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排序方式: 共有151条查询结果,搜索用时 15 毫秒
31.
Ulf Andersson 《Journal of Cognitive Psychology》2013,25(3):335-352
Phonological processing was examined in a group of individuals with an acquired severe hearing loss and compared to a group of matched normal hearing individuals. The hearing-impaired group was significantly slower and less accurate when performing a visual rhyme-judgement task, and produced fewer rhyming word pairs on a rhyme-generation task than the normal hearing group. In contrast, the hearing-impaired group performed on a par with the normal hearing group on verbal working memory tasks. It is concluded that specific aspects of the phonological system deteriorate in this population as a function of auditory deprivation. In particular, the phonological representations are impaired and this impairment also affects the ability to rapidly perform phonological operations (i.e., analyse and compare). In contrast, phonological processing involved in verbal working memory is preserved in this population. 相似文献
32.
L. L. Thurstone's (1927) model provides a powerful framework for modeling individual differences in choice behavior. An overview of Thurstonian models for comparative data is provided, including the classical Case V and Case III models as well as more general choice models with unrestricted and factor-analytic covariance structures. A flow chart summarizes the model selection process. The authors show how to embed these models within a more familiar structural equation modeling (SEM) framework. The different special cases of Thurstone's model can be estimated with a popular SEM statistical package, including factor analysis models for paired comparisons and rankings. Only minor modifications are needed to accommodate both types of data. As a result, complex models for comparative judgments can be both estimated and tested efficiently. 相似文献
33.
Thirty patients with phobia for blood, wounds and injuries were treated individually with applied tension (AT), exposure in vivo (E), or tension-only (T) for 5 sessions. They were assessed on self-report, behavioral and physiological measures before and after treatment, and at a 1 yr follow-up. All groups improved significantly, and the improvements were maintained at follow-up. Applying stringent criteria, 90% of the AT-, 80% of the T-, and 40% of the E-patients were clinically improved at the end of treatment. The corresponding figures at follow-up were 100, 90 and 50%, respectively. AT differed significantly, and T marginally from E at both assessments. Applied tension, or tension-only should, from a clinical point of view, be considered the treatment of choice for blood phobia. 相似文献
34.
Ulf Kragh 《Scandinavian journal of psychology》1998,39(2):123-124
A paper by I. Zuber and B. Ekehammar in this Journal (38, 1997) is reviewed. The paper advocates that the non-veridical contents in the series of reports in the DMT should preferably be referred, not to psychoanalytic defence mechanisms, but to factors of stimulus order. The methods and the arguments of this investigation are critically examined. 相似文献
35.
The effect of basic motion structures on perceptual grouping was studied with five-dot motion patterns. Four basic motion structures were identified in terms of proximal common and relative motion vectors. In a forced-choice situation, the observers had to decide to which of two pairs of dots a fifth critical dot seemed to belong. Thus, one of two possible three-dot units was chosen by the observers. The two possible three-dot units defined different motion structures, and the chosen motion structure was considered to have stronger grouping power than the alternative structure had. It was found that parallel common motions (perceived translation in the plane) had the strongest grouping power; these were followed by circular common motions (perceived rotation in the plane), concurrent relative motions (perceived translation in depth), and, finally, parallel relative motions (perceived rotation in depth). The results also suggested effects of proximity and orientation of axis of rotation. It is further argued that the relative grouping power of the motion structures could not solely be interpreted in terms of changes of directions and distances between the dots. Instead it is suggested that vector analysis is a fundamental perceptual activity and that basic motion structures determine grouping power. 相似文献
36.
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
37.
Simons Arno Riedel Nico Toelch Ulf Hendriks Barbara Müller-Ohlraun Stephanie Liebenau Lisa Ambrasat Jens Dirnagl Ulrich Reinhart Martin 《Science and engineering ethics》2020,26(6):2893-2910
Science and Engineering Ethics - Promoting translational research as a means to overcoming chasms in the translation of knowledge through successive fields of research from basic science to public... 相似文献
38.
The purpose of the present study was to evaluate the efficiency of temperature variations as a measure against drivers' drowsiness. A system for regulation of the air temperature in the cab was installed in two trucks. Irregular temperature reductions of about 8 degrees C were introduced. The periods between the temperature reductions varied among 5, 6, 7, and 8 min. The periods for the temperature reductions varied between 2, 4, 6, and 8 min. The system was tested with 6 drivers on 54 trips. The system was applied for periods varying between 30 to 300 min. Changes in wakefulness were analysed using subjective ratings by the lorry drivers. The application of the system significantly improved subjectively rated wakefulness. The wakefulness was rated with a questionnaire completed after 10 min. use of a cooling system and at the end of its use. Analysis showed individual differences in the usefulness of the system: 3 of the 6 truck drivers reported positive reactions to the use of the temperature cooling system. 相似文献
39.
Giorgio Grossi Aleksander Perski Ulf Lundberg Joaquim Soares 《Integrative psychological & behavioral science》2001,36(3):205-219
Objective: The study investigated the associations between self-rated financial strain and overall diurnal salivary cortisol levels,
as well as secretory patterns among long-term unemployed individuals.Methods: Psychosocial and life-style variables were assessed by means of questionnaires among 85 participants (mean age 42±9 years;
56% females). Salivary cortisol was sampled on four occasions during a 24-hour period and data was analysed separately for
men and women.Results: Among females, high financial strain was related to higher overall cortisol levels, and to elevated levels in the evening.
These associations did not reach significance among men. Multivariate analyses showed that evening levels of cortisol were
positively associated with financial strain, but largely unrelated to life-style variables and psychological distress.Conclusions: The results suggest that high financial strain influences the diurnal cortisol secretion of unemployed individuals in terms
of elevated cortisol levels in the evening. The mediating mechanisms are in need of further investigation. 相似文献
40.
The aim was to explore whether people high as opposed to low in speech anxiety react with a more pronounced differential facial response when exposed to angry and happy facial stimuli. High and low fear participants were selected based on their scores on a fear of public speaking questionnaire. All participants were exposed to pictures of angry and happy faces while facial electromyographic (EMG) activity from the Corrugator supercilii and the Zygomaticus major muscle regions was recorded. Skin conductance responses (SCR), heart rate (HR) and ratings were also collected. Participants high as opposed to low in speech anxiety displayed a larger differential corrugator responding, indicating a larger negative emotional reaction, between angry and happy faces. They also reacted with a larger differential zygomatic responding, indicating a larger positive emotional reaction, between happy and angry faces. Consistent with the facial reaction patterns, the high fear group rated angry faces as more unpleasant and as expressing more disgust, and further rated happy faces as more pleasant. There were no differences in SCR or HR responding between high and low speech anxiety groups. The present results support the hypothesis that people high in speech anxiety are disposed to show an exaggerated sensitivity and facial responsiveness to social stimuli. 相似文献