Stiffness as a control variable in motor performance

In the experiments described in this article we investigated the control of stiffness of the effector system in relation to parameters of the movement. If the velocity of a movement is chosen, it appears that at the same time the stiffness of the effector system is set to a preferred value. By changing the instruction given to the subject it is possible to change the relationship between velocity and stiffness without changing the kinematic parameters of the movement.Finally, the changes of stiffness and velocity in a learning process are studied. In conformity with what might be expected on intuitive grounds, it is found that velocity increases spontaneously during learning while stiffness decreases. The results are discussed in connection with the generation of motor programmes.     

Construct and concurrent validity of the Cambridge neuropsychological automated tests in Portuguese older adults without neuropsychiatric diagnoses and with Alzheimer’s disease dementia

We aimed to analyze the construct and concurrent validity of the Rapid Visual Information Processing (RVP), Paired Associates Learning (PAL), Reaction Time (RTI), and Spatial Working Memory (SWM) tests from the Cambridge Neuropsychological Test Automated Battery (CANTAB®). Inclusion criteria were checked in a first session. The CANTAB and additional pencil-and-paper tests were administered within 1 week. The participants (aged 69–96 years) were 137 Portuguese adults without neuropsychiatric diagnoses and 37 adults with mild-to-moderate Alzheimer’s disease dementia. Comparisons were made between the CANTAB tests and between these tests and the Rey Complex Figure Test (RCFT), Verbal Fluency (VF) test, and some Wechsler Memory Scale-III and Wechsler Adult Intelligence Scale-III subtests. Most intra-test correlations were stronger than the CANTAB inter-test correlations. The RVP correlated more with VF animals (.44), the PAL with RCFT immediate recall (–.52), the RTI with RVP mean latency (.42), and the SWM with Spatial Span backward (–.39).     

Maintenance and Transformation of Problematic Self-Narratives: A Semiotic-Dialogical Approach

This study focuses on how the emergence of innovative moments (IMs), which are exceptions to a person’s dominant self-narrative (i.e., his or her usual way of understanding and experiencing), progresses to the construction of a new self-narrative. IMs challenge a person’s current framework of understanding and experiencing, generating uncertainty. When uncertainty is excessively threatening, a semiotic strategy to deal with it often emerges: attenuation of novelty’s meanings and implications by a quick return to the dominant self-narrative. From a dialogical perspective, a dominant voice (which organizes one’s current self-narrative) and a non-dominant or innovative voice (expressed during IMs) establish a cyclical relation, mutual in-feeding, blocking self-development. In this article, we analyze a successful psychotherapeutic case focusing on how the relation between dominant and non-dominant voices evolves from mutual in-feeding to other forms of dialogical relation. We have identified two processes: (1) escalation of the innovative voice(s) thereby inhibiting the dominant voice and (2) dominant and innovative voices negotiating and engaging in joint action.     

Understanding Extreme Violent Behavior in Ultra Firms: Exploring Identity Fusion from a Dialogical Perspective

This paper explores a dialogical operationalization of identity fusion in the context of football firms. An in-depth life story interview with a longstanding member of a football firm involved in several violent episodes was qualitatively analyzed. The variety of positions of the self (I-positions) as well as the dialogical relations established by such positions were examined under themes associated with identity fusion, in an attempt to understand pro-group radical violent behavior. Results suggest that a core coalition of internal I-positions and external We-positions favoring extreme ultra violence appeared to dominate the participant’s self-system. This coalition seemed to have soft boundaries among the positions compounding it and, at the same time, rigid boundaries with other positions of the self-system, operating as an I-prison, preventing alternative counter-violence voices to be heard and promoter or meta-positions to emerge. Considering that functionally equivalent forms of identity fusion have been identified in radical football violence and terrorism, this knowledge can contribute to tackle the pathways for engaging in extreme violence in favor of a group/organization. Moreover, it can be used to develop more effective programs to promote individuals’ de-fusion from different groups, whenever group adherence proves dysfunctional and risky for themselves and/or others.     

