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321.
Jurka R. Meichtry Dario Cazzoli Silvia Chaves Sebastian von Arx Tobias Pflugshaupt Roger Kalla Claudio L. Bassetti Klemens Gutbrod René M. Müri 《Journal of Neuropsychology》2018,12(2):271-290
Goodale and Milner's two visual system hypothesis is an influential model for the understanding of the primate visual system. Lesions of either the ventral (occipito‐temporal) or the dorsal (occipito‐parietal) stream produce distinct and dissociated syndromes in humans: visual agnosia is typical for ventral damage, whereas optic ataxia (OA) for dorsal damage. We studied the case of a 59‐year‐old left‐handed woman with a circumscribed lesion around the left posterior occipital sulcus, extending to the underlying white matter. Initially, she presented with a central visual field OA, which regressed to an OA to the right visual hemifield during the 3 months observation period. In addition, tachistoscopic experiments showed visual hemiagnosia to the right visual hemifield. In line with the findings of the neuropsychological experiments, the analysis of the structural MR data by means of a trackwise hodologic probabilistic approach revealed damage to the left superior longitudinal fasciculus and to the left inferior longitudinal fasciculus, indicating an impairment of both the dorsal and the ventral stream. The combination of OA and visual hemiagnosia in the same patient has never been previously described. The present case study thus provides further insights for the understanding of visual processing. 相似文献
322.
Derek Roger Leticia Guarino de Scremin Jo Borril Angela Forbes 《Current psychology (New Brunswick, N.J.)》2011,30(3):234-244
Emotional rumination and inhibition were identified in the Emotion Control Questionnaire (ECQ—Roger and Nesshoever 1987; Roger and Najarian 1989) as two relatively independent dimensions of emotional style, and the two measures have subsequently been shown to be important moderator variables in a range of health and forensic settings. Two other dimensions that emerged in the ECQ, labelled aggression control and benign control, have been shown to form part of the extraversion constellation, and the present paper describes the construction and validation of a new scale focusing exclusively on rumination and inhibition. Revised and expanded item pools for the scales were subjected to exploratory and confirmatory factor analyses, which endorsed the two-factor structure. The new scales were validated concurrently against related scales in different samples, and were shown to be systematically related to two independent indices of health status. 相似文献
323.
Sánchez FJ Kawahara D Thomas LR Worthington R 《Cultural diversity & ethnic minority psychology》2011,17(3):227
This article provides and introduction to the 2011 National Multicultural Conference & Summit Keynote Addresses. The authors explain that they chose to focus on the tension and possibilities within multicultural psychology at the seventh biennial National Multicultural Conference & Summit (NMCS), which was held on January 27-28, 2011, at The Westin-Seattle Hotel. During the 2-day conference, nearly 900 attendees engaged with one another and heard from experts in the field as we focused on the theme, "Unification through Diversity: Bridging Psychological Science & Practice in the Public Interest. Two key sets of presentations are highlighted. 相似文献
324.
One purpose of the present study was to develop and test the factor structure of a multidimensional and hierarchical Norwegian
Principal Self-Efficacy Scale (NPSES). Another purpose of the study was to investigate the relationship between principal
self-efficacy and work engagement. Principal self-efficacy was measured by the 22-item NPSES. Work engagement was measured
by a modified version of the Utrecht Work Engagement Scale (UWES). The participants in the study were 300 principals randomly
drawn from the population of Norwegian principals. Data were collected by means of an electronic questionnaire. Both the NPSES
and the UWES were investigated through confirmatory factor analyses (CFA) before two structural equation models were tested.
Both models specified principal self-efficacy as an exogenous variable and work engagement as an endogenous variable. The
data were analyzed by means of a SEM analysis for latent variables using the AMOS 18 program. Three different models of NPSES
were tested. Both a first- and second-order CFA confirmed that principal self-efficacy constitutes eight dimensions. Furthermore,
both structural models had an acceptable fit to data and revealed that principal self-efficacy was positively related to work
engagement. The results of the study are discussed together with limitations and suggestions for further research. 相似文献
325.
Stanev R 《Theoretical medicine and bioethics》2011,32(1):61-74
This paper analyzes statistical decisions during the interim analyses of clinical trials. After some general remarks about
the ethical and scientific demands of clinical trials, I introduce the notion of a hard-case clinical trial, explain the basic
idea behind it, and provide a real example involving the interim analyses of zidovudine in asymptomatic HIV-infected patients.
