全文获取类型
收费全文 | 8262篇 |
免费 | 436篇 |
国内免费 | 4篇 |
出版年
2023年 | 99篇 |
2022年 | 139篇 |
2021年 | 180篇 |
2020年 | 248篇 |
2019年 | 224篇 |
2018年 | 461篇 |
2017年 | 436篇 |
2016年 | 384篇 |
2015年 | 231篇 |
2014年 | 280篇 |
2013年 | 1085篇 |
2012年 | 588篇 |
2011年 | 584篇 |
2010年 | 377篇 |
2009年 | 247篇 |
2008年 | 472篇 |
2007年 | 390篇 |
2006年 | 336篇 |
2005年 | 290篇 |
2004年 | 197篇 |
2003年 | 201篇 |
2002年 | 166篇 |
2001年 | 91篇 |
2000年 | 115篇 |
1999年 | 72篇 |
1998年 | 42篇 |
1997年 | 43篇 |
1996年 | 35篇 |
1995年 | 29篇 |
1994年 | 36篇 |
1993年 | 31篇 |
1992年 | 40篇 |
1991年 | 39篇 |
1990年 | 37篇 |
1989年 | 34篇 |
1988年 | 36篇 |
1987年 | 25篇 |
1986年 | 17篇 |
1985年 | 28篇 |
1984年 | 25篇 |
1983年 | 15篇 |
1981年 | 15篇 |
1979年 | 20篇 |
1976年 | 16篇 |
1974年 | 16篇 |
1972年 | 16篇 |
1971年 | 16篇 |
1968年 | 18篇 |
1966年 | 17篇 |
1965年 | 16篇 |
排序方式: 共有8702条查询结果,搜索用时 15 毫秒
261.
Flores Sarazúa E Borda Más M Pérez San Gregorio MA 《The Spanish journal of psychology》2005,8(1):45-55
The purpose of this survey is to detect common personality features in people infected with AIDS who have a case history of drug addiction and who live in a situation of social exclusion. The sample comprised 105 male participants from the Autonomous Community of Andalusia, divided into 4 groups: (a) 30 men with AIDS, having an intravenous drug addiction case history and who live in a condition of social exclusion; (b) 30 men with IVDA case history, also living in a situation of social exclusion; (c) 15 men in a social exclusion condition; and (d) 30 men in a condition of social adaptation. The evaluation instruments were an author-designed semi-structured interview and the Multiaxial Clinical Inventory (MCMI-II; Millon, 1987). Although some differences were found, the results indicate that there is no specific personality profile in the "social exclusion" population. People in a condition of social exclusion (AIDS, drug addicts, and poor people) may obtain similar scores in the variables studied, but there is no clear specific personality profile in the excluded population, although there may be certain situations in which the segregated groups present similar behaviors. Furthermore, these behaviors do not always correspond to personality features but are adaptive responses to a harsh and complex reality. 相似文献
262.
In the context of a medium-term study designed to integrate the simulation of different types and processes of learning-such as classical, operant, and some cognitive types--one must start with other more elementary ones that are facilitators of the more complex types and processes. Of special interest is habituation, owing to the filtering out of irrelevant stimuli, which means that the simulated agent does not have to respond to them. This paper presents two difference functions constructed to computationally simulate the characteristics that define habituation. The behavior of these functions is described, as are differences arising from stimulus intensity and interstimulus intervals. Results are compared with existing empirical data. 相似文献
263.
Twenty-four detoxified opiate addicts were randomized to an experimental group and a control group to evaluate efficacy of a group cue-exposure treatment to reduce or extinguish classically conditioned responses to drug-related stimuli. Assessment included psychophysiological responses (skin temperature, skin conductance level--SCL--, and heart rate) to a videotape and subjective measures (subjective craving, positive and negative affect) before and after the videotape. The experimental group received a group cue-exposure program to drug-related stimuli that comprised twelve treatment sessions administered three times weekly. The treatment program significantly reduced conditioned responses to drug-related stimuli, as measured by SCL and positive affect. 相似文献
264.
Over the last years several European patents were opposed for protecting technology violating the morality requirement under
Article 53(a) EPC. Attempts have been made by the Appeal Boards of the European Patent Office (EPO), as well as by amendments
introduced into the Implementing Regulations of the European Patent Convention (EPC), to address this sensitive patentability
requirement more precisely. The most recent hot topic coming up in this context is the patentability of stem cells. It is
to be expected that this discussion will still go on in the field of biotechnological inventions for the next several years.