Maternal perinatal representations and their associations with mother–infant interaction and attachment: A longitudinal comparison of Portuguese and Brazilian dyads

Prior research in Western countries (mostly the US, Canada and northern Europe) indicates that mothers' representations are associated with mother–infant interaction quality and their child's attachment security later in the first year. Fewer studies, however, have evaluated whether these associations hold for mother–infant dyads in other countries, such as Brazil and Portugal. Although these countries share a similar language and culture, they differ on societal dimensions that may affect parenting attitudes and mother–infant relationships, such as economic stress, social organisation, social policy, and the availability of services for young families. In this longitudinal study, we followed two independent samples of Brazilian and Portuguese mother–infant dyads from the perinatal period to 12 months post-partum. We assessed mothers' perinatal representations using semi-structured interviews in the first 48 hours after the infant's birth, and evaluated the associations of these representations with mother interaction quality at 9 months and infant attachment at 12 months. Results were similar in each country, corroborating prior research in single Western countries: Mothers with more positive perinatal representations were more sensitive to their infants during free play at 9 months and were more likely to have infants classified as securely attached at 12 months.     

The effects of stimulus complexity on the preattentive processing of self-generated and nonself voices: An ERP study

The ability to differentiate one’s own voice from the voice of somebody else plays a critical role in successful verbal self-monitoring processes and in communication. However, most of the existing studies have only focused on the sensory correlates of self-generated voice processing, whereas the effects of attentional demands and stimulus complexity on self-generated voice processing remain largely unknown. In this study, we investigated the effects of stimulus complexity on the preattentive processing of self and nonself voice stimuli. Event-related potentials (ERPs) were recorded from 17 healthy males who watched a silent movie while ignoring prerecorded self-generated (SGV) and nonself (NSV) voice stimuli, consisting of a vocalization (vocalization category condition: VCC) or of a disyllabic word (word category condition: WCC). All voice stimuli were presented as standard and deviant events in four distinct oddball sequences. The mismatch negativity (MMN) ERP component peaked earlier for NSV than for SGV stimuli. Moreover, when compared with SGV stimuli, the P3a amplitude was increased for NSV stimuli in the VCC only, whereas in the WCC no significant differences were found between the two voice types. These findings suggest differences in the time course of automatic detection of a change in voice identity. In addition, they suggest that stimulus complexity modulates the magnitude of the orienting response to SGV and NSV stimuli, extending previous findings on self-voice processing.     

Are emotion regulation difficulties a moderator in the relationship between dating abuse and body investment in eating disorders?

IntroductionIt is well known that eating disorders (EDs) are related to intimacy difficulties and to previous adverse experiences; however, little is known about dating abuse and how this kind of abuse is related to the different facets of body investment and emotion regulation difficulties in EDs. This study aimed to evaluate the presence of dating abuse in ED outpatients and to evaluate the moderating role of difficulties in emotion regulation in the relationship between dating abuse and the different facets of body investment.MethodSixty-four ED outpatients (95.3% females; aged from 15 to 30 years) completed self-report measures regarding dating abuse, body investment, difficulties in emotion regulation, and ED symptoms.ResultsApproximately 89% of ED outpatients identified a current or past dating relationship. Of those, 51 (89.5%) reported at least one episode of dating abuse perpetration, and 52 (91.2%) reported at least one episode of dating abuse victimization. Emotional abuse was the most reported type of dating abuse. High levels of dating abuse were related to elevated body care in participants with more difficulties in emotion regulation. The remaining models, incorporating the other facets of body investment, did not show significant moderating effects.DiscussionA substantial number of ED outpatients reported dating abuse. Pending longitudinal replication, body care may be used as a strategy to deal with dating abuse in the absence of more adaptive emotion regulation strategies.     

Homing in rocky intertidal fish. Are Lipophrys pholis L. able to perform true navigation?

