Evidenzbasierte Psychotherapie

Zusammenfassung Seit einiger Zeit wird auch in der Psychotherapie – so wie in anderen Bereichen der Medizin – eine intensive und kontroverse Diskussion über die wissenschaftlichen Standards und deren Praxisrelevanz geführt. Dabei nehmen Fragen der Qualitätssicherung und der Entwicklung von Leitlinien einen zunehmenden Raum ein. Von besonderer Bedeutung sind in diesem Zusammenhang die Evidence Based Medicine (EbM) und ihre methodischen Standards, in deren Mittelpunkt experimentelle Therapiestudien stehen. Im Beitrag wird das Konzept der Evidence Based Medicine im Kontext der Psychotherapie (Evidence based Psychotherapy) vorgestellt und unter methodischen und inhaltlichen Gesichtspunkten diskutiert. Eine zentrale Frage ist dabei die inhaltliche Aussagekraft und die Übertragbarkeit von wissenschaftlichen Befunden auf die klinische Praxis.      

Task-set inhibition in chunked task sequences

Exploring the hierarchical control relationship between different levels of representation and processing is important for understanding how the mind controls itself. In the present study, the relationship between chunking (a sequence-level process) and task-set inhibition (a task-level process) in the performance of task sequences was investigated to evaluate the hypothesis that within-chunk facilitation reduces then−2 repetition cost (slower performance forn−2 task repetitions than forn−2 task switches) attributed to task-set inhibition. An experiment is reported in which subjects were induced to chunk sequences such thatn−2 repetitions occurred within or between chunks. Direct evidence of chunking was obtained, andn−2 repetition cost was smaller whenn−2 repetitions occurred within chunks than between chunks. These findings are consistent with an elaborated hypothesis that attributes the reduction inn−2 repetition cost to priming of task goals rather than direct modulation of task-set inhibition.     

Knowledge alters visual contrast sensitivity

Research has shown that the visual system’s sensitivity to variations in luminance (visual contrast) within a particular area of the retina is affected in a bottom-up fashion by the ambient contrast levels in nearby regions. Specifically, changes in the ambient contrast in areas surrounding the target area alter the sensitivity to visual contrast within the target area. More recent research has shown that paying attention to the target or target area modulates contrast sensitivity, suggesting a top-down influence over contrast sensitivity that is mediated by attention. Here we report another form of top-down influence over contrast sensitivity that is unlikely to be mediated by attention. In particular, we show that knowledge and/or expectations about the levels of visual contrast that may appear in upcoming targets also affect how sensitive the observer is to the contrast in the target. This sort of knowledge-driven, top-down contrast sensitivity control could be used to preset the visual system’s contrast sensitivity to maximize discriminability and to protect contrast-sensitive processes from a contrast overload. Overall, our results suggest that existing models of contrast sensitivity might benefit from the inclusion of top-down control mechanisms.     

The Biobehavioral Model of Persuasion: Generating Challenge Appraisals to Promote Health1

By borrowing from the biopsychosocial model of challenge and threat, we may understand when health communications adequately motivate behavior change or when they are overly distressing and inhibit behavior change. The present studies were guided by the biobehavioral model of persuasion, which predicts that different health appeals should evoke different appraisals, as well as psychological and physiological responses that motivate the adoption or rejection of health behaviors. Challenging messages should be associated with approach motivational tendencies, whereas threatening messages should be linked to avoidance. Findings from 2 experiments support the biobehavioral model of persuasion and offer mechanisms that confer message effectiveness. By understanding the psychological and physiological processes that drive message effectiveness, message designers can create more effective health appeals.     

Operant generalization of auditory tempo in quail neonates

Operant generalization, a building block of cognition, has never been studied in neonates. We developed a preparation for newly hatched quail in order to investigate the form of the generalization gradient very early in development. For their first 4–5 days after hatching, northern bobwhite chicks pecked for brief heat presentations while hearing a high-pitched sound repeated at a constant rate (nondifferential training). Tempo generalization was then assessed in extinction. A significantly excitatory average gradient resulted despite minimal postnatal experience.     

Therapie des chronisch-komplexen Tinnitus

Tinnitus ist ein Ph?nomen, welches für fast jeden Menschen physiologisch unter ruhigen Umgebungsbedingungen subjektiv wahrnehmbar wird. Im psychosomatisch-psychotherapeutischen Setting ist dieses Symptom in der Regel im Rahmen einer Somatisierungsst?rung (F45.0; F45.1) oder des chronisch-komplexen Tinnitus (F54.0, H93.1) anzutreffen. In der vorliegenden Arbeit wird ein integrativer HNO-?rztlicher und psychosomatischer Therapieansatz vorgestellt: Ziel der Behandlung ist es, die Komponenten der akustischen Wahrnehmung zu reorganisieren, das Ohrger?usch und die psychisch emotionale Wertung zu entkoppeln sowie dessen psychologische Bedeutung zu ?ndern. Weiters wird ein Modell vorgestellt, wie die Depression – als h?ufigste komorbide Achse-I-St?rung – in das diagnostisch- therapeutische Erkl?rungsmodell integriert werden kann. Zuletzt werden M?glichkeiten er?rtert, wie Patienten mit chronisch-komplexem Tinnitus zur Aufnahme einer psychotherapeutischen Behandlung motiviert werden k?nnen.     

Erinnerungen an Hannes

Dein Tod hat eine Leere hinterlassen, die schwer zu füllen sein wird. Seltsamerweise ist kein Schmerz in mir, nur ein dankbares Erinnern an fünf Jahre, die ich für dich da war, für dich da sein durfte. T?glich bin ich um die Mittagszeit zu dir gefahren, um dich zu füttern, dir ein wenig Gesellschaft zu leisten, dein unweigerliches Versinken in deine eigene Welt, wenn schon nicht aufzuhalten, denn das war unm?glich, so doch zumindest ein wenig hinauszuz?gern.     

Liberty and justice for all? Implications of exposure to the U.S. flag for intergroup relations

Three studies examined the implications of nationalistic ideologies and exposure to the U.S. flag for the activation of egalitarian concepts and outgroup hostility. Study 1 demonstrated that subliminal exposure to the U.S. flag activated participants' egalitarian concepts. In Study 2, highly nationalistic participants who were exposed to the U.S. flag reported less hostility than did those not exposed to the flag, whereas the flag did not influence the hostility of participants low in nationalism. Study 3 demonstrated that for participants high in nationalism, greater activation of egalitarian concepts on subliminal exposure to the U.S. flag was associated with less hostility toward Arabs and Muslims in the presence of the U.S. flag. The theoretical and practical implications of these findings are discussed.