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In the present experiments, we investigated the effects of mindfulness on behavioral extinction and resurgence. Participants received instrumental training; either they received FI training (Experiment 1), or they were trained to emit high rates and low rates of response via exposure to a multiple VR yoked-VI schedule prior to exposure to a multiple FI FI schedule in order to alter their rates of responding learned during Experiment 2. Participants were then exposed to either a focused- (mindfulness) or an unfocused-attention induction task. All participants were finally exposed to an extinction schedule in order to determine whether a mindfulness induction task presented immediately prior to extinction training affected extinction (Experiment 1) and behavioral resurgence (Experiment 2). During the extinction phase, the rates of responding were higher in the control group than in the mindfulness group, indicating that the mindfulness group was more sensitive to the contingencies and, thus, their prior performance extinguished more readily (Experiment 1). Moreover, rates of response in the extinction components less precisely reflected previous training in the mindfulness group, suggesting less resurgence of past behaviors after the mindfulness induction (Experiment 2). 相似文献
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Anne-Kathrin Brebeck Andreas Deussen Ursula Range Costantino Balestra Sinclair Cleveland 《Journal of sports sciences》2018,36(6):605-612
Bubble formation during scuba diving might induce decompression sickness.
This prospective randomised and double-blind study included 108 advanced recreational divers (38 females). Fifty-four pairs of divers, 1 breathing air and the other breathing nitrox28 undertook a standardised dive (24 ± 1 msw; 62 ± 5min) in the Red Sea. Venous gas bubbles were counted (Doppler) 30–<45 min (early) and 45–60 min (late) post-dive at jugular, subclavian and femoral sites.
Only 7% (air) vs. 11% (air28®) (n.s.) were bubble-free after a dive. Independent of sampling time and breathing gas, there were more bubbles in the jugular than in the femoral vein. More bubbles were counted in the air-group than in the air28-group (pooled vein: early: 1845 vs. 948; P = 0.047, late: 1817 vs. 953; P = 0.088). The number of bubbles was sex-dependent. Lastly, 29% of female air divers but only 14% of male divers were bubble-free (P = 0.058).
Air28® helps to reduce venous gas emboli in recreational divers. The bubble number depended on the breathing gas, sampling site and sex. Thus, both exact reporting the dive and in particular standardising sampling characteristics seem mandatory to compare results from different studies to further investigate the hitherto incoherent relation between inert gas bubbles and DCS. 相似文献
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This paper analyzes the productivity development in the German public theater sector for the seasons 1991/1992 to 2005/2006.
Using a stochastic distance frontier approach that allows decomposing total factor productivity change into different sources,
we examine (a) whether Baumol’s cost-disease hypothesis is valid in this sector and (b) if so, whether any negative influence
of the cost-disease effect on productivity can be compensated by efficiency gains. The findings indicate an increase in real
unit labor cost as a result of rising wage rates and thus do support the cost-disease hypothesis. Further, increasing returns
to scale are observed for the majority of the theaters, implying that significant efficiency gains can be realized by the
exploitation of scale economies. However, because of the increasing unit labor cost and an increasing scale inefficiency,
we find an overall decrease in average productivity of about 8% within the sample period. 相似文献
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ABSTRACT The paper discusses and analyzes the coverage of scientific serials in Google Scholar (GS). The focus is on an exploratory study. The study shows deficiencies in the coverage and up-to-dateness of the GS index. Furthermore, the study points up which Web servers are the most important data providers for this search service and which information sources are highly represented. There is a relatively large gap in Google Scholar's coverage of German literature as well as weaknesses in the accessibility of Open Access content. 相似文献
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In recent years the economic performance of public non-profit sectors such as cultural services has become an interesting
economic issue. This is due to the high dependence of cultural institutions on public funding on the one hand and the increasing
cost-pressure on public budgets on the other hand. In order to achieve an efficient, cost-minimizing resource allocation public
authorities who decide on the distribution of public budgets need reliable performance indicators. Against this background,
this paper analyzes the efficiency of German public theaters for the seasons 1991/1992–2005/2006. Using a stochastic frontier
analysis approach, we test whether the assumption of cost-minimizing behavior is reliable in this sector. Moreover, several
panel data models that differ in their ability to account for unobserved heterogeneity are applied to evaluate the impact
of unobserved heterogeneity on the efficiency estimates. The results indicate that the cost-minimizing assumption cannot be
maintained. Consequently, an efficiency analysis based on a cost function approach seems inappropriate in the case of German
public theaters. Further, we find a considerable unobserved heterogeneity across the theaters, which causes a significant
variation in the models’ efficiency estimates. This implies that failing to account for unobserved heterogeneity leads to
biased efficiency values. Overall, our results suggest that there is still space for improvement in the employment of resources
in the sector. 相似文献
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Tom Rosman Anne-Kathrin Mayer Günter Krampen 《Assessment & Evaluation in Higher Education》2015,40(5):740-754
This article examines the significance of information literacy self-assessments in higher education with a special focus on situational conditions increasing their explanatory power. First, it was hypothesised that self-assessments of information literacy correlate higher with factual information literacy if measured after the administration of information search tasks (and tests) due to the intrinsic feedback associated with their completion. Furthermore, it was assumed that self-assessments measured after the administration of information search tasks explain incremental variance over standardised information literacy tests in information search performance. A study with N = 82 German psychology students was carried out to verify these assumptions. Information literacy self-efficacy (as one form of self-assessment), as well as the PIKE-P information literacy test and several standardised information search tasks, was included in the test battery. As both assumptions were largely supported, we recommend that researchers complement their test batteries by self-assessments but warn them against relying primarily on this method. We further recommend that self-assessments should take place at the end of testing. 相似文献
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Anne-Kathrin Stiller M. Florian Kattner Catherine Gunzenhauser Bernhard Schmitz 《教育心理学》2019,39(1):86-111
Effectively regulating negative emotions is important for successful self-regulated learning. However, research has hardly examined which emotion regulation strategies benefit self-regulated learning. In an experimental study, it was examined whether positive reappraisal facilitates self-regulated learning by counterbalancing the depletion of self-control resources. Sixty-one university students engaged in either positive reappraisal or expressive suppression to regulate negative emotions induced by a film clip and then worked on a self-regulated learning task. Participants who engaged in positive reappraisal experienced more positive emotions after the film and had more self-control resources available than participants who used expressive suppression. Moreover, positive reappraisal increased skin conductance during emotion regulation, as compared to expressive suppression. Irrespective of emotion regulation type, positive emotions predicted post-film availability of self-control resources which was positively associated with subsequent self-regulated learning. The results demonstrate beneficial affective and resource-related consequences of positive reappraisal as well as its potential for fostering self-regulated learning. 相似文献
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