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   38082篇
  免费   1416篇
  国内免费   15篇
  39513篇
  2020年   378篇
  2019年   404篇
  2018年   749篇
  2017年   701篇
  2016年   820篇
  2015年   537篇
  2014年   630篇
  2013年   3014篇
  2012年   1269篇
  2011年   1377篇
  2010年   657篇
  2009年   759篇
  2008年   1079篇
  2007年   1029篇
  2006年   988篇
  2005年   2146篇
  2004年   1475篇
  2003年   1286篇
  2002年   962篇
  2001年   1042篇
  2000年   993篇
  1999年   799篇
  1998年   441篇
  1997年   412篇
  1996年   350篇
  1995年   363篇
  1994年   334篇
  1993年   362篇
  1992年   667篇
  1991年   600篇
  1990年   668篇
  1989年   565篇
  1988年   534篇
  1987年   533篇
  1986年   537篇
  1985年   605篇
  1984年   531篇
  1983年   487篇
  1982年   399篇
  1981年   359篇
  1979年   491篇
  1978年   436篇
  1977年   359篇
  1976年   359篇
  1975年   463篇
  1974年   528篇
  1973年   484篇
  1972年   372篇
  1968年   373篇
  1966年   344篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
901.
Depressive self-presentation: beyond self-handicapping   总被引:1,自引:0,他引:1  
An experiment was conducted to examine the notion that depressives' responses would reflect a protective self-presentation style (Hill, Weary, & Williams, 1986), the underlying goal of which would be the avoidance of future performance demands and potential losses in self-esteem. In this study, depressed and nondepressed Ss were asked to perform a relatively simple visual-motor task. Half of the depressed and half of the nondepressed Ss were told that if they were successful at the task, they would be asked to perform a 2nd, similar task. The remaining Ss were given no such expectation of future performance. We predicted and found that depressed compared with nondepressed Ss strategically failed at the task when presented with the possibility of future performance and further losses in esteem. Moreover, this strategic failure was associated with some costs; depressed-future performance expectancy Ss experienced more discomfort or negative affect as a result of their performance. The relationship between this depressive self-presentation and self-handicapping strategies is discussed.  相似文献   
902.
This article describes the development and initial evaluation of the A-Trait-Perception (ATP) score, a composite predictor for state anxiety. The ATP score is constructed from trait anxiety and situation perception data derived from the Endler Multidimensional Anxiety Scales (EMAS; Endler, Edwards, & Vitelli, 1989). ATP mathematically combines the individual's trait anxiety and situation perception profiles and adjusts these with a multiplier that reflects the individuals' sensitivity to particular types of situational elements in terms of state anxiety inducement. The utility of the resulting composite variable as a predictor of state anxiety was examined in the context of two field studies. Results of both studies indicated that the ATP variable offered a superior prediction of state anxiety, as compared to four individual trait anxiety facets (social evaluation, physical danger, ambiguous and daily routines). The theoretical import of these results is discussed.  相似文献   
903.
Victim attributions and post-rape trauma   总被引:5,自引:0,他引:5  
This study assessed (a) the kinds of attributions victims make, (b) whether behavioral and characterological self-blame are associated with other variables as hypothesized (e.g., perception of future avoidability of being raped), and (c) whether behavioral self-blame is associated with better post-rape adjustment (Janoff-Bulman, 1979). Attributions and adjustment were assessed in a sample of adult female rape victims seen at a hospital-based rape crisis program. Many victims blamed themselves but tended to place more blame on external factors. The pattern of relations between behavioral and characterological self-blame and other attributional measures did not support the hypothesized distinctions between them. Both kinds of self-blame were significantly associated with increased post-rape depression (all ps less than .05). Attributions strongly predicted adjustment, accounting for up to 67% of the variance in 3-day post-rape depression. The theoretical and clinical implications of these findings are discussed.  相似文献   
904.
Content analysis: a comparison of manual and computerized systems   总被引:5,自引:0,他引:5  
Computerized content analysis is a technique for classifying texts. In personality research it has been used to make inferences about psychological states and traits of the speaker or writer. Whereas computerized techniques have been increasing in both sophistication and ease of use, questions remain regarding their validity compared to hand-scored scales. In this study, we compare a relatively simple computerized technique; a more sophisticated, context-sensitive computerized approach; and a context-sensitive, human-scored system. Seventy-one subjects, representing four diagnostic groups, provided free-speech samples which were scored according to all three methods. Data from each method were then submitted to discriminant and classification analyses. In comparing the classification performance of the three methods, we found that both computerized methods were more accurate than the human-scored method. The time and cost benefits of computerized systems are discussed.  相似文献   
905.
