Enhanced perceptual priming for neutral stimuli in a traumatic context: A pathway to intrusive memories?

Clinical observations suggest that re-experiencing symptoms are triggered by stimuli that are perceptually similar to those present shortly before the trauma or its worst moments. Two experiments investigated the possible role of perceptual priming in this phenomenon. Volunteers (N = 28, N = 62) watched a series of “traumatic” and neutral picture stories, and completed blurred object identification (priming) and recognition memory tasks. Neutral objects that immediately preceded the “traumatic” stories were more strongly primed, but not better recognised, than objects from neutral stories. Enhanced priming predicted subsequent re-experiencing symptoms. The results support the role of perceptual priming in re-experiencing.     

Using stressful films to analyze risk factors for PTSD in analogue experimental studies – which film works best?

Abstract

To understand mental disorders, analogue paradigms provide an indispensable contribution. In posttraumatic stress disorder (PTSD), the stressful film paradigm is a frequently used analogue approach: Films depicting traumatic events are shown to non-clinical participants in order to elicit stress responses analogue to responses to traumatic events in real life. Previous studies used a large variety of films, which is problematic with regard to the comparability of results. The main goal of this study was to identify a film clip that (a) consistently provokes stress reactions and (b) provokes reactions that are as similar as possible to traumatic stress.

We randomly exposed 105 male and female participants to one of four stressful films, differing, e.g., in content and origin. Intrusive memories of the film, reported immediately after the film and during a diary phase of three days, as well as distress, heart rate, and several mood states were measured. A film clip depicting rape elicited the most consistent reactions that were characterized by a higher heart rate, more distress and more intrusive memories, compared to the other three clips. Intrusive memories across all films were especially related to an increase in heart rate and disgust in response to the film.     

The Use of Audio Guides to Collect Individualized Timing and Tracking Data in a Science Center Exhibition

ABSTRACT

Timing and tracking is a common method used to collect data about visitor behavior in exhibitions. Typically, it involves the unobtrusive observation of visitors. The purpose of this article is to present an alternative method for automated timing and tracking using an audio guide system. In the first part of the article, existing timing and tracking methods are reviewed to reveal their advantages and limitations. Against this background, the requirements of an alternative method for tracking large numbers of visitors in an interactive science center are discussed. Audio guides, which are commonly used in museum exhibitions, are used to track the movement of single visitors. In the second part of the article, the use of this method is illustrated in the context of a study on the orientation and choice behavior of visitor groups in an exhibition on biotechnology, molecular biology, and genetics. In conclusion, the benefits and limitations of our approach are discussed.     

What various kinds of errors tell us about lateral masking effects

Error analyses were conducted to study processes underlying lateral masking effects. Location errors (i.e., confusions with a flanking letter) occurred at a rate higher than chance, and they increased with increasing eccentricity and with decreasing spacing. In longer strings, confusions with a flanker directly adjacent to the target (which is itself laterally masked) were more frequent than with a far flanker, and these confusions also increased with increasing eccentricity and with decreasing spacing indicating that identification of the letter's form is not necessarily disturbed by adjacent characters. This was confirmed in a whole report task, where there was better recognition performance for the central letter than in partial report. Whereas in partial report, the left flanker was more often confused with the target than the right one, in whole report, the left-most letter was recognized best. The data provide evidence that positional uncertainty contributes to lateral masking effects, and that a substantial portion of positional uncertainty occurs after having identified the letter's forms.     

Human Decisions in Moral Dilemmas are Largely Described by Utilitarianism: Virtual Car Driving Study Provides Guidelines for Autonomous Driving Vehicles

Science and Engineering Ethics - Ethical thought experiments such as the trolley dilemma have been investigated extensively in the past, showing that humans act in utilitarian ways, trying to cause...     

Addressing the spiritual domain in a plural society: what is the best mode of integrating spiritual care into healthcare?

