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   32885篇
  免费   1231篇
  国内免费   15篇
  2021年   286篇
  2020年   453篇
  2019年   455篇
  2018年   669篇
  2017年   710篇
  2016年   711篇
  2015年   497篇
  2014年   575篇
  2013年   2791篇
  2012年   1168篇
  2011年   1189篇
  2010年   744篇
  2009年   630篇
  2008年   1032篇
  2007年   877篇
  2006年   782篇
  2005年   715篇
  2004年   606篇
  2003年   619篇
  2002年   612篇
  2001年   756篇
  2000年   763篇
  1999年   523篇
  1998年   280篇
  1992年   502篇
  1991年   482篇
  1990年   483篇
  1989年   488篇
  1988年   439篇
  1987年   442篇
  1986年   460篇
  1985年   502篇
  1984年   431篇
  1983年   390篇
  1982年   280篇
  1981年   324篇
  1979年   454篇
  1978年   325篇
  1977年   291篇
  1976年   285篇
  1975年   418篇
  1974年   470篇
  1973年   492篇
  1972年   423篇
  1971年   418篇
  1970年   388篇
  1969年   412篇
  1968年   509篇
  1967年   485篇
  1966年   468篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
861.
Unconscious fantasy is conceptualized as a representation for drive-related, conflict-laden, wish-fulfilling views of human experience. These are usually related to sexuality, and refer to birth, intrauterine existence, primal scene, castration, and seduction. Unconscious fantasy may be transformed into works of art through a variety of artistic means. The employment of formal means for the representation of fantasy may be the product of an endopsychic perception. Thus, structural attributes of the psyche may also find representation. An example is used from the creative process in the construction of a novel by Henry James, The Spoils of Poynton. In the process of fulfilling artistic purposes in the construction of his plot, the author made use of derivatives of unconscious fantasy which surface in the process of creation. The work of art is the integration of unconscious derivatives which become transformed into artistic structure.  相似文献   
862.
The recent focus on empathy as the essential activity in psychoanalytic data gathering has underemphasized the complexity of psychoanalytic observation and has failed to identify what truly makes it unique among modes of psychological investigation. It is a process that includes introspection and empathy. However, it also includes the analyst's observation of the patient's behavior, and particularly verbal behavior, in a way that is not necessarily empathic. The psychoanalytic use of introspection and behavioral observation together, as they are modified by the analysand's free association and the analyst's evenly hovering attention, provides a unique method of data gathering. The transient, mutually related regressions of analyst and analysand which partly constitute the analyzing instrument modify the field of observation available to both, providing better access to derivatives of the analysand's unconscious mental functioning. This more complex concept of psychoanalytic observation, as opposed to that in which empathy is predominant, has important implications for psychoanalytic training, clinical work, and theory.  相似文献   
863.
The old homeless and the new homelessness in historical perspective   总被引:2,自引:0,他引:2  
In the 1950s and 1960s homelessness declined to the point that researchers were predicting its virtual disappearance in the 1970s. Instead, in the 1980s, homelessness increased rapidly and drastically changed in composition. The "old homeless" of the 1950s were mainly old men living in cheap hotels on skid rows. The new homeless were much younger, more likely to be minority group members, suffering from greater poverty, and with access to poorer sleeping quarters. In addition, homeless women and families appeared in significant numbers. However, there were also points of similarity, especially high levels of mental illness and substance abuse.  相似文献   
864.
In this paper, we study the ability of a non-fluent aphasic patient, BN, to comprehend morphologically complex words when they appear in utterance contexts. We first establish that he is insensitive to the contextual appropriateness of both derived and inflected words. In a further experiment we show that he has no difficulty processing the stems of complex words and conclude that his problem is with the bound morphemes themselves. We then ask whether this problem is due to his inability to access either the phonological form of a morphologically complex word or its semantic and/or syntactic content. We find that only the access of semantic and syntactic content is impaired. We conclude from these six studies that: (a) BN presents a counter-example to the claim that non-fluent patients have particular difficulty with those aspects of morphology which have a syntactic function; (b) BN processes both derived and inflected words by mapping the sensory input onto the entire full-form of a complex word, but the semantic and syntactic content of the stem alone is accessed and integrated into the context. The semantic and syntactic implications of the suffix are never evaluated. This implies separate representation of the stems and suffixes of some types of morphologically complex words.  相似文献   
865.
