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881.
Whilst it is accepted that humankind has been responsible for a considerable amount of environmental change, it is only recently that quantitative measures have been devised to express this. Such measures include a habitat index, the ecological footprint and the Living Planet Index. The applications and implications of these measures are discussed along with direct measures of changing atmospheric composition. All indicate that Europe is the most anthropogenically transformed continent and Australasia the least altered. In so far as a population increase of c. 36 per cent is likely to occur in the next 25 years, human induced environmental change is set to continue at a rapid pace. It is likely to be exacerbated by rapid industrialisation in some nations and increasing standards of living. Local, regional and international measures to curb environmental deterioration may temper this to a degree but new technologies e.g. biotechnology, may bring disadvantages as well as advantages.  相似文献   
882.
Book reviews     
Charisma and Social Structure: A Study of Love and Power, Wholeness and Transformation. Raymond Trevor Bradley New York: Paragon House, 1987

The Leadership Challenge: How to Get Extraordinary Things Done in Organizations James M. Kouzes and Barry Z. Posner San Francisco: Jossey‐Bass, (fall) 1987. $21.95 hardback. 362 pages.

Mind Matters: How the Mind and Brain Interact to Create Our Consciousness Lives Michael S. Gazzaniga Boston: Houghton Mifflin, 1988. 269 pages. Hardcover $17.95, Softcover $8.95.  相似文献   
883.
The War on Terror has exposed deep problems within contemporary political practice. It has demonstrated the moral fragility of liberal democracy. Much critical literature on the topic is devoted to uncovering the sources of this fragility. In this paper, we accept the general thrust of much of this literature, but turn our attention to the practical upshot of the criticism. A common feature of the literature is that, when it comes to offering remedies of the problems it identifies, what is offered is ‘diagnosis without treatment’. The negation of a problem is regarded as a solution. For example, if the problem is that the USA is not acting as a good international citizen, the solution is that it begins to act as such. This is like a doctor diagnosing gout and recommending to the patient that they reduce the level of uric acid in their big toe. We argue that diagnosis without treatment is endemic in literature on the War on Terror and the ills of liberal democracy. We divide this literature into five categories and examine representative works in each. At the end of the paper, we describe what is required to avoid offering yet more diagnosis without treatment.  相似文献   
884.
ABSTRACT

Social sharing of positive life experiences has been linked to increased intensity of positive emotion. Less is known about the relations among sharing, the perceived response of the listener, and the duration of positive emotion. We hypothesised that sharing an experience would sustain positive emotion when listeners responded in a manner that highlighted the appraised importance and remarkability of the experience, thereby slowing hedonic adaptation. College students who received a desirable exam grade (N?=?165) reported their emotional response, appraisals, and sharing on the day they received their grade and again the following evening. Sharing was associated with longer episodes of positive emotion and more time spent thinking about the positive event. The association between sharing and emotion duration was greatest when sharing partners were perceived as highlighting the importance and remarkability of the event. This type of sharing also mitigated the fading of emotion intensity over time. These findings suggest that sharing sustains positive emotion by promoting appraisals that “keep the magic alive.”  相似文献   
885.
Anhedonia is a negative prognostic indicator in schizophrenia. However, the underlying nature of this emotional deficit is unclear. Laboratory studies examining patients’ emotional reactions under controlled circumstances have failed to find evidence for a diminished hedonic response, instead finding that patients’ reactions to laboratory stimuli are characterised by high levels of negative emotion. The present study employed lexical analysis of natural speech in 52 patients and 49 non-patient controls while they discussed separate neutral, pleasant and unpleasant autobiographical memories. Patients with clinically rated anhedonia, versus other patients and controls, showed a dramatic increase in negative emotion expression when discussing pleasurable memories, but they showed no corresponding decrease in positive emotion. These findings provide further evidence that “anhedonia” is more reflective of negative emotional states than the absence of positive ones. These findings also raise questions about how positive and negative emotions can be simultaneously co-activated in patients with schizophrenia.  相似文献   
886.
Cognitive models of anxiety and depression have long suggested a central role for future-oriented thinking in these disorders. Experimental studies suggest that anxiety and depression are characterised by distinct future-oriented thinking profiles, and that these profiles are markedly different from those of asymptomatic adults. In this paper, we review these profiles and propose two explanatory models marked by two different neurocognitive systems. The Reconstructive Memory Model emphasises a role for emotionally driven learning and retrieval in episodic foresight (i.e., the construction of future-oriented scenarios), and the Valuation Model proposes that an overweighing of risk and uncertainty estimates can be invoked to explain the future-oriented thought patterns. We consider the effectiveness of interventions aimed at altering such thought patterns. We suggest that future research aimed at elucidating the neurobiological underpinnings of future-oriented thinking in anxiety and depression can play an important role in advancing development of effective biological and psychosocial interventions for these disorders.  相似文献   
887.
ABSTRACT

Knowledge of cross-informant rating concordance is critical for the assessment of child and adolescent problems in clinical and research settings. We explored parent-youth rating concordance for hair pulling variables, functional impairment, and anxiety symptoms in a sample of child and adolescent hair pullers (n = 133) satisfying conservative diagnostic criteria for trichotillomania (TTM). Whole group analyses reveal significant parent-youth agreement on all study variables. Split group analyses, however, reveal superior parent-youth concordance for the adolescent (15–17 years old) versus younger (10–12 years old) hair pullers for awareness of hair pulling and anxiety scale scores. These results highlight the need for both parent and youth ratings when assessing younger children with TTM.  相似文献   
888.
Recent research using change-detection tasks has shown that a directed-forgetting cue, indicating that a subset of the information stored in memory can be forgotten, significantly benefits the other information stored in visual working memory. How do these directed-forgetting cues aid the memory representations that are retained? We addressed this question in the present study by using a recall paradigm to measure the nature of the retained memory representations. Our results demonstrated that a directed-forgetting cue leads to higher-fidelity representations of the remaining items and a lower probability of dropping these representations from memory. Next, we showed that this is made possible by the to-be-forgotten item being expelled from visual working memory following the cue, allowing maintenance mechanisms to be focused on only the items that remain in visual working memory. Thus, the present findings show that cues to forget benefit the remaining information in visual working memory by fundamentally improving their quality relative to conditions in which just as many items are encoded but no cue is provided.  相似文献   
889.
Fixed-role therapy has primarily been seen as a form of individual therapy. However, Kelly 0955) suggested that it would provide an interesting and useful way of approaching group psychotherapy. This article illustrates the feasibility of Kelly's suggestion in a clinical setting. The group had 5 participants, all of whom had been referred for help with social anxiety or social phobia. Self-report measures were administered before and after group therapy, and the outcome was positive.  相似文献   
890.
Emphasizing differences in activation as well as valence, six studies across a range of situations examined relations between types of job-related core affect and 13 self-reported work behaviours. A theory-based measure of affect was developed, and its four-quadrant structure was found to be supported across studies. Also consistent with hypotheses, high-activation pleasant affect was more strongly correlated with positive behaviours than were low-activation pleasant feelings, and those associations tended to be greatest for discretionary behaviours in contrast to routine task proficiency. Additionally as predicted, unpleasant job-related affects that had low rather than high activation were more strongly linked to the negative work behaviours examined. Theory and practice would benefit from greater differentiation between affects and between behaviours.  相似文献   
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