This study aims to rethink the integration of spiritual care into healthcare in spiritually plural societies. Based on a systematic review of the theoretical literature, we analysed 74 studies and distinguish four positions regarding the integration of spiritual care into healthcare: generalist-particularists who see the spiritual domain as a field to be addressed by all professional caregivers and in which caregivers’ own spiritual orientations play a vital role; generalist-universalists who advocate for all caregivers to provide spiritual care regardless of their spiritual orientations; specialist-particularists who argue that experts should address the spiritual domain in light of their own spiritual orientations; and specialist-universalists who call for experts to provide spiritual care regardless of their spiritual orientations. We argue that these four positions give different weight to the professional, personal, and confessional roles of the spiritual caregiver. Acknowledging these positions is a prerequisite for future scenarios of integrating spiritual care into healthcare.     

Lecturer dress code and student perceptions of lecturer professional attributes

This study explored how students’ perceptions of their lecturers’ dress code influenced their inferences about the professional competences of the lecturers. Survey respondents were 102 students from a South African university of technology (female = 60%; age range = 18 to 25 years, SD: Image 1 = 0.75; Image 2 = 0.60; Image 3 = 0.83 and Image 4 = 0.67). They responded to a structured survey with picture illustration figures of alternative dress code and across dimensions of professional competences: rapport, fairness, knowledge and credibility, and organisation and preparation. The findings suggest that lecturers’ dress code does influence students perceptions of lecturers’ qualities in the academic work environment. Results showed that students percieve both male and female professionally dressed lecturers more positively than casually dressed lecturers. Furthermore, instructor attire did not affect female and male students differently.     

Extracting global and local dynamics from the stochastics of rhythmic forearm movements

The authors examined the dynamics governing rhythmic forearm movements that 9 participants performed under a variety of task constraints by using a generic, unbiased analysis technique for extracting the drift coefficients of Fokker-Planck equations from stochastic data. From those coefficients, they reconstructed and analyzed vector fields and phase portraits to identify characteristic, task-dependent kinematic and dynamical features. They first directly estimated the parameters of weakly nonlinear self-sustaining oscillators from the extracted drift coefficients. The estimated parameters that the authors had selected instinctively and then particularized by using averaging methods largely confirmed previously derived limit-cycle models. Next, they ventured beyond limit-cycle models to examine global and local dynamical features that those models cannot adequately address, particularly task-dependent changes in flow strength and curvature and distinct dynamical features associated with flexion and extension. The authors argue that those features should be focal points of researchers' future modeling efforts to formulate a more adequate and encompassing account of the dynamics of rhythmic movement.     

Sind Körperpsychotherapeuten anders?

Following the “Generic Model of Psychotherapy” differences of treatment models are relevant with respect to optimal matching with patient's illness experience.Therefore it seems necessary to work out differences and similarities of treatment models.The results of 91 therapists, trained in Concentrative Movement Therapy (KBT), in the “Development of Psychotherapist Common Core Questionnaire (DPCCQ)” are compared to the therapists' results in other DPCCQ-studies, to find out,wether there are differences in therapeutic self concepts (theoretical orientation, therapeutic goals and attitudes). A few special features for KBT-therapists can be found which reflect characteristic aspects of the method.Despite some differences concerning socio-demographic characteristics (sex, age and basic professional education) similarities to other therapists predominate.     

Correlations between intelligence and components of serial timing variability

Psychometric intelligence correlates with reaction time in elementary cognitive tasks, as well as with performance in time discrimination and judgment tasks. It has remained unclear, however, to what extent these correlations are due to top–down mechanisms, such as attention, and bottom–up mechanisms, i.e. basic neural properties that influence both temporal accuracy and cognitive processes. Here, we assessed correlations between intelligence (Raven SPM Plus) and performance in isochronous serial interval production, a simple, automatic timing task where participants first make movements in synchrony with an isochronous sequence of sounds and then continue with self-paced production to produce a sequence of intervals with the same inter-onset interval (IOI). The target IOI varied across trials. A number of different measures of timing variability were considered, all negatively correlated with intelligence. Across all stimulus IOIs, local interval-to-interval variability correlated more strongly with intelligence than drift, i.e. gradual changes in response IOI. The strongest correlations with intelligence were found for IOIs between 400 and 900 ms, rather than above 1 s, which is typically considered a lower limit for cognitive timing. Furthermore, poor trials, i.e. trials arguably most affected by lapses in attention, did not predict intelligence better than the most accurate trials. We discuss these results in relation to the human timing literature, and argue that they support a bottom–up model of the relation between temporal variability of neural activity and intelligence.