We studied the scores obtained on the Millon Clinical Multiaxial Inventory (MCMI) by Black and White male psychiatric inpatients to determine the presence or absence of racial bias. In predicting psychopathology for the two races, comparisons of MCMI performance indicated significant differences for all diagnoses except the personality disorders. The subjects were then matched into two groups of 209 patients each, according to DSM-III psychiatric diagnoses. The data were analyzed at the item, scale, and structural levels. At the item level, application of the Mantel-Haenszel Procedure revealed that 45 of the 175 items of the inventory were answered significantly different by the two racial groups. Because this number was higher than what could be expected by chance, the finding suggested possible deficiencies in terms of the culture-fairness of the items used in the test. At the scale level, an analysis of variance (ANOVA) demonstrated that the scores obtained by the Black and White groups were significantly different in 9 of the 20 scales (Histrionic, Narcissistic, Antisocial, Paraphrenia, Hypomania, Dysthymia, Alcohol Abuse, Drug Abuse, and Psychotic Delusion). With the exception of the Dysthymic scale, all of the differences were in the direction of the Blacks obtaining a higher score than the Whites. At the structural level, however, a principal components factor analysis performed on each group resulted in factor structures that looked identical.  相似文献   
906.
The Depressive Experiences Questionnaire (DEQ; Blatt, D'Afflitti, & Quinlan, 1976) is critically reviewed. First the developmental, object representations theory differentiating depression into anaclitic and introjective subtypes is presented. The DEQ factors of Dependency and Self-Criticism were initially found to be consistent with these clinically meaningful depressive subtypes. Subsequent research has generally demonstrated that these subtypes, at least as measured by the DEQ, do not hold up well in clinical populations. Furthermore, the validity of the developmental theory of these subtypes is weak. We suggest that more internally consistent and distinct factors should be developed from clinical populations because of their potential clinical usefulness.  相似文献   
907.
The purpose of this study was to examine the relationship between learned resourcefulness and two common addictive behaviors, namely, drinking and smoking. Male and female college students (N = 175) completed the Self-Control Schedule (SCS), the Quantity-Frequency-Variability questionnaire, and a smoking history form. Learned resourcefulness was related to self-reported patterns of alcohol consumption; specifically, heavy drinking subjects were lower in learned resourcefulness than were light and moderate drinkers who, in turn, were lower in learned resourcefulness than were infrequent drinkers and abstainers. Learned resourcefulness was only modestly related to smoking, with students who had never smoked evidencing somewhat higher learned resourcefulness than ex-smokers and current smokers. Overall, these data provide correlational support for the notion that learned resourcefulness may protect young adults against substance abuse.  相似文献   
908.
909.
Unification of models for choice between delayed reinforcers.   总被引:2,自引:2,他引:0       下载免费PDF全文
Two models for choice between delayed reinforcers, Fantino's delay-reduction theory and Killeen's incentive theory, are reviewed. Incentive theory is amended to incorporate the effects of arousal on alternate types of behavior that might block the reinforcement of the target behavior. This amended version is shown to differ from the delay-reduction theory in a term that is an exponential in incentive theory and a difference in delay-reduction theory. A power series approximation to the exponential generates a model that is formally identical with delay-reduction theory. Correlations between delay-reduction theory and the amended incentive theory show excellent congruence over a range of experimental conditions. Although the assumptions that gave rise to delay-reduction theory and incentive theory remain different and testable, the models deriving from the theories are unlikely to be discriminable by parametric experimental tests. This congruence of the models is recognized by naming the common model the delayed reinforcement model, which is then compared with other models of choice such as Killeen and Fetterman's (1988) behavioral theory of timing, Mazur's (1984) equivalence rule, and Vaughan's (1985) melioration theory.  相似文献   
910.
Effects of alcohol and extended practice on divided-attention performance   总被引:3,自引:0,他引:3  
The effects of alcohol and extended practice on divided attention were investigated using a visual tracking task and an auditory detection task. Subjects performed the tasks with and without alcohol, under single-task (S) and dual-task (D) conditions, both before and after they had received extended practice under single-task conditions without alcohol. Tracking accuracy improved with practice and was impaired under divided-attention conditions but was not affected by alcohol. Speed of detection was impaired by alcohol, improved by practice, and impaired by divided attention. Extended practice did not reduce the influence of alcohol. The effects of both alcohol and practice on speed of detection were significantly greater under dual-task conditions than under single-task conditions. Analysis of detection-task reaction times in terms of relative divided-attention costs, (D-S)/S, showed no effect of alcohol, but a highly significant reduction in costs with extended practice. It is concluded that (1) alcohol and practice can have quantitatively, but not qualitatively, similar effects on speeded performance, and (2) the effect of alcohol is not influenced by the attentional requirements of the task.  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