全文获取类型
收费全文 | 33825篇 |
免费 | 1364篇 |
国内免费 | 8篇 |
出版年
2020年 | 317篇 |
2019年 | 455篇 |
2018年 | 588篇 |
2017年 | 622篇 |
2016年 | 617篇 |
2015年 | 454篇 |
2014年 | 563篇 |
2013年 | 2510篇 |
2012年 | 1029篇 |
2011年 | 1092篇 |
2010年 | 634篇 |
2009年 | 636篇 |
2008年 | 949篇 |
2007年 | 932篇 |
2006年 | 879篇 |
2005年 | 786篇 |
2004年 | 774篇 |
2003年 | 698篇 |
2002年 | 731篇 |
2001年 | 1032篇 |
2000年 | 942篇 |
1999年 | 733篇 |
1998年 | 409篇 |
1997年 | 323篇 |
1996年 | 322篇 |
1992年 | 560篇 |
1991年 | 553篇 |
1990年 | 537篇 |
1989年 | 546篇 |
1988年 | 535篇 |
1987年 | 503篇 |
1986年 | 529篇 |
1985年 | 584篇 |
1984年 | 465篇 |
1983年 | 439篇 |
1982年 | 363篇 |
1981年 | 342篇 |
1979年 | 529篇 |
1978年 | 387篇 |
1976年 | 362篇 |
1975年 | 439篇 |
1974年 | 491篇 |
1973年 | 509篇 |
1972年 | 409篇 |
1971年 | 381篇 |
1970年 | 378篇 |
1969年 | 408篇 |
1968年 | 490篇 |
1967年 | 421篇 |
1966年 | 422篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
921.
922.
923.
This study examined the effects of children's need for approval (nApp) and a situational variable-frequency of expectancy statements-on children's achievement cognitions and behaviour. We replicated the Dweck and Gilliard (1975) paradigm, but also mea sured children's nApp. Ninety fifth grade boys and girls stated expectancies either prior to each trial, prior to the first and last trials, or prior to the last trial only. We found that although high and low nApp children lowered their expectancies after failure, high nApp children lowered them less than low nApp children. In contrast, persistence was influenced only by the frequency of expectancy statements and not by children's nApp. The results are discussed in the context of the interactional point of view in personality psychology. 相似文献
924.
We argue that Shogan's critique, as well as that of Fox, fails to engage with the central focus of our article, which was to characterize and evaluate different approaches to lesbian ethics and to propose an alternative to the more familiar approaches. 相似文献
925.
Despite the importance of probability assessment methods in behavioral decision theory and decision analysis, little attention has been directed at evaluating their reliability and validity. In fact, no comprehensive study of reliability has been undertaken. Since reliability is a necessary condition for validity, this oversight is significant. The present study was motivated by that oversight. We investigated the reliability of probability measures derived from three response modes: numerical probabilities, pie diagrams, and odds. Unlike previous studies, the experiment was designed to distinguish systematic deviations in probability judgments, such as those due to experience or practice, from random deviations. It was found that subjects assessed probabilities reliably for all three assessment methods regardless of the reliability measures employed. However, a small but statistically significant decrease over time in the magnitudes of assessed probabilities was observed. This effect was linked to a decrease in subjects overconfidence during the course of the experiment. 相似文献
926.
George A. Clum Ph.D. Patti Lou Watkins Janet W. Borden Susan E. Broyles John Hayes 《Journal of Rational-Emotive & Cognitive-Behavior Therapy》1993,11(4):179-193
The present study evaluated the efficacy of a new intervention, Guided Imaginal Coping (GIC), compared to imaginal exposure (IEX), and a waiting-list control (WLC) condition among 24 clinic outpatients meeting DSM-III-R criteria for panic disorder (PD) or PD with agoraphobia. GIC was the more consistently effective intervention, with individuals demonstrating significant improvement in frequency and severity of panic attacks (Pas) as well as significant reductions in physiological and subjective arousal to provocative imagery. Individuals in the IEX intervention demonstrated less consistent improvement on the dependent measures, while individuals in the WLC condition essentially remained unchanged. Both GIC and IEX were effective according to a composite measure of clinically significant improvement. However, only GIC was superior to the WLC condition when clinical improvement was defined as zero PAs at follow-up. These findings, while preliminary, suggest that GIC can be added to the armamentarium of effective approaches to treating PD. 相似文献
927.
