全文获取类型
收费全文 | 78632篇 |
免费 | 3157篇 |
国内免费 | 49篇 |
出版年
2020年 | 865篇 |
2019年 | 1078篇 |
2018年 | 1544篇 |
2017年 | 1529篇 |
2016年 | 1671篇 |
2015年 | 1121篇 |
2014年 | 1354篇 |
2013年 | 6530篇 |
2012年 | 2463篇 |
2011年 | 2652篇 |
2010年 | 1552篇 |
2009年 | 1605篇 |
2008年 | 2326篇 |
2007年 | 2294篇 |
2006年 | 2061篇 |
2005年 | 2301篇 |
2004年 | 2069篇 |
2003年 | 1854篇 |
2002年 | 1761篇 |
2001年 | 2498篇 |
2000年 | 2434篇 |
1999年 | 1852篇 |
1998年 | 928篇 |
1997年 | 825篇 |
1996年 | 760篇 |
1995年 | 767篇 |
1994年 | 718篇 |
1993年 | 749篇 |
1992年 | 1482篇 |
1991年 | 1403篇 |
1990年 | 1369篇 |
1989年 | 1257篇 |
1988年 | 1238篇 |
1987年 | 1174篇 |
1986年 | 1180篇 |
1985年 | 1267篇 |
1984年 | 1020篇 |
1983年 | 898篇 |
1982年 | 734篇 |
1979年 | 1038篇 |
1978年 | 768篇 |
1975年 | 870篇 |
1974年 | 1003篇 |
1973年 | 985篇 |
1972年 | 875篇 |
1971年 | 766篇 |
1969年 | 720篇 |
1968年 | 906篇 |
1967年 | 859篇 |
1966年 | 777篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
921.
The present study examined the effects of competitive outcome—either a win or a loss—on intrinsic motivation. Winning was hypothesized to facilitate both performance and intrinsic motivation. Fifty-four participants, 29 females and 25 males, competed against a same-gender confederate in a puzzle-solving contest. Following the competition, participants' intrinsic motivation was surreptitiously measured by the amount of time spent playing with the puzzle while alone. Results showed that winning facilitated both actual competitive performance and intrinsic motivation relative to losing. The importance of considering the outcome when predicting intrinsic motivation after competition is discussed. 相似文献
922.
NORMAN A. SCOTT 《Journal of counseling and development : JCD》1985,64(4):272-273
Counseling prisoners involves multiple ethical and therapeutic choices and risks. Prison environments emphasize external control and security. Thus, work in such settings challenges the role of the counselor as a facilitator of client responsibility for independent decision making. 相似文献
923.
D DeJianne T R McGuire A Pruzan-Hotchkiss 《Journal of comparative psychology (Washington, D.C. : 1983)》1985,99(1):74-80
Food-deprived Drosophila melanogaster extend their proboscises following sucrose stimulation of the front tarsi (the proboscis extension reflex). Médioni and Vaysse (1975) reported that the inhibition of this response can be conditioned over trials if such proboscis extensions are punished by applying an aversive stimulus to the foreleg tarsi. In this study, Médioni and Vaysse's basic observations of conditioning were replicated, with a different strain of flies and a modified conditioning apparatus. 相似文献
924.
Bornstein’s hypothesis that there is a loss of color discrimination in tropical areas was not supported in earlier research
in the Cook Islands. Using a more sensitive color vision test (the Farnsworth-Munsell 100-Hue Test), a loss of color discrimination
in the red-purple and blue-green regions of the spectrum was found. The lack of sex differences in this color discrimination
loss supports a physiological rather than a genetic explanation of the observed decrement. 相似文献
925.
926.
927.
L C Drickamer 《Journal of comparative psychology (Washington, D.C. : 1983)》1985,99(4):411-419
Five experiments were performed to investigate the effects of social status in groups of female mice on reproduction and on the release or urinary chemosignals that accelerate or delay the onset of sexual maturation in young females. Treatment of young female mice with urine from bottom-ranking mice in groups of 5 adult females resulted in delays in puberty comparable to those produced by treatment with urine pooled from females housed at moderate to high densities. Treatment of young females with urine from top-ranking females from the same groups resulted in ages for puberty not different from those of control females treated with water. There was an interaction between the social rank of a female and the stages of the estrous cycle with respect to the presence in the urine of chemosignals from grouping that delay puberty and estrus that accelerate puberty. Within groups of 5 adult mice, top-ranking females were in estrus more frequently than bottom-ranking females. Individually caged adult females treated with urine from top-ranking females were in estrus more frequently than females treated with urine from bottom-ranking females. When grouped females were separated into individual cages and mated, there was differential reproductive success: More top-ranking females conceived and bore litters than bottom-ranking females. Bottom-ranking females produced more female pups, relative to top- and middle-ranking females. 相似文献
928.
Lesley A. Owen 《Current Psychology》1985,4(2):108-118
Two experiments investigated whether the initial organization of ambiguous pictures presented supraliminally could be influenced
by the presentation of semantically related pictures that had been pattern masked to prevent conscious representation. Twenty-two
pictures were presented tachistoscopically in a counterbalanced sequence, each alternating with the supraliminal presentation
of its ambiguous counterpart. The results supported the hypothesis that pictures precluded from consciousness by pattern masking
could nevertheless influence the interpretation of ambiguous pictures. Although the possibility of structural priming could
not be completely ruled out in these experiments, there is evidence to suggest that semantic priming is a component. The research
potential of semantic priming is also discussed. 相似文献
929.
930.
Paul C. Quinn B. R. Wooten Evette J. Ludman 《Attention, perception & psychophysics》1985,37(3):198-204
Sternheim and Boynton’s (1966) continuous judgmental color-naming technique was used to assess the elemental nature of achromatic colors. Results from three subjects indicate that the names “black” and “white” are necessary and sufficient to describe achromatic test lights associated with the name “gray.” On the basis of the criteria that establishes a color as elemental, black and white were confirmed as elemental, whereas gray was not. These findings support the assumption of various opponent processing models that there are only two elemental achromatic sensations. In addition, the results support Hering’s (1920) view that black and white differ from the paired-chromatic opponent colors in that they are not mutually exclusive. 相似文献