Species difference in the timing of gaze movement between chimpanzees and humans

How do humans and their closest relatives, chimpanzees, differ in their fundamental abilities for seeing the visual world? In this study, we directly compared the gaze movements of humans and the closest species, chimpanzees, using an eye-tracking system. During free viewing of a naturalistic scene, chimpanzees made more fixations per second (up to four) than did humans (up to three). This species difference was independent of the semantic variability of the presented scenes. The gap–overlap paradigm revealed that, rather than resulting from the sensitivity to the peripherally presented stimuli per se, the species difference reflected the particular strategy each species employed to solve the rivalry between central (fixated) and peripheral stimuli in their visual fields. Finally, when presented with a movie in which small images successively appeared/disappeared at random positions at the chosen presentation rate, chimpanzees tracked those images at the point of fixation for a longer time than did humans, outperforming humans in their speed of scanning. Our results suggest that chimpanzees and humans differ quantitatively in their visual strategies involving the timing of gaze movement. We discuss the functional reasons for each species’ employing such specific strategies.     

Some considerations about the biological appearance of pacing stimuli in visuomotor finger-tapping tasks

Sensorimotor synchronization is a crucial function for human daily activities, which relies on the ability of predicting external events. Synchronization performance, as assessed in finger-tapping (FT) tasks, is characterized by an anticipation tendency, as the tap generally precedes the pacing event. This synchronization error (SE) depends on many factors, in particular on the features of the pacing stimulus. Interest is growing in the facilitation effect that action observation has on motor execution. So far, neuroimaging and neurophysiology studies of motor priming via action observation have mainly employed tasks requiring single action instances. The impact of action observation on motor synchronization to periodic stimuli has not yet been tested; to this aim, a synchronization FT task may be an eligible probing task. The purpose of this study was to characterize a biological pacer at the behavioral level and provide information for those interested in studying the brain processes of continuous observation/execution coupling in timed actions using FT tasks. We evaluated the influence of the biological appearance of a pacer (a tapping finger) on SE, when compared to an abstract, kinematically equivalent pacer (a tilting hinged bar) and a more standard stimulus (a pulsating dot). We showed that the continuous visual display of a biological pacer yields comparable results to the abstract pacer, and a more robust performance and larger anticipations than a traditional pulsating stimulus.     

Trust in Nanotechnology? On Trust as Analytical Tool in Social Research on Emerging Technologies

Trust has become an important aspect of evaluating the relationship between lay public and technology implementation. Experiences have shown that a focus on trust provides a richer understanding of reasons for backlashes of technology in society than a mere focus of public understanding of risks and science communication. Therefore, trust is also widely used as a key concept for understanding and predicting trust or distrust in emerging technologies. But whereas trust broadens the scope for understanding established technologies with well-defined questions and controversies, it easily fails to do so with emerging technologies, where there are no shared questions, a lack of public familiarity with the technology in question, and a restricted understanding amongst social researchers as to where distrust is likely to arise and how and under which form the technology will actually be implemented. Rather contrary, ‘trust’ might sometimes even direct social research into fixed structures that makes it even more difficult for social research to provide socially robust knowledge. This article therefore suggests that if trust is to maintain its important role in evaluating emerging technologies, the approach has to be widened and initially focus not on people’s motivations for trust, but rather the object of trust it self, as to predicting how and where distrust might appear, how the object is established as an object of trust, and how it is established in relation with the public.     

?Psychische St?rung�� als Begr��ndung f��r staatliche Eingriffe in Grundrechte des Individuums

When dealing with ?old cases?? of preventive detention as well as retrospectively ordered preventive detention, a continuation of confinement should be possible if the offender involved suffers from a ??mental disorder?? which constitutes the danger of future serious violent or sexual crimes. In this psychiatric article it will be explained that the terms ??mental illness?? and also ??mental disorder?? must retain an empirical scientifically definable psychiatric content in order not to instigate deception. They must also be functionally defined in each judicial environment (police law, social law, civil law and criminal law) with respect to the capabilities of the individual which are impaired by the mental disorder. Such an approach could prevent a misuse of psychiatry for purely political security purposes.     

Coronary Intervention Improves Disease Specific Health-Related Quality of Life but Not Individualised Quality of Life: A Potential Response Shift Effect?