A rationale for, and data from, a trial of a theory of item generation by algorithms whose origins are cognitive models of task performance are presented. Since Spearman (1904), intelligence has been operationally defined and assessed in human subjects by administering identical test items whose content and order have been fixed only after empirical iterations. In our approach, intelligence is ostensively defined by theoretically determined algorithms used for item construction and presentation. Knowledge of what cognitive factors limit human performance makes it possible to vary within tightly specified parameters those features of the tasks that contribute to difficulty, which we call radicals, to let those components of the tasks that do not contribute to difficulty vary randomly, and to counterbalance aspects of answer production that might induce biases of response. Empirical data are based on the generation of five different short tests demanding only functional literacy as a prerequisite for their execution. Four parallel forms of each test were administered to young male Army recruits whose scores were collated with their Army Entrance Test results, which were not previously known to us. Results show that the parallel, algorithm-generated item sets are statistically invariant, which item generation theory demands; and that the individual tests differentially predict Army Entrance Test scores. We conclude that IQ test performances are parsimoniously explained by individual differences in encoding, comparison and reconstructive memory processes.  相似文献   
866.
An invisible displacement test was administered to cats in order to test the hypothesis that search behaviour in this species is influenced by their limited capacity for object permanence as well as by their previous experience with the environment. Experiment 1 compared three groups of cats in a five-choice hiding task in which the hiding places could be discriminated by their spatial positions. Two groups received a visible displacement training before the invisible displacement test and one group did not. Experiment 2 compared two groups of trained subjects in the same task, but the hiding places could be discriminated by spatial and visual cues. The results confirmed that cats are unable to solve problems with invisible displacements. The visible displacement training improved their performance, but was not sufficient to make them succeed. Experience with the hiding potential of the covers also gives more persistence to search behaviour. Finally, the distribution of search attempts is not determined by the proximity to the target and is influenced only partially by the subjects' previous experience. Like Stage 5 infants, cats rely mainly on their immediate perception. They search for an object in the last location they have seen it disappear or under the nearest cover from this location.  相似文献   
867.
868.
The relationship between gender and social skill measured by performance on a role play test was examined in a sample of 57 schizophrenics, 33 affective disorder patients, and 20 nonpatient controls. Female schizophrenics were more skilled than male schizophrenics, but no gender differences were present in the affective patients or the controls. Longitudinal analyses conducted on the schizophrenic group indicated that the superior social skill of women was stable over the year following a symptom exacerbation. Symptoms and social adjustment improved for both men and women over the year, but did not differ according to gender. The implications of the results for gender differences in the long-term outcome of schizophrenia are discussed.  相似文献   
869.
Increased attention has been directed recently to assisting persons with severe handicaps to express preferences concerning events in their lives. We evaluated a program for assessing choice-making skills to provide opportunities for persons with profound mental retardation to express food and drink preferences. In Experiment 1, the assessment procedure involving repeated, paired-item presentations resulted in active choice making and the identification of preferences for all 5 participants. Results also indicated that caregiver opinion was not predictive of participant food and drink preferences. A survey of service providers supported the importance of meal-related choices in this population. In Experiment 2, the practicality of the assessment procedure was supported by demonstrating that (a) routine caregivers could apply the procedure with appropriate supervision to provide choice opportunities, and (b) results of the procedure were predictive of participant choices when a less structured and more normal opportunity to express a preference was provided during regular mealtimes. Results are discussed in terms of extending the developing technology of preference and reinforcer identification to other important areas for persons with severe disabilities.  相似文献   
870.
We evaluated the effects of several choice-related variables on the work performance of adults with severe handicaps. After assessing client work preferences, three choice-related situations were presented: (a) providing clients with the opportunity to choose a work task, (b) assigning a preferred task, and (c) assigning a nonpreferred task. Results indicated that clients attended to work tasks almost twice as much when they chose their tasks and when assigned to work on preferred tasks versus when assigned to work on nonpreferred tasks. Results are discussed regarding the need to assess systematically the effects of choice-related variables.  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