No Retrieval-Induced Forgetting Under Stress

ABSTRACT— Stress affects memory, yet no study has investigated the effects of stress on memory inhibition: Remembering not only facilitates later recall, but also inhibits retrieval of related material, a phenomenon known as retrieval-induced forgetting. We investigated the effects of stress on this mechanism, which is thought to adaptively guide memory selection. Participants learned categorized lists and were then exposed to either a psychosocial laboratory stressor or a cognitively challenging control treatment. They then actively retrieved parts of the previously learned material. Finally, memory for all initially learned items was tested. In the stress group, unlike in the control group, intervening retrieval practice did not impair final recall. Moreover, salivary cortisol levels increased and psychological well-being decreased in the stress group only. Thus, psychosocial stress abolishes retrieval-induced forgetting. This effect may result from stress-induced hormone release from the hypothalamic-pituitary-adrenal (HPA) axis and may have implications for educational, legal, and clinical issues.     

Words may not be enough! No increased emotional Stroop effect in obsessive-compulsive disorder

Conflicting evidence has been obtained whether or not patients diagnosed with obsessive-compulsive disorder (OCD) share an attentional bias towards disorder-related stimuli. Some of these inconsistencies can be accounted for by suboptimal stimuli selection. In consideration of the heterogeneity of OCD, we investigated Stroop interference effects for two classes of OCD items (i.e., washing and checking) in 23 OCD patients and 23 healthy controls. In order to cover prevalent OCD concerns, item compilation was based on experts' appraisals. Patients neither displayed greater immediate as well as delayed Stroop interference nor any bias for OCD and subtype-congruent stimuli. On the contrary, for washing-related items, OCD patients, and here especially washers, displayed facilitation relative to healthy controls. Although the present study at first sight refutes the notion of an attentional bias in OCD in contrast to other anxiety disorders, several potential moderators need to be considered before this account is ultimately dismissed. In particular, an attentional bias may only be elicited using visual material that is more attention-grabbing than verbal stimuli. Finally, blockwise instead of random item administration and greater consideration of individual relevance may be crucial prerequisites for the effect to emerge.     

To challenge and to be challenged – teachers collective learning in higher education

Critical analyzing and reflective competence are essential objectives in all higher education. In academic professional education, it is a challenge for the teacher to support and develop the student´s critical reflection of both academic and placement studies. The aim of this study is to identify the characteristics of the teacher role and the challenges of the reflective seminar within higher education. Data were gathered through group interviews and analyzed with a phenomenological hermeneutic approach. The result shows four themes; the experience of control and uncertainty, building trust and challenging ideas, the alternation between closeness and distance, and the parallel processes of supervising learning and being in a learning state. One conclusion is that the seminar teaching practice stimulates a collegial learning environment. This practice promotes the teachers pedagogical and didactical competence and an open attitude to each other´s teaching practice.     

Kosteneffektivität ambulanter Psychotherapie

Background

There is a lack of cost-effectiveness analyses (CEA) of psychotherapeutic treatments.

Material and methods

Cost-effectiveness analysis was applied to a sub-sample of 122 psychotherapy outpatients who participated in a large longitudinal study on outpatient psychotherapy (TRANS-OP study). Participants received either psychodynamic psychotherapy (PD, n=69) or cognitive behavioral therapy (CBT, n=53). Effectiveness (change in symptomatic impairment over 2 years) was assessed via the German version of the Outcome Questionnaire (OQ-45.2). Direct health care costs during a 2-year period (psychotherapy and other health care utilizations) were obtained from health insurance claims. Cost-effectiveness analysis methods included incremental cost-effectiveness ratios (ICER) and the net benefit regression approach.

Results

Cost-effectiveness analyses showed no significant differences between the two treatments, neither head-to-head, nor with regard to advantages in certain subgroups of psychotherapy outpatients. A slight dominance of CBT in costs was not maintained after controlling for covariates.

