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181.
Pigeons were trained on two temporal bisection tasks, which alternated every two sessions. In the first task, they learned to choose a red key after a 1-s signal and a green key after a 4-s signal; in the second task, they learned to choose a blue key after a 4-s signal and a yellow key after a 16-s signal. Then the pigeons were exposed to a series of test trials in order to contrast two timing models, Learning-to-Time (LeT) and Scalar Expectancy Theory (SET). The models made substantially different predictions particularly for the test trials in which the sample duration ranged from 1 s to 16 s and the choice keys were Green and Blue, the keys associated with the same 4-s samples: LeT predicted that preference for Green should increase with sample duration, a context effect, but SET predicted that preference for Green should not vary with sample duration. The results were consistent with LeT. The present study adds to the literature the finding that the context effect occurs even when the two basic discriminations are never combined in the same session. 相似文献
182.
Can tactile stimuli be subitised? An unresolved controversy within the literature on numerosity judgments 总被引:1,自引:0,他引:1
There is a growing interest in the question whether the phenomenon of subitising (fast and accurate detection of fewer than 4-5 stimuli presented simultaneously), widely thought to affect numerosity judgments in vision, can also affect the processing of tactile stimuli. In a recent study, in which multiple tactile stimuli were simultaneously presented across the body surface, Gallace et al (2006 Perception 35 247-266) concluded that tactile stimuli cannot be subitised. By contrast, Riggs et al (2006 Psychological Science 17 271 275), who presented tactile stimuli to participants' fingertips, came to precisely the opposite conclusion, arguing instead that subitising does occur in touch. Here, we re-analyse the data from both studies using more powerful statistical procedures. We show that Riggs et al's error data do not offer strong support for the subitising account and, what is more, Gallace et al's data are not entirely compatible with a linear model account of numerosity judgments in humans either. We then report an experiment in which we compare numerosity judgments for stimuli presented on the fingertips with those for stimuli presented on the rest of the body surface. The results show no major differences between the fingers and the rest of the body, and an absence of subitising in either condition. On the basis of these observations, we discuss whether the purported existence of subitisation in touch reflects a genuine cognitive phenomenon, or whether, instead, it may reflect a bias in the interpretation of the particular psychometric functions that happen to have been chosen by researchers to fit their data. 相似文献
183.
Costa A Peppe A Brusa L Caltagirone C Gatto I Carlesimo GA 《Behavioural neurology》2008,19(1-2):45-48
Growing interest is present in literature on the study of prospective memory functioning in Parkinson's disease (PD). Current data indicate that prospective memory may be impaired in PD and a relationship with general executive dysfunctioning has been suggested. However, although the dopamine dependency of cognitive dysfunction in PD has been widely investigated, poor is known on the dopaminergic modulation of PM. In the present study we explored the effect of acute administration of levodopa on the performance of a PD sample (n=20) in a time-based prospective memory task. PD patients were evaluated in the morning after a 12-hour therapy wash-out in two experimental conditions: i) after levodopa assumption ("on"); ii) without drug administration ("off"). The experimental task required to execute three uncorrelated actions after 10' for three consecutive trials. Distinct scores for the spontaneous recall of the intention to perform the actions (prospective component) and for the correct execution of the actions (retrospective component) have been computed. Results showed that in the "off" condition PD patients were selectively impaired on the prospective component of the task. However, L-dopa administration significantly improved PD patients' performance actually restoring the prospective memory deficit. These results support a critical role of dopaminergic modulation in prospective memory processes in PD patients, possibly through the replacement of dopamine levels in fronto-striatal pathways. 相似文献
184.
Carlos Alberto Sanchez 《Continental Philosophy Review》2008,41(4):441-461
“Exiled” Spanish philosopher José Gaos was the first to translate, in its entirety, Martin Heidegger’s Sein und Zeit. Emilio Uranga, a student of Gaos in Mexico City (exiled since 1938), appropriates Heidegger’s ontological hermeneutics in
an effort to expose the historico-existential structures making up “lo mexicano,” or Mexicanness. Uranga’s Análisis del ser del mexicano (1952) freely and creatively employs the methods of existential analysis, suggesting that the being-there of the Mexican
being is ontologically “insufficient” and “accidental”—modes of being reflected in existential expressions of sentimentality,
indifference, and angst particular to this form of life. As a work indebted to Heidegger’s Sein und Zeit, Analysis of the Being of the Mexican fails to be faithful to this method. This, however, is the source of its value. The purpose of this paper is two-fold: one,
to introduce the Anglo–American philosophical readership to Uranga’s existential phenomenology; and, two, to disentangle the
lines of thought that make up Uranga’s Análisis and in the process defend Uranga from the possible charge that he ignorantly misappropriates Heidegger’s method.