An earlier version of this paper was presented at an international conference, “The Ethics of Intellectual Property Rights
and Patents,” held in Warsaw, Poland on 23–24 April, 2004. 相似文献
265.
This article argues that the intellectual legacy of Rousseau is at the root of the failure of 20th century egalitarian theorists
such as Rawls and Dworkin to engage intellectually with feminist theorists working within the liberal tradition. Through an
extended critique of Rousseau’s delineation of the relationship between liberal citizenship and the private family, it argues
that the failure of such liberal theorists to take gender hierarchy seriously is a consequence of their attempt to place the
private family outside the sphere not only of politics, but also of justice. 相似文献
266.
Paus T 《Trends in cognitive sciences》2005,9(2):60-68
Non-invasive mapping of brain structure and function with magnetic resonance imaging (MRI) has opened up unprecedented opportunities for studying the neural substrates underlying cognitive development. There is an emerging consensus of a continuous increase throughout adolescence in the volume of white matter, both global and local. There is less agreement on the meaning of asynchronous age-related decreases in the volume of grey matter in different cortical regions; these might equally represent loss ("pruning") or gain (intra-cortical myelination) of tissue. Functional MRI studies have so far focused mostly on executive functions, such as working memory and behavioural inhibition, with very few addressing questions regarding the maturation of social cognition. Future directions for research in this area are discussed in the context of processing biological motion and matching perceptions and actions. 相似文献
267.
It seems to be a phenomenon of contemporary life that we consider goodness embarrassing and rather dull. In contrast, the
activities and inner lives of villains are deemed more complex and fascinating than those of good people. This paper attempts
to understand the conception of goodness that underlies this phenomenon, and I suggest that informing it is the combination
of two ideas, in tension with each other: firstly, a distorted understanding of the ancient conception of full virtue as the
absence of all inner conflict; and secondly, the intuition that real goodness is only apparent and generated in inner conflict.
In response, I offer an alternative picture of goodness as an ongoing, active and progressive relation to value, and conclude
that in order to render goodness attractive again we need more adequate portraits of goodness from both philosophy and art. 相似文献
268.
Three-year-old children were tested on three categorization tasks of increasing levels of abstraction (used with adult baboons in an earlier study): the first was a conceptual categorization task (food vs toys), the second a perceptual matching task (same vs different objects), and the third a relational matching task in which the children had to sort pairs according to whether or not the two items belonged to the same or different categories. The children were tested using two different procedures, the first a replication of the procedure used with the baboons (pulling one rope for a category or a relationship between two objects, and another rope for the other category or relationship), the second a task based upon childrens prior experiences with sorting objects (putting in the same box objects belonging to the same category or a pair of objects exemplifying the same relation). The children were able to solve the first task (conceptual categorization) when tested with the sorting into boxes procedure, and the second task (perceptual matching) when tested with both procedures. The children were able to master the third task (relational matching) only when the rules were clearly explained to them, but not when they could only watch sorting examples. In fact, the relational matching task without explanation requires analogy abilities that do not seem to be fully developed at 3 years of age. The discrepancies in performances between children tested with the two procedures, with the task explained or not, and the discrepancies observed between children and baboons are discussed in relation to differences between species and/or problem-solving strategies. 相似文献
269.
Buckle S 《Theoretical medicine and bioethics》2005,26(3):175-194
The paper begins by situating Singer within the British meta-ethical tradition. It sets out the main steps in his argument for utilitarianism as the ‘default setting’ of ethical thought. It argues that Singer’s argument depends on a hierarchy of reasons, such that the ethical viewpoint is understood to be an adaptation – an extension – of a fundamental self-interest. It concludes that the argument fails because it is impossible to get from this starting-point in self-interest to his conception of the ethical point of view. The fundamental problem is its mixing the immiscible: the Humean subordination of reason to interest with the Kantian conception of reason as universal and authoritative. 相似文献
270.
This study presents a database of 500 words from five semantic categories: animals, body parts, furniture, clothing, and intelligence.
Each category contains 100 words, and data on lexical availability, age of acquisition, imageability, typicality, concept
familiarity, written word frequency, and word length in number of syllables are provided with each word. The full set of norms
may be downloaded from www.psychonomic.org/archive. 相似文献