全文获取类型
收费全文 | 180456篇 |
免费 | 8032篇 |
国内免费 | 157篇 |
出版年
2020年 | 2797篇 |
2019年 | 3443篇 |
2018年 | 3537篇 |
2017年 | 3988篇 |
2016年 | 4624篇 |
2015年 | 3928篇 |
2014年 | 4822篇 |
2013年 | 23526篇 |
2012年 | 4693篇 |
2011年 | 3813篇 |
2010年 | 3920篇 |
2009年 | 4798篇 |
2008年 | 3981篇 |
2007年 | 3549篇 |
2006年 | 4116篇 |
2005年 | 4122篇 |
2004年 | 3581篇 |
2003年 | 3226篇 |
2002年 | 3052篇 |
2001年 | 3553篇 |
2000年 | 3404篇 |
1999年 | 3315篇 |
1998年 | 2864篇 |
1997年 | 2699篇 |
1996年 | 2616篇 |
1995年 | 2435篇 |
1994年 | 2412篇 |
1993年 | 2375篇 |
1992年 | 2826篇 |
1991年 | 2651篇 |
1990年 | 2539篇 |
1989年 | 2392篇 |
1988年 | 2356篇 |
1987年 | 2399篇 |
1986年 | 2376篇 |
1985年 | 2639篇 |
1984年 | 2658篇 |
1983年 | 2437篇 |
1982年 | 2423篇 |
1981年 | 2400篇 |
1980年 | 2222篇 |
1979年 | 2380篇 |
1978年 | 2269篇 |
1977年 | 2219篇 |
1976年 | 2035篇 |
1975年 | 2187篇 |
1974年 | 2263篇 |
1973年 | 2177篇 |
1972年 | 1744篇 |
1971年 | 1672篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
881.
Gordon W. Russell Sherry L. Di Lullo Dany Di Lullo 《Current psychology (New Brunswick, N.J.)》1988,7(4):312-321
Males were randomly assigned to view either (1) a film clip featuring hockey fights or (2) a film of nonaggressive hockey
action or (3) a no-film control condition after having first been angered or treated politely by an experimental confederate.
The dependent variable was represented by a measure of aggressive mood and a behavioral measure of retaliatory aggression.
Analyses revealed that both angered and nonangered subjects exhibited an increase in aggressive mood following exposure to
the fight film. However, the analysis involving retaliatory aggression against the confederate yielded an anger x film interaction.
While angered subjects were more aggressive than nonangered, only angered subjects retaliated against the confederate after
viewing the fight film. The results were discussed in terms of Berkowitz’s (1974) aggressive cue theory.
A version of this paper was presented at the meeting of the North American Society for the Sociology of Sport, Edmonton, Canada,
November 1987. 相似文献
882.
Fear of Success (FOS) was originally conceived as a unidimensional motive. However, there is both theoretical and empirical
support for the hypothesis that FOS is multidimensional. We factor analyzed the responses of 236 undergraduates to twenty-oneConcern Over the Negative Consequences of Success items and found four factors. Our four factors show considerable overlap with dimensions based on theoretical accounts of
FOS etiology as well as with the factor structures obtained from two other factor analytic studies. Thus, there is converging
evidence that FOS is multidimensional. The relationship between multidimensional FOS and a multidimensional approach to achievement
motivation is discussed. 相似文献
883.
884.
885.
886.
887.
Werner Lowenthal Ph.D. 《The Journal of medical humanities》1988,9(1):44-49
The purpose of this study was to document the responses of pharmacy students and pharmacists to various ethical dilemmas. The responses of the first professional year students, third professional year students and pharmacists were evaluated and compared. In most instances, responses indicated a high priority for patient/client welfare. Pharmacists and students reportedly act with regard to the dignity of life, individual freedom, and an inner sense of right. 相似文献
888.
889.
D. E. McMillan PhD. 《Integrative psychological & behavioral science》1988,23(2):57-66
Pigeons were trained to acquire a new four-response position sequence each day by pecking three response keys in a predetermined order. The key color varied after each correct response prior to food delivery. Acute administration of Γ9-tetrahydrocannabinol (Δ9-THC) up to a dose that completely eliminated responding, had no effect on total acquisition errors, or on within session patterns of error elimination. Chronic administration of Δ9-THC (3–10 mg/kg/day), either before or after the session for 4–7 weeks, also did not affect these error measures, although rates of responding were markedly suppressed and at times no responding occurred Discontinuation of Δ9-THC administration for periods of 4–6 weeks also was without effect on errors. These experiments suggest that neither acute nor chronic Δ9-THC produce specific effects on the repeated acquisition of serial position responses in pigeons. 相似文献
890.
John Polich Maung Aung Donald J. Dalessio 《Integrative psychological & behavioral science》1988,23(1):35-40
Experiment 1 elicited the P1, N1, P2, and N2 components of the long latency auditory evoked potential (AEP) using a 1000 Hz tone presented at 30, 50, or 70 dB SPL and 1-, 3-, or 5- second inter-stimulus intervals to assess the relative effects of the combination of these variables on component amplitude and latency. Four blocks of 16 tone presentations each were recorded from each subject to determine if changes in the AEP would occur because of short-term habituation. Both stimulus factors interacted significantly in a systematic fashion for the amplitude measures, with increases in latency also associated with increases in intensity and inter-stimulus interval. Only minor changes across the four trial blocks for either the amplitude or latency measures were observed over the various stimulus presentation conditions. Experiment 2 employed the same tone stimulus presented at 50 dB SPL and a 3-second inter-stimulus interval. Eight blocks of 64 trials were recorded from each subject on each day for four days to investigate long-term habituation effects. No substantial changes in any of the component amplitudes or latencies were obtained across the 32 trial blocks. It was concluded that intensity and inter-stimulus interval interact to determine AEP amplitude as well as latency values and that the constituent components do not change appreciably with repeated stimulus presentations, even after several days. 相似文献