首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   21480篇
  免费   66篇
  21546篇
  2023年   12篇
  2021年   20篇
  2020年   22篇
  2019年   21篇
  2018年   3516篇
  2017年   2840篇
  2016年   2277篇
  2015年   212篇
  2014年   93篇
  2013年   202篇
  2012年   598篇
  2011年   2429篇
  2010年   2535篇
  2009年   1496篇
  2008年   1733篇
  2007年   2190篇
  2006年   77篇
  2005年   252篇
  2004年   191篇
  2003年   153篇
  2002年   104篇
  2001年   63篇
  2000年   79篇
  1999年   41篇
  1998年   30篇
  1997年   24篇
  1996年   21篇
  1995年   12篇
  1994年   10篇
  1993年   10篇
  1991年   16篇
  1990年   23篇
  1989年   16篇
  1988年   20篇
  1987年   13篇
  1986年   8篇
  1985年   9篇
  1984年   21篇
  1983年   14篇
  1982年   11篇
  1981年   11篇
  1980年   7篇
  1979年   7篇
  1978年   10篇
  1976年   9篇
  1975年   9篇
  1974年   10篇
  1973年   7篇
  1971年   8篇
  1969年   12篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
Affection exchange theory predicts that both excessive affection and affection deprivation are associated with poorer health, compared with receiving the level of affectionate communication that one desires. A similar yet-untested prediction is that affection deprivation is more aversive than excessive affection. This preregistered study tested both hypotheses on a battery of mental and physical health outcomes, including depression, loneliness, stress, physical pain, frequency of nightmares, and sleep quality, using a Census-matched sample of U.S. American adults (N = 827). As hypothesized, receiving the right amount of affection was associated with more health-supportive scores on all outcomes than either excessive or deficient affection. Similarly, excessive affection was associated with lower depression, loneliness, stress, and pain, and higher sleep quality, than affection deprivation.  相似文献   
32.
33.
In a genetic analysis of PTC taste sensitivity of mice, Ss were presented tap water and a PTC solution in a two-choice situation. A preference index was used as a measure of taste sensitivity, assuming that ability to taste would lead to avoidance, i.e., negative preference. This assumption, however, lead to the rejection of seven Ss who preferred the test solution. Due to the undesirability of deleting Ss, the data were reanalyzed, using an alternative index of taste sensitivity that required no assumption concerning the hedonic quality of the test solution. Information regarding the inheritance of taste sensitivity to PTC provided the validating criterion for this measure.  相似文献   
34.
35.
36.
The effects of incidental stimuli, defined as visual stimuli not under verbal control, upon a selection task were observed as a function of feedback contingency. Ss judged letter pairs to be valid or invalid completions of preceding letter parts. During the presentation of the letter parts, the response pair or an alternative pair of letters was intermittently presented at a threshold value individually determined for each S. One group of Ss received a light feedback of performance contingent upon responding to the incidental stimuli; whereas a second group received a random noncontingent feedback. The results indicated: (a) both groups responded to the incidental stimuli; (b) feedback contingency had no effect on frequency of responding to the incidental stimuli; (c) frequency of responding to the incidental stimuli remained constant over 32 trials.  相似文献   
37.
38.
Border personality disorder symptomatology is described as it may appear within a university population. The etiology of the disorder is examined from a Kohutian self-psychology perspective. Case-management procedures are outlined with a view to preventing inappropriate contracting with severely disturbed borderline clients. Recommendations are made regarding diagnosis procedures and the use of referrals. The impact of borderline clients on university staff is also discussed.  相似文献   
39.
Depressive personality: reliability, validity, and relation to dysthymia   总被引:1,自引:0,他引:1  
The reliability and validity of Schneider's (1958) construct of depressive personality was evaluated in a sample of 177 outpatients, who were administered structured diagnostic and family history interviews, an extensive battery of inventories, and a 6-month follow-up assessment. The criteria for depressive personality had moderate to good interrater reliability, internal consistency, and test-retest stability, and the assessment of depressive personality traits was not influenced by patients' clinical states. In addition, preliminary support for the convergent and discriminant validity of the depressive personality construct was obtained. Although there were significant relations between the depressive personality and Diagnostic and Statistical Manual of Mental Disorders (3rd ed. and rev. 3rd ed.; American Psychiatric Association, 1980, 1987) diagnoses of dysthymia, the depressive personality was not entirely subsumed by existing mood disorders.  相似文献   
40.
It has recently been claimed (Geiger & Lettvin, 1987; Perry, Dember, Warm, & Sacks, 1989) that the acuity/eccentricity function is flatter in dyslexics than in normal subjects, with dyslexics showing better performance in the periphery and worse performance at fixation. In these studies, all target letters were presented to the right of fixation, a procedural flaw inviting subjects to optimize performance by directing attention and/or gaze to the right of the designated fixation point. It is suggested that dyslexic and normal readers may differ in the degree to which they might adopt the optimal strategy in this situation. To overcome this problem, target letters were briefly presented at 16 randomly intermixed locations derived from the orthogonal combination of four eccentricities and four directions from fixation (above, below, right, left). The accuracy of letter identification declined with increasing eccentricity at the same rate for good and poor adult readers and dyslexic teenagers. This finding provides no support for the view that the acuity/eccentricity function might vary with and possibly cause differences in reading level.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号