Better not to deal with two tasks at the same time when stressed? Acute psychosocial stress reduces task shielding in dual-task performance

A major control demand in successful dual-task performance is the task-specific separation of task-goal representations and of the related stimulus-response translation processes. In the present study, we investigated how these cognitive control processes of task shielding are affected by acute psychosocial stress. Fifty-six healthy participants were exposed to either an acute psychosocial stressor (the Trier Social Stress Test) or a standardized control situation prior to a dual task. Task shielding was assessed by analyzing the interference of Task 2 processing on prioritized Task 1 performance. Following successful stress induction, as indicated by increases in salivary α-amylase (sAA) and cortisol that reflect increases in sympathetic nervous system and hypothalamus-pituitary-adrenal (HPA) axis activity, respectively, stressed individuals displayed reduced task shielding relative to controls. This result was further substantiated by a correlation between treatment-related increase in cortisol, but not sAA, and between-task interference, suggesting a potential role of the HPA stress response for the development of the observed effects. As an additional finding, when the volunteers were categorized with regard to their action-state orientation, their orientation did not interact with stress but did reveal generally increased between-task interference, and thus inferior task shielding, for state-oriented as compared to action-oriented individuals.     

A stop-signal task for sheep: introduction and validation of a direct measure for the stop-signal reaction time

Huntington’s disease (HD) patients show reduced flexibility in inhibiting an already-started response. This can be quantified by the stop-signal task. The aim of this study was to develop and validate a sheep version of the stop-signal task that would be suitable for monitoring the progression of cognitive decline in a transgenic sheep model of HD. Using a semi-automated operant system, sheep were trained to perform in a two-choice discrimination task. In 22% of the trials, a stop-signal was presented. Upon the stop-signal presentation, the sheep had to inhibit their already-started response. The stopping behaviour was captured using an accelerometer mounted on the back of the sheep. This set-up provided a direct read-out of the individual stop-signal reaction time (SSRT). We also estimated the SSRT using the conventional approach of subtracting the stop-signal delay (i.e., time after which the stop-signal is presented) from the ranked reaction time during a trial without a stop-signal. We found that all sheep could inhibit an already-started response in 91% of the stop-trials. The directly measured SSRT (0.974 ± 0.04 s) was not significantly different from the estimated SSRT (0.938 ± 0.04 s). The sheep version of the stop-signal task adds to the repertoire of tests suitable for investigating both cognitive dysfunction and efficacy of therapeutic agents in sheep models of neurodegenerative disease such as HD, as well as neurological conditions such as attention deficit hyperactivity disorder.     

Nature against nurture: calcification in the right thalamus in a young man with anorexia nervosa and obsessive-compulsive personality disorder

This report describes the case of a young man with a large calcification in the right thalamus that was first diagnosed at 9 years of age. Case history reveals specific eating rituals and other obsessive-compulsive personality traits during the patient's childhood and adolescence, fulfilling diagnostic criteria of obsessive-compulsive personality disorder. After a critical life event the patient develops anorexia nervosa. We suggest that our case and further literature provide evidence for an involvement of specific thalamic structures, such as the dorsomedial nucleus, in the development of anorexia nervosa. Furthermore, the treatment of the patient by a combined psychotherapeutic and pharmacotherapeutic approach is described. We focus on the beneficial effect of the atypical antipsychotic olanzapine, which can induce weight gain by an increase of leptin levels.     

Zur Instrumentalisierung des Opferstatus

The article deals with the instrumentalization of victim status, which achieves a definite material psychosocial and narcissistic advantage. Talk shows cultivate victims and idealize them as heroes thus producing ersatz identities. To be singled out from society as ?innocent“ and to be pitied, admired and perhaps envied by others for the attention they attract, might prove to be a source of narcissistic gratification. So whilst victim identity may transform impotence and weakness into a medium for approval, it also fixes the dichotomy between offender and victim.     