相似文献
Carlos Alberto SanchezEmail: |
185.
Alberto Voltolini 《Erkenntnis》2004,61(1):75-98
There are two interpretations of what it means for a singular term to be referentially direct, one truth-conditional and the other cognitive. It has been argued that on the former interpretation, both proper names and indexicals refer directly, whereas on the latter only proper names are directly referential. However, these interpretations in fact apply to the same singular terms. This paper argues that, if conceived in purely normative terms, the linguistic meaning of indexicals can no longer be held to make these terms referentially indirect under the second interpretation. This result is then generalized to proper names, by ascribing them a normative meaning as well. 相似文献
186.
The aim of this paper is to present a new perspective under which branching-time semantics can be viewed. The set of histories (maximal linearly ordered sets) in a tree structure can be endowed in a natural way with a topological structure. Properties of trees and of bundled trees can be expressed in topological terms. In particular, we can consider the new notion of topological validity for Ockhamist temporal formulae. It will be proved that this notion of validity is equivalent to validity with respect to bundled trees. 相似文献
187.
188.
A century of victimhood: Antecedents and current impacts of perceived suffering in World War I across Europe 下载免费PDF全文
Pierre Bouchat Laurent Licata Valérie Rosoux Christian Allesch Heinrich Ammerer Inna Bovina Susanne Bruckmüller Rosa Cabecinhas Xenia Chryssochoou J. Christopher Cohrs István Csertő Sylvain Delouvée Federica Durante Andreea Ernst‐Vintila Christine Flassbeck Denis Hilton Chantal Kesteloot Resit Kislioglu Alice Krenn Irina Macovei Silvia Mari Nebojša Petrovic Tibor Pólya Alberto Sá Inari Sakki Vladimir Turjacanin Laurence van Ypersele Chiara Volpato Michal Bilewicz Olivier Klein 《European journal of social psychology》2017,47(5):661-662
189.
This paper studies the effect of narrative forms on the remembering of historical accounts. Drawing on Bartlett’s method of repeated reproduction, we analyse how two different historical versions of the Irish conflict — constructed with the same historical events but through different narrative forms — are remembered in three recall sessions by subjects with different national feelings of belonging (Spanish and Basque) and positions in relation to that conflict. The conventionalization and rationalization of memories is also analysed by examining the transformation of the material in the three sessions. Results show two different recall profiles resulting from each version of the story. While in the pro-Irish version repressive events justifying the struggle for Irish independence were more remembered, the pro-British version is reconstructed on those more institutional events that legitimize the maintenance of the United Kingdom. The bias of the narrative form on the remembering of the stories is discussed in regard to history teaching. 相似文献
190.
Mauro Maldonato Alberto Oliverio Anna Esposito 《World Futures: Journal of General Evolution》2017,73(8):491-510
Musical improvisation is a sophisticated activity in which a performer realizes, real-time, melodic, and rhythmic sequences in harmony with those from other musicians. The study of musical improvisation helps one to understand not only the cognition of creativity, but also the complex neuronal basis of executive functions, the relation between conscious and unconscious action, and even more. So far, the prevailing models, founded on the brain imaging method, have focused on the connection between the cortical areas and their cognitive processes. Little attention, on the other hand, has been given to the huge variety of subcortical activities, especially in the basal ganglia. This fundamental subcortical component, through its implicit procedures and the role it plays in memory, is responsible to produce new information all the time, allowing the prefrontal cortex to transform a huge and disordered amount of data in explicit creative acts. The basal ganglia are strongly related to the activation of chemical signals generated by dissonance or lack of symmetry between perception and expectation, participating even in the responses to environmental demands according to the circumstances. Thus, they interact with the frontal cortex and with the limbic system, playing a key role in planning and selecting appropriate actions and in decision making. In this text, we try to explain in which sense improvisation is connected to the processes of executive functions, to creativity and to the integrated activity of cortical–subcortical areas controlling the free flow of ideas and to expressive spontaneity. Eventually, we purpose a model according to which structure (improvisational field) and process (improvisational time) take part at the centrencephalic space of functional integration, which, through both competing and cooperating dynamics, gives way to spontaneous composition. 相似文献