Shielding voices: The modulation of binding processes between voice features and response features by task representations

Vocal events offer not only semantic-linguistic content but also information about the identity and the emotional-motivational state of the speaker. Furthermore, most vocal events have implications for our actions and therefore include action-related features. But the relevance and irrelevance of vocal features varies from task to task. The present study investigates binding processes for perceptual and action-related features of spoken words and their modulation by the task representation of the listener. Participants reacted with two response keys to eight different words spoken by a male or a female voice (Experiment 1) or spoken by an angry or neutral male voice (Experiment 2). There were two instruction conditions: half of participants learned eight stimulus-response mappings by rote (SR), and half of participants applied a binary task rule (TR). In both experiments, SR instructed participants showed clear evidence for binding processes between voice and response features indicated by an interaction between the irrelevant voice feature and the response. By contrast, as indicated by a three-way interaction with instruction, no such binding was found in the TR instructed group. These results are suggestive of binding and shielding as two adaptive mechanisms that ensure successful communication and action in a dynamic social environment.     

A Problem with Discretizing Vale–Maurelli in Simulation Studies

Psychometrika - Previous influential simulation studies investigate the effect of underlying non-normality in ordinal data using the Vale–Maurelli (VM) simulation method. We show that...     

Declarative memory consolidation: mechanisms acting during human sleep

Of late, an increasing number of studies have shown a strong relationship between sleep and memory. Here we summarize a series of our own studies in humans supporting a beneficial influence of slow-wave sleep (SWS) on declarative memory formation, and try to identify some mechanisms that might underlie this influence. Specifically, these experiments show that declarative memory benefits mainly from sleep periods dominated by SWS, whereas there is no consistent benefit of this memory from periods rich in rapid eye movement (REM) sleep. A main mechanism of declarative memory formation is believed to be the reactivation of newly acquired memory representations in hippocampal networks that stimulates a transfer and integration of these representations into neocortical neuronal networks. Consistent with this model, spindle activity and slow oscillation-related EEG coherence increase during early sleep after intense declarative learning in humans, signs that together point toward a neocortical reprocessing of the learned material. In addition, sleep seems to provide an optimal milieu for declarative memory reprocessing and consolidation by reducing cholinergic activation and the cortisol feedback to the hippocampus during SWS.     

Tangible pictures: viewpoint effects and linear perspective in visually impaired people

Perception of raised-line pictures in blindfolded-sighted, congenitally blind, late-blind, and low-vision subjects was studied in a series of experiments. The major aim of the study was to examine the value of perspective drawings for haptic pictures and visually impaired individuals. In experiment 1, subjects felt two wooden boards joined at 45 degrees, 90 degrees, or 135 degrees, and were instructed to pick the correct perspective drawing from among four choices. The first experiment on perspective found a significant effect of visual status, with much higher performance by the low-vision subjects. Mean performance for the congenitally blind subjects was not significantly different from that of the late-blind and blindfolded-sighted subjects. In a further experiment, blindfolded subjects drew tangible pictures of three-dimensional (3-D) geometric solids, and then engaged in a matching task. Counter to expectations, performance was not impaired for the 3-D drawings as compared with the frontal viewpoints. Subjects were also especially fast and more accurate when matching top views. Experiment 5 showed that top views were easiest for all of the visually impaired subjects, including those who were congenitally blind. Experiment 5 yielded higher performance for 3-D than frontal viewpoints. The results of all of the experiments were consistent with the idea that visual experience is not necessary for understanding perspective drawings of geometrical objects.     

The externalist challenge to conceptual engineering

Unlike conceptual analysis, conceptual engineering does not aim to identify the content that our current concepts do have, but the content which these concepts should have. For this method to show the results that its practitioners typically aim for, being able to change meanings seems to be a crucial presupposition. However, certain branches of semantic externalism raise doubts about whether this presupposition can be met. To the extent that meanings are determined by external factors such as causal histories or microphysical structures, it seems that they cannot be changed intentionally. This paper gives an extended discussion of this ‘externalist challenge’. Pace Herman Cappelen’s recent take on this issue, it argues that the viability of conceptual engineering crucially depends on our ability to bring about meaning change. Furthermore, it argues that, contrary to first appearance, causal theories of reference do allow for a sufficient degree of meaning control. To this purpose, it argues that there is a sense of what is called ‘collective long-range control’, and that popular versions of the causal theory of reference imply that people have this kind of control over meanings.

     

Visual attention: of features and transparent surfaces

A recent report by Wannig et al. demonstrated the effects of selectively attending to individual surfaces in transparent motion patterns on neurons in the middle temporal area of awake, behaving monkeys. The study illustrates a highly adaptive and flexible attentional modulation of sensory responses.     

Die Psychotherapieausbildung aus Sicht der Lehrkräfte

Background

A survey was carried out to ask the trainers and supervisors about their appraisal of the quality of the psychotherapy training and about ways to improve it 10 years after the inception of the “German psychotherapy law”.

Methods

Training institutes provided e-mail addresses and other contact information from over 5,000 trainers. The questioning was carried out mainly by on-line questionnaires and 2,196 data sets were used for analysis.

Results

Trainers showed overall satisfaction with the components of psychotherapy training and the skills of the training candidates. More knowledge transfer in the fields of therapy techniques and case studies and more cooperation with other professional groups were suggested. Trainers acknowledged redundancies between professional training and university studies and observed a heterogeneity of trainees, however, these were mostly considered helpful. Only half of the trainers were subject to evaluation of their work.

Conclusions

The quality of psychotherapy training could be improved by stronger emphasis on practical knowledge. Structural changes should be made to take the problem of redundancies and heterogeneities into account. Regular and continuous evaluation of the training should become an integral part of professional training and the results should have consequences.     

Characteristics and organization of the worst moment of trauma memories in posttraumatic stress disorder

It has been proposed that the organization of the worst moment in traumatic memories (“hotspots”) is of particular importance for the development of PTSD. However, current knowledge regarding the organization and content of worst moments is incomplete.In the present study, trauma survivors with (n = 25) and without PTSD (n = 54) were asked to indicate the worst moment of their trauma and to give a detailed narrative of the traumatic event. The worst moment and the remaining narrative were analyzed separately with regard to organization and emotional content.Results indicated that worst moments of trauma survivors with PTSD differed from the remaining narrative and from worst moments described by trauma survivors without PTSD in that they were characterized by more unfinished thoughts, more use of the present tense and lower levels of cognitive processing. However, hypotheses regarding differentiating emotional content were not supported. Implications for our theoretical understanding of PTSD and potential therapeutic interventions are discussed.