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261.
Stefan T. Radev Ulf K. Mertens Andreas Voss Ullrich Köthe 《The British journal of mathematical and statistical psychology》2020,73(1):23-43
Complex simulator-based models with non-standard sampling distributions require sophisticated design choices for reliable approximate parameter inference. We introduce a fast, end-to-end approach for approximate Bayesian computation (ABC) based on fully convolutional neural networks. The method enables users of ABC to derive simultaneously the posterior mean and variance of multidimensional posterior distributions directly from raw simulated data. Once trained on simulated data, the convolutional neural network is able to map real data samples of variable size to the first two posterior moments of the relevant parameter's distributions. Thus, in contrast to other machine learning approaches to ABC, our approach allows us to generate reusable models that can be applied by different researchers employing the same model. We verify the utility of our method on two common statistical models (i.e., a multivariate normal distribution and a multiple regression scenario), for which the posterior parameter distributions can be derived analytically. We then apply our method to recover the parameters of the leaky competing accumulator (LCA) model and we reference our results to the current state-of-the-art technique, which is the probability density estimation (PDA). Results show that our method exhibits a lower approximation error compared with other machine learning approaches to ABC. It also performs similarly to PDA in recovering the parameters of the LCA model. 相似文献
262.
Stefan Bird-Pollan 《The Philosophical forum》2020,51(4):377-398
In this paper, I argue that so called “systematic critiques” of the liberal conception of law in Catherine MacKinnon and Critical Race Theory which have traditionally been seen to reject liberalism should really be understood as subjecting the liberal conception of law as impartial and just to an immanent critique. Critical Race Theory and MacKinnon both seek to unmask the seemingly neutral subject which authorizes law as in reality a hegemonic and oppressive subject. They also employ the tools of liberalism, demanding justice and equal protection under the law. I argue that the apparent contradiction of their demands can be understood by seeing the subject itself as combining these contradictions at the level of the relation between the unconscious and consciousness. The ego strives for rational self-organization while the unconscious contains sedimented socially transmitted prejudice. There is thus room within both for the struggle for freedom and justice espoused by liberalism at the conscious level as well as for the unconscious perpetuation of prejudice and domination. I conclude that MacKinnon’s work and that of CRT show that liberalism must not be abandoned as post-structuralism does, but that liberals is in fact aided by its critics. 相似文献
263.
Stefan Czoschke Cora Fischer Julia Beitner Jochen Kaiser Christoph Bledowski 《British journal of psychology (London, England : 1953)》2019,110(2):256-267
Stimulus representations in working memory depend on memory traces of past stimuli both from previous trials and from the current trial. However, it is unclear whether the same or different mechanisms underlie this serial dependence across and within trials. We directly contrasted estimates of bias for pairs of immediately successive stimuli across and within trials. In each trial, participants memorized two consecutive motion direction stimuli (S1 and S2) and after a short delay were cued to report one of them. We found serial dependence across trials: The current S1 was attracted towards the preceding S2 when the latter had been cued for report. In contrast, within the same trial S2 was repulsed from S1. In addition, repulsion within a trial occurred for a broader range of motion direction differences between stimuli than attraction across trials. A second experiment in which 25% of trials did not require a response demonstrated that across‐trial attraction did not depend on whether the previous S2 actually had to be reported. Our findings provide evidence for two types of serial dependence operating across and within trials. They support the notion of different mechanisms integrating or segregating current from similar past memory contents depending on their task relevance. 相似文献
264.
Elizabeth Hahn Rickenbach Stefan Agrigoroaei Matthew Hughes Margie E. Lachman 《Applied cognitive psychology》2019,33(4):709-719
Brain training is increasingly popular, and many believe in the efficacy of such programs without empirical evidence. We examined whether instructions promising memory improvement would influence subjective and objective cognition. Participants (n = 145; age: M = 50.64) were randomly assigned to a memory improvement or memory task condition. Participants completed demographic and perceived control over cognition measures, in addition to cognitive tasks and subjective cognition items for 7 days. Participants in the improvement condition reported significantly greater memory increases than those in the memory task condition. This effect was moderated by perceived control over cognition; participants in the improvement condition with high control beliefs were significantly more likely than those with low control beliefs or those in the task condition to report better memory. Individuals with higher control beliefs may be more susceptible to the claims of brain training programs, which is significant given that such programs are increasingly popular and commercially available. 相似文献
265.
The Voortrekker Monument Military festival is one of several military festivals held in South Africa. This study sought to determine the travel motives and life domain effects on the quality-of-life of visitors. Data were gathered from 330 visitors on their travel motives, overall life domains, and quality-of-life. Structural Equation Modelling analysis indicated a positive linear relationship between the visitors’ travel motives, life domains (social-life, leisure-life, and self-life), life domains overall, and quality-of-life; all of which attained good reliabilities. The findings indicate that a visit to a military heritage festival has a positive effect on visitors’ quality-of-life. This research adds to literature in the social sciences, positive psychology, and quality-of-life. 相似文献
266.
267.
In social dilemma situations, individuals benefit from uncooperative behaviour while exploiting resources of the collective. One prominent solution to prevent uncooperative behaviour and to increase cooperation is to establish a sanction system in that private resources are invested by individuals to punish uncooperative interaction partners. The present review is intended to provide an overview concerning motivational determinants of punishment in social dilemma situations. Specifically, we (a) outline that fairness concerns and revenge motivate individuals to punish uncooperative other individuals, (b) show that this is done especially when they possess the basic motivational orientation of a prevention focus. We (c) illustrate that individuals do not punish to acquire a good reputation in the eyes of others, and (d) elaborate on whether individuals punish to regulate satisfaction. Finally, we present empirically neglected motivational factors in studies on punishment in social dilemmas and discuss limitations and possible future directions in this field of research. 相似文献
268.
Angela Heine Verena Thaler Sascha Tamm Stefan Hawelka Michael Schneider Joke Torbeyns Bert De Smedt Lieven Verschaffel Elsbeth Stern Arthur M. Jacobs 《Infant and child development》2010,19(2):175-186
To date, a number of studies have demonstrated the existence of mismatches between children's implicit and explicit knowledge at certain points in development that become manifest by their gestures and gaze orientation in different problem solving contexts. Stimulated by this research, we used eye movement measurement to investigate the development of basic knowledge about numerical magnitude in primary school children. Sixty‐six children from grades one to three (i.e. 6–9 years) were presented with two parallel versions of a number line estimation task of which one was restricted to behavioural measures, whereas the other included the recording of eye movement data. The results of the eye movement experiment indicate a quantitative increase as well as a qualitative change in children's implicit knowledge about numerical magnitudes in this age group that precedes the overt, that is, behavioural, demonstration of explicit numerical knowledge. The finding that children's eye movements reveal substantially more about the presence of implicit precursors of later explicit knowledge in the numerical domain than classical approaches suggests further exploration of eye movement measurement as a potential early assessment tool of individual achievement levels in numerical processing. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
269.
Little is known about applicant reactions to web‐based recruitment and selection procedures. This study examines applicant perceptions of web‐based procedures, based on a field study among 1360 applicants to a multinational financial services organization applying for jobs in the United Kingdom, the Netherlands, and Belgium. With respect to the personal characteristics it was found that external (as opposed to internal), Belgian (as opposed to Dutch), and Internet savvy (as opposed to less savvy) candidates were more satisfied with the online application procedure and its features. However, it was found that features of the website, perceived efficiency and user‐friendliness, were by far the most important determinants of applicant satisfaction. Implications for organizations and future research on E‐recruitment are discussed. 相似文献
270.