首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   24087篇
  免费   934篇
  国内免费   5篇
  25026篇
  2019年   350篇
  2018年   406篇
  2017年   409篇
  2016年   471篇
  2015年   325篇
  2014年   457篇
  2013年   2132篇
  2012年   745篇
  2011年   788篇
  2010年   509篇
  2009年   527篇
  2008年   710篇
  2007年   718篇
  2006年   691篇
  2005年   586篇
  2004年   628篇
  2003年   564篇
  2002年   605篇
  2001年   555篇
  2000年   614篇
  1999年   468篇
  1998年   334篇
  1997年   270篇
  1996年   274篇
  1995年   282篇
  1994年   257篇
  1992年   375篇
  1991年   377篇
  1990年   383篇
  1989年   356篇
  1988年   331篇
  1987年   294篇
  1986年   314篇
  1985年   337篇
  1984年   291篇
  1983年   322篇
  1982年   267篇
  1981年   285篇
  1980年   252篇
  1979年   364篇
  1978年   332篇
  1977年   259篇
  1975年   312篇
  1974年   342篇
  1973年   330篇
  1972年   282篇
  1971年   249篇
  1968年   288篇
  1967年   273篇
  1966年   245篇
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
191.
Age differences in memory for item and source information   总被引:1,自引:0,他引:1  
  相似文献   
192.
Passive and dependent qualities are commonly found in psychiatric patients suffering from a variety of disorders. While such tendencies are often secondary to an Axis I clinical syndrome, they are occasionally more persistent and refractory. The present article attempts to provide therapeutic guidelines useful when working with clients displaying stable personality traits of passivity and dependency. An attempt is made to adapt and combine several therapeutic techniques to be applicable to passive-dependent clients. More specifically, problem-solving approaches and self-control strategies can be used to facilitate autonomy if precautions are taken to reduce the dogmatic and didactic styles commonly employed with these techniques. The Socratic method of interviewing is posited as a useful means of developing problem-solving skills without creating unnecessary dependence on the therapist. Self-control strategies can help reduce the reliance on others as the primary source of satisfaction for dependent clients. In this way, passive-dependent clients may become more self- reliant and autonomous in their daily functioning.The author would like to thank Patti Watson, Katie Brooks, and Estyn Williams for comments made on an earlier draft of this article.  相似文献   
193.
194.
James Blachowicz 《Synthese》1987,71(3):235-321
In recent years, there have been some attempts to defend the legitimacy of a non-inductive generative logic of discovery whose strategy is to analyze a variety of constraints on the actual generation of explanatory hypotheses. These proposed new theories, however, are only weakly generative (relying on sophisticated processes of elimination) rather than strongly generative (embodying processes of correction).This paper develops a strongly generative theory which holds that we can come to know something new only as a variant of what we already know — and that the novelty of this variant is not thereby eliminated nor beyond our powers of characterization, a double requirement that is vital for resolving the Meno paradox. In this light, the discovery of a new hypothesis is taken as the correction of an antecedent hypothesis in response to the discrepancies between the predictions generated by that antecedent hypothesis and the desired result (e.g. the actual data to be explained). This process comprises two parallel operations: the first, which demonstrates the positive role of the facts in generating new explanations, involves a mapping between multiple hypotheses and sets of predictions generated from those hypotheses, for the purpose of taking the actual data as a determinable variant of neighboring sets of predictions. This mapping permits the facts to indicate how corrective adjustments in the working hypothesis should be made; the second operation, which demonstrates the positive role of explanations in generating new facts, involves a mapping between differently construed versions of the actual data and the conceptualizations derived from those perceptual versions, for the purpose of taking the working hypothesis as a determinable variant of these neighboring conceptualizations. This mapping permits a given hypothesis to generate predictions increasingly closer to the actual facts.The proposed theory provides the basis for a reformed conception of justification. Because hypotheses are meaningful only as variants of neighboring hypotheses, and because such variation is corrective, their justification in the reformed sense will incorporate not only their justification in the traditional sense, but their generation as well.  相似文献   
195.