Orangutans (Pongo pygmaeus) and bonobos (Pan paniscus) point to inform a human about the location of a tool

Although pointing is not part of great apes’ natural gestural repertoire, they can learn to point to food, in order to request it. To assess the flexibility with which they can use this gesture, one can vary the potential referent of the point. In two previous studies, three orangutans (two of them human-reared) have shown the ability to point to the location of a tool which a human experimenter needed in order to give them food. Here, we tested six orangutans and five bonobos using a set-up in which our subjects had to guide a human experimenter to the hiding place of a fork which was needed in order to retrieve a piece of food for the subject out of a vertical tube. We further examined the potential role of a competitive/deceptive context by varying the identity of the person responsible for hiding the tool. In addition, we implemented three different control conditions in which an object was hidden but it was not necessary to indicate its location to get the food. We found that the majority of subjects spontaneously guided the experimenter to the hiding place of the fork by pointing to it when it was necessary and they did so significantly less in control conditions. We did not find an effect of the person hiding the fork. Our results show that mother-reared orangutans and bonobos are able to point to inform a human about the location of an object that the human needs to procure food for the subject and that they can take into account whether it is relevant or not to do so.

In a no-win situation: The employment–health dilemma

Work and organizational psychology (WOP) research has to date mostly focused on people privileged to have the choice between several attractive job options and less on people who are restricted in their job choice (e.g., due to their qualification or personal contingencies) and have to choose from fewer and often less-than-optimal jobs. Often, the jobs available to the latter are characterized by precarious employment and hazardous working conditions which can put them in the difficult situation of having to choose between a health-threatening job and possible unemployment. Building on interdisciplinary literature, we propose the employment–health dilemma (E-H dilemma) as a framework for analyzing this intrapersonal conflict of having to choose between employment (incurring health threats) and health (incurring economic threats) and discuss potential antecedents and consequences of the E-H dilemma at the societal, organizational, and individual level. We outline the implications of the E-H dilemma and make a case for examining the full spectrum of job choice situations in WOP research. In doing so, we demonstrate what WOP can gain by embracing a more inclusive and multidisciplinary approach: uncovering processes in their entirety (e.g., job choice decisions of all people) and strengthening the role and legitimacy of WOP in society.     

Africa Humiliated? Misrecognition in Development Aid

Critiques of development aid from its recipient’s sometimes draw our attention to the perception of paternalism on the part of ‘development industry’ actors. Even within participatory project designs, critical voices recount experiences of clear power divides and informal hierarchies determining the content and form of ‘cooperation’. While neoliberal as well as neo-Marxist scholars base their critiques on a distributive scheme of global justice, post-development theory emphasizes respect and recognition as the central aspect of justice Indeed, post-development theorists continue to complain of neo-colonial power structures between nations as well as on a micro-level between the ‘experts’ and local people. The latter feel misrecognized in being judged according to the parameters of Western actors within the international community. This article explores how charges of misrecognition within development cooperation challenge the assumption by many liberal political theorists that more global justice could be achieved through more aid.     

Sometimes,often, and always: Exploring the vague meanings of frequency expressions

The article describes a general two-step procedure for the numerical translation of vague linguistic terms (LTs). The suggested procedure consists of empirical and model components, including (1) participants’ estimates of numerical values corresponding to verbal terms and (2) modeling of the empirical data using fuzzy membership functions (MFs), respectively. The procedure is outlined in two studies for data from N = 89 and N = 109 participants, who were asked to estimate numbers corresponding to 11 verbal frequency expressions (e.g., sometimes). Positions and shapes of the resulting MFs varied considerably in symmetry, vagueness, and overlap and are indicative of the different meanings of the vague frequency expressions. Words were not distributed equidistantly across the numerical scale. This has important implications for the many questionnaires that use verbal rating scales, which consist of frequency expressions and operate on the premise of equidistance. These results are discussed for an exemplar questionnaire (COPSOQ). Furthermore, the variation of the number of prompted LTs (5 vs. 11) showed no influence on the words’ interpretations.     

Top-down search for color prevents voluntary directing of attention to informative singleton cues

Visuo-spatial attention can be directed in a top-down controlled way to search for color targets and it can be captured by color contrasts, regardless of color identity. Here we tested whether participants can both search for a particular color target (e.g., red) and make use of a color-contrast cue that predicted the target's most likely position to direct their attention voluntarily. Our results show that this was impossible for the participants. Results support that top-down search for particular colors is incommensurate with directing attention to just any color contrast. The results are discussed in light of the current debates concerning the roles of color and color contrast for visuo-spatial attention.