Hand effects on mentally simulated reaching

Within the area of simulated (imagined) versus actual movement research, investigators have discovered that mentally simulated movements, like real actions, are controlled primarily by the hemispheres contralateral to the simulated limb. Furthermore, evidence points to a left-brain advantage for accuracy of simulated movements. With this information it could be suggested that, compared to left-handers, most right-handers would have an advantage. To test this hypothesis, strong right- and left-handers were compared on judgments of perceived reachability to visual targets lasting 150 ms in multiple locations of midline, right- and left-visual field (RVF/LVF). In reference to within group responses, we found no hemispheric or hand use advantage for right-handers. Although left-handers revealed no hemispheric advantage, there was a significant hand effect, favoring the non-dominant limb, most notably in LVF. This finding is explained in regard to a possible interference effect for left-handers, not shown for right-handers. Overall, left-handers displayed significantly more errors across hemispace. Therefore, it appears that when comparing hand groups, a left-hemisphere advantage favoring right-handers is plausible.     

A field experiment in interpersonal persuasion using authoritative influence

Thinking that they were simply being interviewed as participants in a public opinion survey, a portion of a cross-sectional adult sample of 1,275 persons were unwitting subjects of an experiment in interpersonal persuasion After committing themselves on the question how the legal machinery should deal with a specific case of a juvenile lawbreaker, subjects were given an argument presented as the view of an expert and contrary to their own It was hypothesized that subjects scoring higher on a scale measuring authoritarianism would more commonly change their opinion in the advocated direction than would those scoring lower The hypothesis received substantial confirmation Two secondary hypotheses also were sustained. These were (a) that persons assigning the locus of causality of juvenile delinquency to the individual himself rather than to circumstances beyond his control would have higher scores on authoritarianism than persons assigning causality to these latter conditions, and (b) that persons scoring higher in authoritarianism would initially more commonly recommend a harsher treatment of the delinquent than would those scoring lower in this trait     

Effect of observing response requirements to sample and comparison stimuli on the establishment of reject control (sample/S- relations)

The establishment of sample/S- relations (or reject control) during conditional discrimination training (AB, BC) affects transitivity (AC), equivalence (CA) and reflexivity (AA, BB, CC) test outcomes. The present study parametrically evaluated the effects of different observing patterns to comparison stimuli on the establishment of reject control during baseline conditional relation training. A matching-to-sample with observing requirements (MTS-OR) procedure was implemented during AB and BC conditional discrimination training. During training, the participants were required to observe the sample and incorrect comparison on every trial before responding. In addition, the participants were divided into three groups that differed regarding the percentage of training trials on which they were prevented from observing the correct comparison stimuli: 25%, 50%, and 75%. Once the mastery criteria were achieved during training, transitivity (AC), symmetry (BA, CB), equivalence (CA), and reflexivity (AA, BB, CC) tests were conducted with all comparison stimuli visible from the beginning. The results suggest that the number of errors during transitivity, equivalence, and reflexivity tests progressively increased as participants were prevented from observing the correct comparison on a greater number of trials during training. Symmetry test results, however, were not affected by the experimental manipulation. Moreover, the number of participants showing reject-control patterns during tests slightly increased and the number of participants showing select-control patterns decreased as a function of the number of trials on which the participants were prevented from observing the correct comparison. Thus, we suggest that observing patterns during training is a relevant variable that affects equivalence test outcomes.     

Time-dependent effects of treadmill exercise on aversive memory and cyclooxygenase pathway function

Exercise induces brain function adaptations and improves learning and memory; however the time window of exercise effects has been poorly investigated. Studies demonstrate an important role for cyclooxygenase-2 (COX-2) pathway function in the mechanisms underlying memory formation. The aim of present work was to investigate the effects of treadmill exercise on aversive memory and COX-2, PGE(2) and E-prostanoid receptors contents in the rat hippocampus at different time points after exercise has ended. Adult male Wistar rats were assigned to non-exercised (sedentary) and exercised (running daily for 20min, for 2weeks) groups. The inhibitory avoidance task was used to assess aversive memory and the COX-2, PGE(2) and E-prostanoid receptors (EP1, EP2, EP3 and EP4) levels were determined 1h, 18h, 3days or 7days after the last training session of treadmill exercise. The step down latency in the inhibitory avoidance, COX-2 and EP4 receptors levels were acutely increased by exercise, with a significant positive correlation between aversive memory performance and COX-2 levels. Increased EP2 content decreased PGE(2) levels were observed 7days after the last running session. The treadmill exercise protocol facilitates inhibitory avoidance memory and induces time-dependent changes on COX-2 pathways function (COX-2, PGE(2) and EP receptors).     