The example leads me to propose a decision analytic framework for handling ethical conflicts that might arise during the monitoring
of hard-case clinical trials. I use computer simulations to show how the framework can assist in reconciling certain ethical
conflicts. The framework is partial, lacking the precision of a complete systematization of statistical monitoring procedures
in practice. 相似文献
326.
There is currently a strong focus on responsible research in relation to the development of nanoscience and nanotechnology.
This study presents a series of conversations with nanoresearchers, with the ‘European Commission recommendation on a code
of conduct for responsible nanosciences and nanotechnologies research’ (EC-CoC) as its point of departure. Six types of reactions
to the document are developed, illustrating the diversity existing within the scientific community in responses towards this
kind of new approaches to governance. Three broad notions of responsible nanoresearch are presented. The article concludes
by arguing that while the suggestion put forward in the EC-CoC brings the concept of responsible nanoresearch a long way,
one crucial element is to be wanted, namely responsible nanoresearch as increased awareness of moral choices. 相似文献
327.
Increasing the target-field luminance aids detection for a simultaneously presented black target disc and a black masking annulus. At an intermediate interval separating the onset of the target from the mask, increasing the target-field luminance reduces target detection. This decrease in performance occurs with both temporal and spatial forced choice tasks. With a spatial forced choice, an observer's performance can fall below chance. We associate below-chance performance with a brightness reversal of the black target disc, such that the target disc appears brighter than its surround. The occurrence of brightness reversals follows from our model of the Broca-Sulzer effect, and nonmonotone masking functions result from a generalization of luminance summation. 相似文献
328.
Geneva Gay Assistant Professor Roger D. Abrahams Professor 《Journal of School Psychology》1973,11(4):330-340
The experiences Black youths bring to school with them constitute a distinctive, viable culture. Their subsequent performance in educational and psychological testing situations cannot be assessed adequately without consideration of their particular attitudes, perceptions, and behavioral patterns, for all of these are determined by a kind of cultural conditioning which differs, in some fundamental ways, from mainstream Americans. Several of the social and psychological characteristics of Black culture are discussed. Included are Blacks' attitudes toward whites, systems of time allocations, expressions of identity, attitudes toward learning, dissemination of information among Blacks, Black learning styles and maturation processes. Each is discussed further in terms of its manifestation in a testing or assessment situation; how it conflicts with the assessor's orientations and expectations; and how distorted, unreliable evaluations result from the failure of assessors to consider implications of cultural relativism in interpreting Black behavior. 相似文献
329.
Research into the effects of aging on response time has focused on Brinley plots. Brinley plots are constructed by plotting mean response times for older subjects against those for young subjects for a set of experimental conditions. The typical result is a straight line with a slope greater than 1 and a negative intercept. This linear function has been interpreted as showing that aging leads to a general slowing of cognitive processes. In this article, we show that the slope of the Brinley plot is actually a measure of the relative standard deviations of older versus young subjects’ response times; it is not a measure of general slowing. We examine current models of the effects of aging on mean response time and show how they might be reinterpreted. We also show how a more comprehensive model, Ratcliff’s diffusion model (1978), can account for Brinley plot regularities and, at the same time, provide an account of accuracy rates, the shapes of response time distributions, and the relative speeds of error and correct response times, aspects of the data about which models designed to account for Brinley plots are mute. We conclude by endorsing a research approach that applies explicit models to response time data in aging in order to use the parameters of the model to interpret the effects of aging. 相似文献
330.
The present study assessed three hypotheses of how practice reduces dual-task interference: Practice teaches participants to efficiently integrate performance of a task pair; practice promotes automatization of individual tasks, allowing the central bottleneck to be bypassed; practice leaves the bottleneck intact but shorter in duration. These hypotheses were tested in two transfer-of-training experiments. Participants received one of three training types (Task 1 only, or Task 2 only, or dual-task), followed by dual-task test sessions. Practice effects in Experiment 1 (Task 1: auditory-vocal; Task 2: visual-manual) were fully explained by the intact bottleneck hypothesis, without task integration or automatization. This hypothesis also accounted well for the majority of participants when the task order was reversed (Experiment 2). In this case, however, there were multiple indicators that several participants had succeeded in eliminating the bottleneck by automatizing one or both tasks. Neither experiment provided any evidence that practice promotes efficient task integration. 相似文献