To explore potential response shift effects with different quality of life (QoL) instruments in cardiac patients undergoing coronary intervention. Study Design and Setting: Recalibration was assessed with the disease specific health-related quality of life (HRQL) instrument MacNew in combination with a then-test approach. Reconceptualisation and reprioritisation were assessed with the individualised QoL instrument SEIQoL-DW. Significant treatment effects were seen on the MacNew (global Δ: 0.6 ± 1.1, p = 0.004) but not on the SEIQoL-DW (Δ: 3.3 ± 16, p = 0.37) 6 months after coronary intervention. No recalibration effect was found on the MacNew then-test, while with the SEIQOL-DW potential response shift effects of reconceptualisation and reprioritisation were seen. For the first time response shift effects were explored in cardiac patients undergoing coronary intervention. This study confirmed that there is a clinically significant improvement in disease specific HRQL over time following successful coronary interventions. However, no treatment effect was seen for individualised QoL with the SEIQoL-DW. This might be due to reconceptualisation and reprioritisation response effects. Future studies need to focus on exploring response shift effects, and the interrelationship between its different components, captured by different patient reported outcome instruments in larger patient groups undergoing coronary interventions.     

Bilingual Therapeutics: Integrating the Complementary Perspectives and Practices of Motivational Interviewing and Dialectical Behavior Therapy

Informed by the practice of code-switching or style-switching in linguistics, “bilingual therapeutics” is proposed as the complementary integration of two evidence-based practices in psychotherapy: motivational interviewing (MI) and dialectical behavior therapy (DBT). Unique features of MI and DBT are presented, current research of each practice is reviewed, and their similarities and distinctions are discussed. It is proposed that fluency in both “languages” of MI and DBT may usher in a new therapeutic perspective to enhance client case conceptualization, illuminate subtleties of the therapeutic process, and foster more intentional and deliberate practitioners. Specifically, MI and DBT code-switching may help recruit and retain clients in formal treatment (e.g.,”speaking” MI more prominently to prepare clients for 12-month standard DBT) and promote consultation among therapists. The complementary integration of MI and DBT also suggests the emergence of a linguistic “third space,” including “spirit as synthesis” and “improvisational dance.”     

Panorama

Panorama

Panorama     

Temporal binding, binocular rivalry, and consciousness.

Cognitive functions like perception, memory, language, or consciousness are based on highly parallel and distributed information processing by the brain. One of the major unresolved questions is how information can be integrated and how coherent representational states can be established in the distributed neuronal systems subserving these functions. It has been suggested that this so-called "binding problem" may be solved in the temporal domain. The hypothesis is that synchronization of neuronal discharges can serve for the integration of distributed neurons into cell assemblies and that this process may underlie the selection of perceptually and behaviorally relevant information. As we intend to show here, this temporal binding hypothesis has implications for the search of the neural correlate of consciousness. We review experimental results, mainly obtained in the visual system, which support the notion of temporal binding. In particular, we discuss recent experiments on the neural mechanisms of binocular rivalry which suggest that appropriate synchronization among cortical neurons may be one of the necessary conditions for the buildup of perceptual states and awareness of sensory stimuli.     

Towards a New Epistemology of Mathematics

In this introduction we discuss the motivation behind the workshop “Towards a New Epistemology of Mathematics” of which this special issue constitutes the proceedings. We elaborate on historical and empirical aspects of the desired new epistemology, connect it to the public image of mathematics, and give a summary and an introduction to the contributions to this issue.

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The earliest electrophysiological correlate of visual awareness?

To examine the neural correlates and timing of human visual awareness, we recorded event-related potentials (ERPs) in two experiments while the observers were detecting a grey dot that was presented near subjective threshold. ERPs were averaged for conscious detections of the stimulus (hits) and nondetections (misses) separately. Our results revealed that hits, as compared to misses, showed a negativity around 180-350 ms at occipital and posterior temporal sites. It was followed by a positive wave after 400-500 ms, peaking at parietal sites. These correlates were not affected by a manipulation of attention. The early negativity, called 'visual awareness negativity' (VAN), may be a general, primary electrophysiological correlate of visual awareness. The present data show that it can be observed in response to appearance of a stimulus in visual awareness and that it generalizes across different manipulations of stimulus visibility.