全文获取类型
收费全文 | 211655篇 |
免费 | 8972篇 |
国内免费 | 156篇 |
专业分类
220783篇 |
出版年
2020年 | 2829篇 |
2019年 | 3479篇 |
2018年 | 3905篇 |
2017年 | 4348篇 |
2016年 | 4883篇 |
2015年 | 3954篇 |
2014年 | 4838篇 |
2013年 | 23577篇 |
2012年 | 5728篇 |
2011年 | 5232篇 |
2010年 | 4419篇 |
2009年 | 5031篇 |
2008年 | 5190篇 |
2007年 | 4866篇 |
2006年 | 5093篇 |
2005年 | 4995篇 |
2004年 | 4418篇 |
2003年 | 3993篇 |
2002年 | 3891篇 |
2001年 | 4957篇 |
2000年 | 4809篇 |
1999年 | 4212篇 |
1998年 | 3004篇 |
1997年 | 2798篇 |
1996年 | 2713篇 |
1995年 | 2522篇 |
1994年 | 2493篇 |
1993年 | 2447篇 |
1992年 | 3570篇 |
1991年 | 3351篇 |
1990年 | 3282篇 |
1989年 | 3067篇 |
1988年 | 3023篇 |
1987年 | 3003篇 |
1986年 | 3060篇 |
1985年 | 3252篇 |
1984年 | 3107篇 |
1983年 | 2799篇 |
1982年 | 2566篇 |
1981年 | 2535篇 |
1980年 | 2336篇 |
1979年 | 2944篇 |
1978年 | 2546篇 |
1977年 | 2423篇 |
1976年 | 2241篇 |
1975年 | 2653篇 |
1974年 | 2817篇 |
1973年 | 2759篇 |
1972年 | 2311篇 |
1968年 | 2306篇 |
排序方式: 共有10000条查询结果,搜索用时 8 毫秒
901.
902.
This paper suggests that aspects of paranoid character are structured around fantasies of magical and concrete connectedness to objects; these fantasies serve to avoid the terrors of object inconstancy. The authors describe how these fantasies are expressed in the psychoanalytic situation and explore their relation to common paranoid phenomena. The paranoid person must maintain these fantasies of connectedness at all cost or risk experiencing unbearable indifference between self and object. Paradoxically, the sacrifice of self and object boundaries inherent in these fantasies makes object constancy even more difficult to achieve because of the secondary defensive use of anger mobilized to protect the boundaries of the self. 相似文献
903.
J L Kantrowitz 《Journal of the American Psychoanalytic Association》1992,40(1):169-194
Analysts have characteristic styles in working with their patients. At times of crisis or stalemate, an alteration in style may facilitate the progress of the treatment. To illustrate the impeding effects of an analytic style at a particular phase of analysis, I describe a stalemate in the analysis of a severely self-critical patient. Recognition of the limiting effects of style on the treatment became apparent in a countertransference enactment, influenced by the patient-analyst match. Self-analysis and alteration in the characteristic style of the analyst resolved the stalemate and enabled the analytic work to progress. 相似文献
904.
Use of approximate weights would greatly simplify decision analysis under certainty since detailed weight elicitation could be avoided. This paper examines the degree to which rank order information about weights can be used to identify a best alternative, or falling uniqueness prescribes an easily implemented rule for selecting a ‘best’ alternative. The prescribed rule uses as weights the centroid of the feasible region defined by the rank order information. In conjunction with the rule, the value of the rank order information can be determined using an ‘expected gain from weight precision’ (EGWP) measure, analogous to ‘expected value of perfect information’ in decision analysis under uncertainty. 相似文献
905.
The main issue of this paper concerns the mediating role of risk appraisal in the relation between past and future behavior. We expected previous risky behavior to heighten risk appraisal, which, in turn, should stimulate preventive behavior. Results ofthree tests of this mediation hypothesis showed that past behavior was strongly related to future behavior; people who behaved hazardously in the past indicated that they tend to do so in the future. Generally, the expected relation between past behavior and risk appraisal was supported. More risky behavior in the past was associated with a heightened risk appraisal. Results also indicate a relation between risk appraisal and future behavior, but in the opposite direction as predicted. Heightened risk appraisal was related to increased levels of risk in future behavior. When predicting future behavior by both risk appraisal and past behavior the effect of risk appraisal on future behavior disappeared, while past behavior remained a strong predictor of future behavior. In a few cases risk appraisal still predicted future behavior when past behavior was controlled for. Unfortunately, these cases showed the opposite relation; i.e., heightened risk appraisal was related to more risky future behavior. Implications of these findings for research on the role of risk appraisal will be discussed. 相似文献
906.
G Chastain 《Acta psychologica》1992,79(2):101-114
The role of lateral masking in more rapid performance improvement with peripheral than with central precuing was investigated. A peripheral precue to the inside of the target location provided less masking at zero precue-target delay than a precue to the outside (experiment 1) or a precue involving a partial target at the target location (experiment 2). There was no significant interaction between precue-target delay and precue type in a comparison of inside precues and precues involving a briefly-brightened box around the target location, although overall performance was significantly poorer with the latter (experiment 3). Performance was better at short precue-target delays with inside precues than with central precues (experiment 4), yet it did not improve significantly more rapidly. Minimizing lateral masking with peripheral precues thus eliminates the dramatic performance improvement sometimes observed across short precue-target delays, causing performance to be consistently better than with central precues across these delays. 相似文献
907.
Our goal was to test whether current hemisphere predominance is a predictor of scores on standardized measures of personal optimism and preference for risk. In two between-subject experiments, current hemisphere predominance was measured by the direction and extent of line bisecting errors. Pearson correlations and median splits of the line bisecting errors showed significantly greater personal optimism and preference for risk with left hemisphere predominance. These results support previous research in which manipulation of hemisphere predominance produced similar effects on personal optimism in normal individuals and on risk taking in lesioned and normal samples. We conclude that the association of optimism and risk with left hemisphere predominance can be observed in resting as well as in manipulated situations. 相似文献
908.
Seventh-grade students and teachers from twenty-three middle and junior high schools were surveyed to determine the association between teacher attitudes, behavioral intentions, and smoking behavior and the prevalence of student smoking. Teacher attitudes toward smoking policies were found to be strongly related to the current smoking behavior of the teacher but not consistently related to student smoking. In addition, teacher likelihood of intervening showed a modest association with teacher smoking status, with current smokers generally indicating being the least likely to intervene for student possession or use of cigarettes. Teacher intentions to intervene were strongly associated with the prevalence of smoking among boys but not girls. 相似文献
909.
Male youths from abusive family environments may be particularly vulnerable to recruitment into satanic cults. Families that are abusive, devalue or invalidate the abused child's feelings, blame the child for the family's problems, and view the world in rigidly moralistic terms create environments in which the youths are likely to identify with the aggressor and label themselves as evil. These youths, who may have poor social skills and feelings of anger, low self-esteem, self-blame, depression, powerlessness, and isolation as a result of the abuse, may use satanic involvement as a means of legitimizing their experience and differentiating from a negatively enmeshed and/or abusive family system. In this paper, the etiological factors and treatment approaches of ten hospitalized boys who had voluntarily involved themselves in repeated group satanic activities during their adolescence are described, and two case illustrations are given. Recommendations for understanding and treating such cases are provided. 相似文献
910.
A series of focus group interviews was used to identify major sources of stress and coping responses of Grade 10 students. Relationships with parents and family, work, and lack of money were found to be important sources of stress. Major coping responses included substance use and diversionary activities. Differences between academic streams (tracks) in sources of stress and coping responses were examined. 相似文献