全文获取类型
收费全文 | 22036篇 |
免费 | 64篇 |
专业分类
22100篇 |
出版年
2020年 | 28篇 |
2018年 | 3495篇 |
2017年 | 2828篇 |
2016年 | 2271篇 |
2015年 | 216篇 |
2014年 | 107篇 |
2013年 | 245篇 |
2012年 | 620篇 |
2011年 | 2415篇 |
2010年 | 2528篇 |
2009年 | 1485篇 |
2008年 | 1743篇 |
2007年 | 2213篇 |
2006年 | 71篇 |
2005年 | 257篇 |
2004年 | 207篇 |
2003年 | 152篇 |
2002年 | 115篇 |
2001年 | 62篇 |
2000年 | 72篇 |
1999年 | 37篇 |
1998年 | 47篇 |
1997年 | 47篇 |
1996年 | 43篇 |
1995年 | 36篇 |
1994年 | 32篇 |
1993年 | 23篇 |
1992年 | 27篇 |
1991年 | 24篇 |
1990年 | 35篇 |
1989年 | 26篇 |
1988年 | 18篇 |
1987年 | 23篇 |
1986年 | 20篇 |
1985年 | 30篇 |
1984年 | 35篇 |
1983年 | 32篇 |
1982年 | 35篇 |
1981年 | 27篇 |
1980年 | 36篇 |
1979年 | 30篇 |
1978年 | 28篇 |
1977年 | 41篇 |
1976年 | 41篇 |
1975年 | 22篇 |
1974年 | 41篇 |
1973年 | 27篇 |
1972年 | 13篇 |
1969年 | 17篇 |
1967年 | 13篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Ronald N. Giere 《Synthese》1969,20(3):371-387
A comparison of Neyman's theory of interval estimation with the corresponding subjective Bayesian theory of credible intervals shows that the Bayesian approach to the estimation of statistical parameters allows experimental procedures which, from the orthodox objective viewpoint, are clearly biased and clearly inadmissible. This demonstrated methodological difference focuses attention on the key difference in the two general theories, namely, that the orthodox theory is supposed to provide a known average frequency of successful estimates, whereas the Bayesian account provides only a coherent ordering of degrees of belief and a subsequent maximization of subjective expected utilities. To rebut the charge of allowing biased procedures, the Bayesian must attack the foundations of orthodox, objectivist methods. Two apparently popular avenues of attack are briefly considered and found wanting. The first is that orthodox methods fail to apply to the single case. The second is that orthodox methods are subject to a typical Humean regress. The conclusion is that orthodox objectivist methods remain viable in the face of the subjective Bayesian alternative — at least with respect to the problem of statistical estimation. 相似文献
42.
Speed of sorting decks of 32 cards with two alternative stimuli was measured. The stimuli were pairs of dots with attributes of distance between dots, angle of orientation of the pair, and position of the pair to the right or left of center. The attributes varied in relative discriminability and were used in all possible pair- and triple-correlated (redundant) combinations. Results showed an increase in speed of sorting with either an increase in discriminability or an increase in number of redundant attributes. It is argued that the increased speed with addition of redundant attributes is due both to a selective serial processing of attributes (requiring attribute separability) and to an increased discriminability with combined attributes (requiring attribute integrality). 相似文献
43.
Ronald A. Peterson 《Journal of counseling and development : JCD》1967,45(10):1001-1007
Services of rehabilitation agencies and facilities tend to be structured to the needs of the larger American culture. It is important, however, to reconsider our social service programs in view of the needs of different cultural groups when providing services that will aid these individuals to move across cultural boundaries. An attempt is made in this paper to develop a model of the individual who undergoes such cultural transition. Such a model should help define problems in service programs, assess the value of current service activities, and identify areas for developing new services that will aid the overall process of cultural transition. A model of behavior development is outlined, followed by a formulation of a model of the individual in cultural change. 相似文献
44.
It has been observed that the number of different ways in which a graph withp points can be labelled isp! divided by the number of symmetries, and that this holds regardless of the species of structure at hand. In this note, a simple group-theoretic proof is provided.This work was supported by Grant MH 10834 from the National Institute of Mental Health. 相似文献
45.
Serial discrimination-reversal learning with and without errors by the California sea lion 下载免费PDF全文
Ronald J. Schusterman 《Journal of the experimental analysis of behavior》1966,9(5):593-600
A sea lion under water performed virtually without errors on a series of three form-discrimination reversals. Significant training requirements were the combining of a previously well-established size cue preference with the nonpreferred form cue, followed by the gradual reduction of the size cue until it was completely eliminated. Orienting responses reached a peak and then decreased during progressive-dimensional-change training, suggesting critical stages in the transition of attention from the size dimension to the form dimension. Further experimentation revealed that intensive training during these critical stages obviated the need to reduce very gradually the size cue. Without special training sea lions make perseverative errors on a series of form-discrimination reversals. "Emotional" or nontest-oriented behavior was associated only with the occurrence of successive errors. 相似文献
46.
Binocular fusion may be due to interocular inhibitory suppression, an hypothesis difficult to evaluate by phenomenal inspection. A test probe method (reaction time to a light pulse) was used to measure visual sensitivity during binocular rivalry and fusion. The absence of inhibitory effects during fusion fails to support the suppression theory of fusion. 相似文献
47.
Ronald T. Verrillo 《Attention, perception & psychophysics》1966,1(3):149-153
Absolute vibrotactile thresholds are determined on the human tongue and compared to corresponding data obtained on the hand. The mucosa of the tongue is devoid of Pacinian corpuscles but the hand is richly with these nerve endings. Summation of energy is characteristic of responses recorded from tissue containing Pacinian corpuscles and absent where the corpuscle is specifically sensitive to mechanical vibration. 相似文献
48.
Ronald L. Cohen 《Scandinavian journal of psychology》1965,6(2):257-264
Different patterns of figures moving behind a window were viewed by subjects while fixating a point 8.5–11° visual angle NW of the display. With prolonged viewing and small figures, the motion appeared to stop completely. With moving figures which stretched the whole way across the field, perpendicular to the direction of motion, a pulsating or wave motion was experienced. A reduction in the number of moving figures was also reported with all the patterns. When the stimulus motion was stopped, the expected after effect of motion in the opposite direction was usually experienced, although in many cases the stopping of the stimulus motion led to an immediate disappearance of the stimulus figures. 相似文献
49.
50.
When serious malfunctioning of an individual occurs in a secondary system (school, hospital, rehabilitation center, dormitory setting), the tendency often is to focus on the family as both the cause of the malfunctioning and the arena of intervention. Many times, family therapy alone is not enough because a parallel destructive constellation has formed around the Identified Patient in the secondary system as well and the symptoms catalyze that system's own maladaptive patterns. Often the IP is caught in the web of rigid pathological patterns of interactions between the two systems. A unique model of conjoined intersystemic intervention for dealing with such resistance to change is presented. 相似文献