Conclusion

Provided that pivotal covariates such as treatment need are taken into account, cost-effectiveness analyses can contribute to a more equitable distribution of psychotherapeutic resources.     

Psychosomatik der umweltbezogenen Gesundheitsstörungen

Environmental medicine focuses on acute and chronic effects of chemical and physical environmental influences on health as measured objectively and perceived subjectively. Since these influences are very complex, continuously changing and only partially accessible in scientific experiments, subjective causal attributions can be difficult to prove or disprove. Patients with symptoms attributed to environmental triggers perceive health threats from commonly used chemical agents or electromagnetic radiation, frequently without objective findings. Typical examples are “multiple chemical sensitivity (MCS)”, a generalized self-reported hypersensitivity towards ubiquitous chemicals, or “amalgam sensitivity”, where symptoms are attributed to amalgam from dental fillings. Here, the reported symptoms are almost invariably unspecific and show a high overlap with other medically unexplained syndromes. Based on modern psychosomatic conceptualizations, many environment associated illnesses can be regarded as somatoform disorders and treated as such. Apart from a high psychiatric comorbidity, special attention should be paid to dysfunctional cognitions, emotions and behaviour, and the patient’s often limited quality of life.     

Positive schizotypal symptoms predict treatment outcome in obsessive-compulsive disorder

Previous research has suggested that the presence of schizotypal personality disorder may represent a risk factor for treatment failure in obsessive-compulsive disorder (OCD). Relying on a dimensional approach, the present study investigated whether the predictive importance of schizotypal personality is shared by all of its features to the same extent or whether it is confined to a subset of symptoms. Fifty-three patients underwent multi-modal cognitive-behavioral therapy with or without adjunctive antidepressive medication. Therapy response was defined as a 35% decline of the Y-BOCS total score. At baseline assessment, patients were asked to fill out the schizotypal personality questionnaire, the perceptual aberration scale and the Beck depression inventory. Stepwise regression analysis and group comparisons conducted with the schizotypal and depression scales revealed that elevated scores in the positive schizotypal scales, especially perceptual aberrations, were highly predictive for treatment failure. Responders to treatment and non-responders did not significantly differ on other variables or on scores in two scales which measured response biases. The study provides evidence that positive schizotypal symptoms are antecendents for treatment failure in OCD. It needs to be evaluated whether these at-risk individuals benefit from additional intervention, such as the adminstration of low-dose atypical neuroleptics and specifically tailored behavorial intervention.     

Aspects of temporal information processing: A dimensional analysis

A major controversy in the field of prospective temporal information processing refers to the question of whether performance in various temporal tasks can be accounted for by the general assumption of an internal clock rather than by distinct, task-specific timing mechanisms. Therefore, the present study was designed to identify dimensions of temporal information processing. For this purpose, 120 subjects performed eight psychophysical temporal tasks. Correlational and principal factor analyses suggested a common pacemaker-based interval timing mechanism involved in duration discrimination, temporal generalization, and temporal order judgment. On the other hand, rhythm perception and perceived simultaneity/successiveness appeared to be controlled by task-specific processes unrelated to interval-based timing.     

Evidence for episodic retrieval of inadequate prime responses in auditory negative priming

Four experiments are reported in which the mechanisms underlying auditory negative priming were investigated. In Experiments 1A and 1B, preprime-prime intervals and prime-probe intervals were manipulated. The ratio between the 2 intervals determined the size of the negative priming effect. Results are compatible with the episodic retrieval account, according to which the retrieval of inappropriate response information associated with the previous distractor slows down responding when that stimulus becomes the target. Experiment 2 tested a variant of this account, according to which the retrieval of the prime response rather than the retrieval of nonresponse information interferes with responding. Consistent with this variant, participants erroneously responded with the prime response more frequently in the ignored repetition condition than in the control condition. Experiment 3 replicated this finding and generalized it to the visual modality. The authors conclude that the retrieval of the inappropriate prime response is a determinant of the negative priming phenomenon.