Ronald C. Martella Ph.D. Ian J. Leonard B.S. Nancy E. Marchand-Martella Ph.D. Martin Agran Ph.D. 《Journal of Behavioral Education》1993,3(1):77-86
We examined the effects of a self-monitoring program on reducing the frequency of negative statements of a student with mild mental retardation who was enrolled in a self-contained classroom at a middle school. A changing criterion design was used within a multiple baseline design across two classroom periods. Additionally, the frequency of positive statements was reported. The results showed a decrease in the number of negative statements, and an increase in the number of positive statements. Maintenance data collected up to 8 weeks after the program ended indicated that the student continued to emit positive rather than negative statements. The use of this procedure to decelerate undesirable behavior is discussed. 相似文献
928.
Carol Z. Garrison Ph.D. Cheryl L. Addy Ph.D. Robert E. McKeown Ph.D. Steven P. Cuffe M.D. Kirby L. Jackson A.B. Jennifer L. Waller Ph.D. 《Journal of child and family studies》1993,2(4):339-352
To determine the frequency and correlates of nonsuicidal physically self-damaging acts in 12–14 year olds, a two stage epidemiologic survey with a self-administered questionnaire (N=3283) followed by a psychiatric interview of a subsample of the adolescents and their parents (N=444) was used. Prevalence estimates of interview validated nonsuicidal physically self-damaging acts were 2.46% in males and 2.79% in females. Significant relationships were found between nonsuicidal physically self-damaging acts and suicidal ideation, major depression and undesirable life events. Data suggest that physically self-damaging acts occur at substantial rates during early adolescence. The strong correlation between nonsuicidal self-destructive acts and both suicidal ideation and major depression clarifies prior conflicting reports in the literature and suggests that a history of self-damaging acts should be taken into consideration when evaluating for possible depression and suicide risk. 相似文献
929.
Irwin Silverman Susan E. Dickens Marion Eals Judith Fine 《Infant and child development》1993,2(3):135-144
This study emanated from the long-standing question of whether a maternal bonding process similar to other mammalian species occurs in humans. The perceptions of adult adoptees and a matched sample of non-adoptees about their parents' behaviours towards them were compared on an original Parental Solicitude Scale. As hypothesized, birth children perceived their mothers as the more solicitous parent, but ratings of adoptive mothers showed a unilateral decline. Further, the differential ratings for birth and adoptive mothers occurred mostly for the factors labelled benignity vs abuse and tolerance vs control, rather than caretaking vs neglect, which was congruent to reported effects in prior studies of lack of mother-infant contact during the sensitive period for bonding. An alternative explanation of the data was also tested but not substantiated. 相似文献
930.
Can spatial frequency differences between local and global forms account for differences in the way different levels of structure are analyzed? We examined this question by having subjects identify local or global forms of hierarchical stimuli that had beencontrast balanced. Contrast balancing eliminates low spatial frequencies, so that both local and global forms must be identified on the basis of high spatial frequency information. Response times (RTs) to global (but not local) forms were slowed for contrast-balanced stimuli, suggesting that low spatial frequencies mediate the global RT advantage typically found. In contrast, interference between local and global forms was little affected by contrast balancing or by shifts of attention between local and global forms, suggesting that it does not result from inhibitory interactions between spatial frequency channels or from temporal precedence of low versus high spatial frequency information. Finally, shifts of attention between local and global forms were also little affected by contrast balancing, suggesting that they were not based on spatial frequency. 相似文献