全文获取类型
收费全文 | 19153篇 |
免费 | 828篇 |
国内免费 | 4篇 |
专业分类
19985篇 |
出版年
2020年 | 239篇 |
2019年 | 286篇 |
2018年 | 405篇 |
2017年 | 425篇 |
2016年 | 453篇 |
2015年 | 328篇 |
2014年 | 394篇 |
2013年 | 1707篇 |
2012年 | 647篇 |
2011年 | 671篇 |
2010年 | 460篇 |
2009年 | 398篇 |
2008年 | 597篇 |
2007年 | 566篇 |
2006年 | 530篇 |
2005年 | 459篇 |
2004年 | 458篇 |
2003年 | 414篇 |
2002年 | 480篇 |
2001年 | 518篇 |
2000年 | 485篇 |
1999年 | 392篇 |
1998年 | 239篇 |
1997年 | 203篇 |
1996年 | 202篇 |
1995年 | 221篇 |
1994年 | 189篇 |
1993年 | 188篇 |
1992年 | 314篇 |
1991年 | 313篇 |
1990年 | 288篇 |
1989年 | 283篇 |
1988年 | 268篇 |
1987年 | 248篇 |
1986年 | 238篇 |
1985年 | 255篇 |
1984年 | 261篇 |
1983年 | 235篇 |
1982年 | 225篇 |
1981年 | 231篇 |
1980年 | 191篇 |
1979年 | 270篇 |
1978年 | 219篇 |
1977年 | 207篇 |
1976年 | 193篇 |
1975年 | 237篇 |
1974年 | 261篇 |
1973年 | 244篇 |
1972年 | 215篇 |
1968年 | 223篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
911.
912.
913.
914.
Jerry D. Harris Bonnie A. Gray Shirley Rees-McGee James L. Carroll Elizabeth T. Zaremba 《Journal of School Psychology》1987,25(4):343-354
School psychologists serving a national, systematic sample of public elementary and secondary schools were surveyed regarding recent referrals. Most referrals were initiated by school staff members (75% of referrals), and the majority occured initially through formal mechanisms (55% of referrals). Most informal requests for assistance or information eventually became, or were thought likely to become, formal referrals. In 92% of cases, the referral agent's initial communication with the psychologist included some designation of what the pupil was doing or not doing that was viewed as problematic. Poor academic performance was of primary concern in 52% of referrals and social/emotional problems in 31%. More boys were referred than girls, and one-half of referrals from the elementary grades involved pupils in grades K-2. Frequency of referral and reason for referral were not independent of pupil's grade or sex. Reason for referral was independent of time of year (October vs. May) and geographical region. 相似文献
915.
916.
Sex differences in spatial task performance of patients with and without unilateral cerebral lesions 总被引:1,自引:1,他引:1
Two visuospatial tasks, the WAIS Block Design and the Street Gestalt Completion Test, were administered to men and women with and without unilateral cerebral lesions. These two tasks represent different categories of visuospatial functions. The Street test is a visual-perceptual gestalt task, requiring the closure of fragmented pictures, whereas Block Design is an analytical, manipulospatial task requiring rotation of spatial coordinates. For the non-brain-damaged group, the men showed a nonsignificant trend toward better Block Design performance relative to the women, whereas there was no sex-related difference in Street performance. For the brain-damaged groups, patients with right hemisphere lesions performed significantly worse than patients with left hemisphere lesions on both the Street test and Block Design, indicating that both tasks were more sensitive to right hemisphere functioning. There was, however, a significant sex X side of lesion interaction on Block Design only, with the men showing a more asymmetrical pattern of scores. These results suggest that sex differences in functional lateralization may underlie sex differences in visuospatial ability, and that sex differences in functional lateralization may be present for only certain visuospatial processes. 相似文献
917.
918.
919.
920.