oscillators building the system. In this case, learning implies the dissolution of initial couplings and the emergence of new, more task-specific couplings. The goal of our study was to analyze the spontaneous coordination of beginners and its development in a complex balancing task on a stabilometer, and to examine the emergence of these two strategies. Our results showed that beginners were characterized by strong couplings between the joints of the lower limbs. During learning, new and more task-specific couplings emerged that reflected a new organization of the trunk and a decoupling of some joints of the lower limbs that were initially coupled during the first few trials.     

How to map the affective semantic space of scents

The investigation of the semantic space associated with subjective affective experiences or feelings linked to odour perception has recently emerged. Because of the specificity of the emotional effects of odours, the terms derived from traditional models of emotion are unlikely to optimally account for odour-associated feelings. In this study, sets of terms derived from two traditional models, basic emotions and valence by arousal by dominance dimensional emotions, were compared with a recently elaborated olfaction-specific set of terms (Geneva Emotion and Odour Scale; GEOS). Three main criteria were considered: (1) the feeling's intensity reported in response to odours; (2) the inter-rater agreement concerning the reported feelings; and (3) the power to discriminate feelings evoked by various odorous substances. The evidence strongly suggested that the set of terms proposed by GEOS outperformed the terms derived from the two classical models in measuring the subjective affective experience elicited by odours. These results are interpreted with respect to a good correspondence between the functions of olfaction and the meaning conveyed by GEOS terms.     

Affective dimensions of odor perception: a comparison between Swiss, British, and Singaporean populations

Do affective responses to odors vary as a function of culture? To address this question, we developed two self-report scales in the United Kingdom (Liverpool: LEOS) and in Singapore (city of Singapore: SEOS), following the same procedure as used in the past to develop the Geneva Emotion and Odor Scale (GEOS: Chrea, Grandjean, Delplanque et al., 2009). The final scales were obtained by a three-step reduction of an initial pool of 480 affective terms, retaining only the most relevant terms to describe odor-related subjective affective states and comprised of six (GEOS) or seven affective dimensions (LEOS and SEOS). These included dimensions that were common to the three cultures (Disgust, Happiness Well-being, Sensuality Desire, and Energy), common to the two European samples (Soothing Peacefulness), and dimensions that were culture specific (Sensory Pleasure in Geneva; Nostalgia and Hunger Thirst in Liverpool; Intellectual Stimulation, Spirituality, and Negative Feelings in Singapore). A comparative approach showed that the dimensional organization of odor-related affective terms in a given culture better explained data variability for that culture than data variability for the other cultures, thus highlighting the importance of culture-specific tools in the investigation of odor-related affect.     

Contemporary theories of 1/f noise in motor control

1/f noise has been discovered in a number of time series collected in psychological and behavioral experiments. This ubiquitous phenomenon has been ignored for a long time and classical models were not designed for accounting for these long-range correlations. The aim of this paper is to present and discuss contrasted theoretical perspectives on 1/f noise, in order to provide a comprehensive overview of current debates in this domain. In a first part, we propose a formal definition of the phenomenon of 1/f noise, and we present some commonly used methods for measuring long-range correlations in time series. In a second part, we develop a theoretical position that considers 1/f noise as the hallmark of system complexity. From this point of view, 1/f noise emerges from the coordination of the many elements that compose the system. In a third part, we present a theoretical counterpoint suggesting that 1/f noise could emerge from localized sources within the system. In conclusion, we try to draw some lines of reasoning for going beyond the opposition between these two approaches.     

Effect of environmental exposure to a maternally-learned odorant on anxiety-like behaviors at weaning in mice

Animal Cognition - Early sensory experience, such as exposure to maternal or other environmental factors, is considered to influence neurocognitive development and behaviors. In many species,...     

Mentalization-Based Interventions in Child Psychiatry and Youth Protection Services I: Objectives,Setting, General Principles and Strategies

ABSTRACT

Many of the children who receive services in child psychiatry or are in the care of Youth Protection Services present with complex, multiple and often severe problems. Classic psychodynamic psychotherapy seems to be of little benefit to them. The majority of these children tend to not use symbolic play as a means of expressing their intrapsychic conflicts or relational difficulties and they do not verbally communicate much with clinicians. They are more likely to display an imaginative poverty that translates into boredom, motor discharge, and an inability to use the material put at their disposal for therapeutic purposes. The systematic and rigorous observations of these children in Quebec revealed that the majority of them present with severe mentalizing difficulties. They often show attitudes and behaviors linked to the prementalizing modes of psychic functioning. This article presents a mentalization-based intervention adapted to these children’s difficulties. The objectives, adaptation of the work setting, and general principles underlying this intervention are discussed. In addition, general intervention strategies are also covered. These interventions are considered as preparatory work whose principal purpose is to enable children to benefit later on from psychodynamic psychotherapy. The authors also recommend specific intervention strategies adapted to children’s predominant mode of psychic functioning. The details of these strategies will be shared in a separate article.     

Clinical Assessment of Prementalizing Modes of Psychic Functioning in Children and Their Parents in the Context of Trauma

ABSTRACT

As psychoanalytic psychotherapy for children depends on their capacity to mentalize, it is essential to integrate this dimension in their psychological assessment. Mentalization refers to the capacity to identify and comprehend the mental states (feelings, thoughts and intentions) underlying and explaining one’s own behaviors and those of others. This vital ability, which develops during the first five or six years of life in the context of a secure parent-child attachment, is often impaired in children subjected to neglect and maltreatment. Based on rigorous and systematic clinical observations made in youth protection and child psychiatry services, the authors suggest that the children in these settings, along with their parents, frequently present a prementalizing mode of psychic functioning. Further, the authors propose operationalizing the teleological, psychic equivalence, and pretend modes as they might be observed in older children and their parents. To this end, they begin by identifying behaviors, attitudes, and relational patterns potentially linked to each of these modes within a theoretical framework. Next, they describe the characteristics of these children’s narratives, play, and artistic productions. Lastly, three clinical vignettes are used to illustrate how the prementalizing modes are manifested. The results of this clinical assessment can guide the choice of techniques to be used in child psychotherapy.