SHALL WE DANCE? MUSIC AS A PORT OF ENTRANCE TO MATERNAL–INFANT INTERSUBJECTIVITY IN A CONTEXT OF POSTNATAL DEPRESSION

The present study introduces the concept of a mother–infant group therapy that makes use of music, singing, and moving to establish maternal–infant intersubjectivity. It was conducted in a residential mother–baby unit for mothers with postnatal depression and their infants over a 5‐week period. Maternal–infant intersubjectivity of four dyads in relation to the group dynamics were microanalyzed for Sessions 1 and 5. We made within‐session (i.e., beginning–middle–end) and between‐session (Session 1 vs. Session 5) comparisons for the number of intersubjectivity moments (ISMs), total time of intersubjectivity (IST), and the mean duration of ISMs on a dyadic (i.e., own mother/infant involved) and a nondyadic level (i.e., own mother/infant not involved). In addition, three ISM levels (degree of group contribution) were distinguished. The results indicated a significant increase of ISMs/IST from Session 1 to Session 5. Within‐session analyses showed that ISMs/IST significantly decreased through Session 1 and remained stable throughout Session 5. Intersubjectivity occurred mainly on ISM Level 1 during Session 1 and on ISM Level 3 during Session 5, suggesting increased dyadic autonomy and self‐efficacy. The results are discussed in relation to the musical characteristics of mother–infant dyads, music improvisation techniques, group processes, and intersubjective development.     

The Influence of a Visually-Rich Surrounding Environment in Visuospatial Cognitive Performance: A Study with Adolescents

ABSTRACT

Adolescence is a developmental period characterized by a complex maturation process of various cognitive abilities. Cognitive control, which includes response inhibition and working memory, is one of them. A typical study on response inhibition to visual stimuli presents distractors and targets on the same display (e.g., the computer screen). However, in most daily activities, the potential for distraction exists in the individuals’ surrounding environment. This study proposes an alternative experimental paradigm to investigate whether a high- vs. a low-load visual surrounding environment influences adolescents’ visuospatial performance. Sixty-four adolescents (aged 13–17 years) participated in two experimental sessions (one in a high-load and the other in a low-load visual surrounding environment) in which they responded to four visuospatial cognitive tasks (attention and memory). Overall, the results revealed lower performance when the tasks were performed in the high-load environment (e.g., fewer hits and correct responses, and more false alarms and errors). These results suggest that more attention should be devoted to the potential effect of the external environment in adolescents’ everyday activities. We discuss various areas to which these data might be of relevance and make suggestions for future directions of the proposed procedure.     

Psychoanalysis and Epistemology: The Interrelation Between Clinical Work,Culture and Metapsychology

The paradigmatic theory of modern epistemology holds psychoanalysis in its scientific statute. Even if there is no explicit epistemology in the Freudian writings, it is undeniable that the genesis of psychoanalysis has a rigorous dialetic between theorization and clinical observation. Metapsychology is an organized and consistent set of concepts, capable of explaining and coordinating the analytical experience. It is through metapsychology that clinical work encounters the possibility of universalization, while metapsychology finds the possibility of fulfillment in clinical work. Clinical experience also confirms the interrelation between psychopathology and culture. Modern times have brought about new versions for psychopathological symptoms, which, in turn, have special effects on the narcisistic personalities and the manifestations of anxiety, giving place to different neurotic configurations.     

Beyond the representation field

Abstract

This article outlines the importance of representation and several Freudian concepts such as Vorstellung, Trieb, and word and object representations. The author refers to the division of the analytical process into two main fields: the field of representation, and the field of the Real, which is characterized by impossibility. He then states that this field is the proper field of psychoanalysis. The author presents two clinical vignettes in an attempt to demonstrate the significance of the analytical act as a tool to deal with such extreme psychic situations.     

Contemporary Adolescence and the Crisis of Ideals

The end of the 20th century inaugurates the tele-techno-media dimension that gives place to subjective mutation of incalculable effects. These transformations crucially affect adolescents and youths, for this new dimension promotes a planetary enlargement of the non-family influences which act directly on idealness. Held between the illusionary temptation of the ideal-ego and the possibility of living the ego ideal, the adolescent suffers through the confrontation with this colossal identifying, fragmented and voracious mirror. The author then discusses what the psychoanalyst can do.