Although navigation is common in many animals, only a few perform true navigation, meaning that they have the ability to return to a given place by relying on indirect cues obtained at the release site (i.e., by relying on information from a “map and compass” mechanism). The common intertidal fish, Lipophrys pholis, is thought to have homing abilities through a mechanism that primarily makes use of familiar landmarks (i.e., piloting). Anecdotal reports that individuals return to their home pools after release at unfamiliar sites suggest that L. pholis might use cues collected at the release site to find their way back (i.e., they might use map and compass information). Using a completely artificial setup, we tested the homing abilities of L. pholis as a function of age, sex, and familiarity with the release site. The findings showed that motivation for homing is present only in the adult phase and is independent of sex and/or familiarity with the release site. Moreover, adults released at a completely unfamiliar place oriented themselves in a direction roughly similar to that of their home pools. The fact that L. pholis were tested in a complete artificial environment means that hydrodynamic cues can be excluded as playing a role in this process and restricts the candidate options (e.g., magnetic cues). The ability to perform navigation based on a “map and compass” mechanism raises many interesting questions about the learning process, once these individuals have restricted home ranges during their lives. In vertebrate navigation, the cues used during the navigation process are a question of debate, and L. pholis offers an outstanding model to test hypotheses and ultimately provide answers.     

Perversion and infancy and adolescence

Abstract

Studying the works of Freud and Lacan, the authors carried out research on perversion in childhood. Their work covered the perverse polymorphism of infantile sexuality and the perception of the anatomic difference between the sexes that leads the child to create sexual theories and fantasies. The phallic mother and the fetish are viewed as imaginary solutions directly related to the Oedipus and castration complexes. In perversion, a particular position is taken in relation to the Oedipus complex: a serious flaw occurs in the symbolization of the law, and the mechanisms of denial and disavowal take form. Sexuality requires a second “logical time,” separated from infancy by the latency period, in order to confirm (in action) that a fixed position of jouissance (enjoyment) has actually been established. This can only happen in a period after adolescent enhancement. The distinction between perverse traces and a perverse structure is made, taking into account the fact that, in the case of child analysis, the analyst should free the child from the family fantasy and help him/her to build his/her own fantasy.

Campos Santoro V. et al. Perversion und Kindheit und Adoleszenz.

Im Studium der Arbeiten von Freud und Lacan haben die Autoren Forschung über Perversion in der Kindheit gemacht. Die Studien behandeln den perversen Polymorphismus der infantilen Sexualität und die Wahrnehmung des anatomischen Unterschiedes zwischen den Geschlechtern, welche das Kind dazu führt, Sexual-Theorien und Phatasien zu schaffen.

Die phallische Mutter und der Fetisch werden als imaginäre Lösungen angesehen, die sich direkt auf den Ödipus- und Kastrations-Komplex beziehen. Bei der Perversion wird eine besondere Position in Bezug auf den Ödipus angenommen; ein ernsthafter Mangel tritt bei der Symbolisierung des Rechts auf; die Mechanismen der Verneinung und der Verleugnung bilden sich. Sexualität erfordert eine zweite “logische Zeit”, von der Kindheit durch die Latenz Periode getrennt, um (in der Handlung) zu bestätigen, daß eine fixierte Position der jouissance (Vergnügung) sich tatsächlich etabliert hat. Das kann sich nur in einer Periode nach der adoleszenten Verstärkung ereignen.

Es wird die Unterscheidung zwischen perversen Spuren und einer perversen Struktur gemacht, in Rechnung stellend, daß im Fall der Kinder-Analyse der Analytiker das Kind von der Familien-Phantasie befreien sollte und ihm/ihr helfen sollte, seine/ihre Phantasie auszubilden.

Campos Santoro V. Perversión e infancia y adolescencia.

Estudiando los trabajos de Freud y Lacan, los autores han investigado la perversión en la niñez. Los estudios cubren la sexualidad infantil perversa polimorfa y la percepción de la diferencia anatómica entre los sexos, que llevan al niño a crear teorías sexuales y fantasías.

La madre fálica y el fetiche son vistos como soluciones imaginarias relacionadas directamente con el complejo de Edipo y de castración. La perversión, toma una posición particular en relación al Edipo; un fallo importante tiene lugar en la simbolización de la ley; los mecanismos de negación y repudio toman forma. La sexualidad requiere un segundo “tiempo lógico” separado de la infancia por el periodo de latencia, para confirmar (en acto) que una posición fija de jouissance (goce) se ha establecido. Esto solo puede ocurrir en un periodo posterior a la intensificación adolescente.

La distinción entre las huellas perversas y la estructura perversa se ha hecho, teniendo en cuenta que, en el caso del análisis de niños, el analista debe librar al niño de la fantasía familiar y ayudar a el/ella a construir su propia fantasía.