全文获取类型
收费全文 | 58768篇 |
免费 | 2095篇 |
国内免费 | 21篇 |
出版年
2019年 | 599篇 |
2018年 | 823篇 |
2017年 | 812篇 |
2016年 | 931篇 |
2015年 | 689篇 |
2014年 | 804篇 |
2013年 | 5037篇 |
2012年 | 1446篇 |
2011年 | 1490篇 |
2010年 | 964篇 |
2009年 | 942篇 |
2008年 | 1407篇 |
2007年 | 1252篇 |
2006年 | 1145篇 |
2005年 | 1041篇 |
2004年 | 993篇 |
2003年 | 1012篇 |
2002年 | 1006篇 |
2001年 | 1748篇 |
2000年 | 1680篇 |
1999年 | 1246篇 |
1998年 | 595篇 |
1996年 | 671篇 |
1995年 | 630篇 |
1994年 | 633篇 |
1992年 | 1271篇 |
1991年 | 1167篇 |
1990年 | 1167篇 |
1989年 | 1089篇 |
1988年 | 1050篇 |
1987年 | 1042篇 |
1986年 | 1063篇 |
1985年 | 1081篇 |
1984年 | 957篇 |
1983年 | 824篇 |
1982年 | 623篇 |
1981年 | 678篇 |
1979年 | 947篇 |
1978年 | 706篇 |
1976年 | 618篇 |
1975年 | 871篇 |
1974年 | 924篇 |
1973年 | 987篇 |
1972年 | 912篇 |
1971年 | 847篇 |
1970年 | 765篇 |
1969年 | 764篇 |
1968年 | 951篇 |
1967年 | 874篇 |
1966年 | 828篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
821.
D Siegel 《Perceptual and motor skills》1985,60(2):459-466
The purpose of this study was to investigate whether the hypothesized information-processing mechanisms, thought to be reflected by the slope and intercept of the regression of choice reaction time on stimulus information or information transmitted could account for performance on two novel laboratory tasks. In addition, analyses were performed to determine whether these theorized mechanisms represent stable within individual abilities or task specific capabilities. Analysis indicated that the slopes obtained from two different choice reaction time paradigms were unrelated while intercepts were moderately correlated. Examination of the pattern of zero-order correlations further showed that regression components were not meaningfully related to performance on either novel task, suggesting that knowledge of information-processing mechanisms, as assessed in choice RT paradigms, did not enhance the understanding of performance in more complex tasks. 相似文献
822.
Flicker fusion frequencies of 48 healthy controls and of 35 alcoholics were measured to detect possible associations between flicker fusion and signs of nonspecific brain damage, the aim of the study. FFF was statistically significantly lower in patients addicted to alcohol than in healthy subjects. Lower flicker fusion frequencies were associated with the severeness of organic psychosis as rated psychopathologically. The hypothesis that addiction to alcohol is a sign of diffuse, nonspecific, organic brain damage was discussed. 相似文献
823.
Correlations were calculated between the Token Test of Language Development (Token) and scores of the Wechsler Intelligence Scale for Children--Revised (WISC-R) based on responses from 38 Caucasian children (23 boys and 15 girls) of a semi-rural Northeastern Ohio school district. The relatively low Pearson correlations (.25 to .47) between the standard scores in the Token test and WISC-R IQs are discussed in relation to ability and achievement. 相似文献
824.
R M Olig R D Staton W W Beatty H Wilson R I Biberdorf S G Hoag R A Brumback 《Perceptual and motor skills》1985,60(3):879-889
Plasma concentrations of imipramine and amitriptyline and their desmethylated metabolites were measured in 20 children being treated for major depressive illness 2 wk. and 5 to 10 wk. after achieving drug dosages of 2.25 mg/kg body weight. At 2 wk. all children had exhibited clinical improvement, but by 10 wk. 4 of the 10 children treated with imipramine and 5 of the 10 children treated with amitriptyline had experienced clinical relapse of depressive symptoms. Tricyclic antidepressant plasma concentrations and ratios were comparable in the subgroups of children who maintained their clinical improvement and those who relapsed. There was no evidence of a systematic decline in plasma tricyclic antidepressant concentrations in those children who relapsed. 相似文献
825.
Recovery of performance during sleep following sleep deprivation in older normal and insomniac adult males 总被引:3,自引:0,他引:3
M H Bonnet 《Perceptual and motor skills》1985,60(1):323-334
Groups of 12 normal and insomniac male subjects aged 55 to 71 yr. were sleep deprived for 64 hr. In both groups, the sleep loss was preceded by four baseline sleep nights and followed by four recovery nights. Reaction time, immediate recall, sleepiness, and body temperature were measured at approximately 2300, 0115, 0330, 0530, and 0800 during baseline, deprivation and recovery nights. Significant performance or mood differences were not found between the normal and insomniac males on any measure or at any testing period throughout the study. Performance of both groups declined characteristically during sleep loss while subjective sleepiness increased. As in young adults, degraded performance was restored by 8 hr. of recovery sleep. However, subjective sleepiness did not return to baseline levels until early in the second recovery night. It was concluded that chronic insomnia does not result in group performance deficits similar to those seen after chronic sleep loss; and the restorative function of sleep operates as efficiently in older insomniac subjects (who apparently have reduced need to sleep) as in older normal subjects. 相似文献
826.
This paper offers a critique of the prevailing epistemological assumptions which undergird modern Pastoral Care and Counseling education. By drawing upon emerging insights in Transpersonal Psychology and Consciousness disciplines, along with the ontological perspectives of Martin Heidegger and John Macquarrie, the attempt is made to reclaim the modes of knowing of William James and Anton Boison. This paper includes practical and concrete examples of how one supervisor is attempting to put a new paradigm into practice. 相似文献
827.
Effects of presentation complexity on rapid-sequential reading 总被引:1,自引:0,他引:1
828.
The development of beliefs about falling objects 总被引:1,自引:0,他引:1
829.
830.