The relationship between risk factors and the severity and type of childhood disorder, as measured by parent-completed Child Behavior Checklists, was examined for 768 children, ages 4–16, seen at a child mental health center. Regression analyses revealed no significant relationships between any combination of risk factors and the total number of behavior problems, internalizing, or externalizing scores for the entire group, males and females separately, or for the age and sex groupings of 6- to 11- and 12-to 16-yearolds. Chi-square tests revealed no relationship of profile type with any risk factor or with total number of risk factors. Implications for broad-based child assessment and risk factor research within a clinical population are discussed.We wish to thank Orin Bolstad, Linda Magnuson, and Julian Taplin for their assistance in this project.  相似文献   
196.
The functional development of cardiac and adrenal medullary responses to reflex activation of the sympathetic nervous system was studied in preweanling spontaneously hypertensive (SHR) and Wistar-Kyoto (WKY) normotensive rats. Pups of the two strains received injections of insulin or saline at 2, 4, 8, 12, or 16 days of age and were sacrificed 3 h later. Insulin administration produces a significant decrease in circulating levels of glucose which in turn results in a centrally mediated increase in sympathetic outflow. The induction of ornithine decarboxylase (ODC) in heart and the depletion of epinephrine from the adrenal medulla served as tissue markers of functional sympathetic neurotransmission. WKY and SHR pups had comparable levels of ODC activity in heart under basal conditions. In contrast, levels of catecholamines in the adrenals were greater in SHR pups at 2 and 4 days of age. Following insulin administration, SHR pups exhibited a greater induction of cardiac ODC activity at 2, 4, and 8 days of age compared to age-matched WKY controls. However, there were no differences between SHR and WKY pups in the magnitude of the adrenal medullary response to insulin-induced hypoglycemia. These alterations in sympathetic-target tissue development during the first postnatal week of life may contribute in part to the higher arterial pressures maintained by SHRs throughout the lifespan.  相似文献   
197.
The influence of sexual experience on preference behavior was investigated in adult female rats. In the first experiment, preference behavior for sexually active males versus estrous females was investigated in female rats who were experienced with mounting behavior. Preference of these mount experienced females was compared to preference of females who were naive in this respect. Mount experience with estrous females induced a female-directed preference in ovariectomized female rats, irrespective of whether the females were treated with OIL or with testosterone-propionate (500 micrograms TP, injected once 48 h prior to testing). Sexually naive, OIL-treated females did not show a preference for males or females, but TP induced a preference for a male. Individual differences in mount frequency were not correlated with preference behavior. In the second experiment, the influence of experience with feminine sexual responses on preference behavior was investigated. OIL-treated and TP-treated females oriented equally toward males and females when they had been given the opportunity to copulate with males prior to the preference tests. The results strongly suggest that prior sexual experience is an important determinant of preference behavior. The female's behavior during sexual interactions was, however, not predictive of later preference.  相似文献   
198.
In three experiments, 469 subjects watched a short videotape of a bank robbery and later estimated the duration of the tape. Subjects invariably overestimated the durations. Accuracy of time estimation was unrelated to amount of free recall (Experiment 1) or accuracy of memory (Experiment 2). Females overestimated to a greater degree than males (Experiments 2 and 3). A more stressful version of the event produced greater overestimates than a less stressful version (Experiment 3). The relationship between induced arousal and time estimation appears to be different for men and women.  相似文献   
199.
Seventy-five patients admitted to the psychiatric unit of a general hospital were administered a brief neuropsychological screening battery. Discharge diagnoses obtained from the medical records revealed that 20% had brainbased pathology. A discriminant function analysis resulted in a five-variable model (Symbol-Digit Modalities Test, educational level, Psychiatric-Organic subscale of the MMPI, and Shipley Vocabulary and Abstraction scores) which correctly classified 84% of the subjects, with 87% correct identification of the brain-damaged group. A jackknife cross-validation procedure resulted in comparable hit rates.  相似文献   
200.
The emergence of counseling in Malaysia illustrates the importance of a strong professional association and counseling training programs at the university level.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号