全文获取类型
收费全文 | 42186篇 |
免费 | 769篇 |
国内免费 | 11篇 |
出版年
2020年 | 210篇 |
2019年 | 211篇 |
2018年 | 3699篇 |
2017年 | 3069篇 |
2016年 | 2528篇 |
2015年 | 413篇 |
2014年 | 376篇 |
2013年 | 1728篇 |
2012年 | 1151篇 |
2011年 | 2961篇 |
2010年 | 2847篇 |
2009年 | 1809篇 |
2008年 | 2197篇 |
2007年 | 2655篇 |
2006年 | 523篇 |
2005年 | 659篇 |
2004年 | 608篇 |
2003年 | 512篇 |
2002年 | 521篇 |
2001年 | 753篇 |
2000年 | 791篇 |
1999年 | 567篇 |
1998年 | 278篇 |
1997年 | 230篇 |
1992年 | 450篇 |
1991年 | 407篇 |
1990年 | 448篇 |
1989年 | 414篇 |
1988年 | 398篇 |
1987年 | 400篇 |
1986年 | 406篇 |
1985年 | 422篇 |
1984年 | 335篇 |
1983年 | 299篇 |
1982年 | 238篇 |
1981年 | 213篇 |
1979年 | 386篇 |
1978年 | 279篇 |
1977年 | 251篇 |
1976年 | 223篇 |
1975年 | 341篇 |
1974年 | 373篇 |
1973年 | 351篇 |
1972年 | 328篇 |
1971年 | 287篇 |
1970年 | 260篇 |
1969年 | 322篇 |
1968年 | 358篇 |
1967年 | 321篇 |
1966年 | 326篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
To test Coyne's (1976b) theory of depression, students' levels of depressive symptoms, reassurance seeking, and self-esteem were assessed at Time 1, and their same-gender roommates' appraisals of them were assessed 5 weeks later. Mildly depressed students engaged in the type of reassurance seeking described by Coyne. Among men, but not women, mildly depressed students were rejected if they strongly sought reassurance and had low self-esteem but not if they did not seek reassurance or had high self-esteem. Although induction of depressed symptoms in roommates did occur, this contagion effect did not account for the depression-rejection relationship. The prediction that unsupportive, intolerant, or unempathic others would be particularly likely to respond with rejection to reassurance-seeking depressed students with low self-esteem received partial support. Implications for future work on the interpersonal aspects of depression are discussed. 相似文献
162.
Z Solomon M Waysman G Levy B Fried M Mikulincer R Benbenishty V Florian A Bleich 《Family process》1992,31(3):289-302
While the long-term effects of combat trauma on veterans have been studied extensively, its impact on veterans' wives has yet to be investigated. This study examined the implications of combat-induced psychopathology--wartime combat stress reaction (CSR) and current posttraumatic stress disorder (PTSD)--in a sample of 205 wives of Israeli combat veterans of the 1982 Lebanon war. Results show that both CSR and PTSD were associated with increased psychiatric symptoms in the wives. In addition, current PTSD was particularly found to contribute to impaired social relations among veterans' wives in a broad range of contexts, from inner feelings of loneliness, through impaired marital and family relations, and extending to the wider social network. Implications of these findings for treatment and further research are discussed. 相似文献
163.
LYMAN C. WYNNE M.D. Ph.D. CLEVELAND G. SHIELDS Ph.D. MARK I. SIRKIN Ph.D. 《Family process》1992,31(1):3-18
This article examines and clarifies controversies about the concept of illness in the field of family therapy. We contend that illness, as traditionally understood in all cultures, is a relational, transactional concept that is highly congruent with core principles of present-day family theories. Family therapists need not buy into a biotechnical, reductionistic reframing of illness as disease. Rather, it is more appropriate to conceptualize and work with illness as a narrative placed in a biopsychosocial context. Such a narrative includes how shared responsibility for coping and for finding solutions can take place, without becoming involved in disputes about causal models. 相似文献
164.
165.
This study examined the career aspirations of pregnant teens enrolled in a program designed to minimize their chances of dropping out of high school. The teens completed a demographic data form that included questions on their career aspirations. The data were coded by Holland type using the Dictionary of Holland Occupational Codes. Trends were discussed in light of the future labor market and critical need for career counseling for this at-risk population. 相似文献
166.
A recent paper by Kail (1988) in this journal appears to contain a significant error in the data analysis. The "goodness-of-fit" coefficients reported which suggest that overall about 94% of the variance can be accounted for by the model seem to be a substantial overestimation as a result of inappropriate procedures for statistical modeling. Using the data made available to us by Kail, we have reanalyzed these results. The corrected values range from 0.9 to 92.1% for the individual tasks with an overall average between 40 and 60%. We suggest that the support for the original conclusions is considerably weaker than reported. 相似文献
167.
168.
169.
The influence of information feedback on the learning of a multiple-degree-of-freedom activity, the overhand throw, was investigated. During learning, feedback was presented in the form of knowledge of results, knowledge of performance, knowledge of performance with attention-focusing cues, or knowledge of performance with error-correcting transitional information. Across 12 practice sessions, performance was assessed with respect to both throwing distance and throwing form. Subjects provided with knowledge of performance along with transitional information demonstrated significant gains in throwing distance, compared with subjects receiving knowledge of performance or knowledge of results alone. Movement form ratings followed the same trend. Providing learners with cues to focus their attention on the relevant aspects of knowledge of performance or directly providing transitional information was a better aid to the acquisition of throwing form than providing knowledge of results or knowledge of performance alone. These results support the hypothesis that knowledge of results may not be the most potent form of feedback in multiple-degree-of-freedom activities and that knowledge of performance, when combined with additional information, can lead to significant gains in skill acquisition. 相似文献
170.
This study reanalyzes kinematically (via film) the pre- and postoperative locomotor behavior of 4 of the 10 monkeys with partial spinal cord lesions (T8) briefly described by Eidelberg, Walden, and Nguyen (1981). The behavior of the remaining 6 monkeys is qualitatively described. The analysis reveals that 5 of the animals initially exhibited unilateral hind limb stepping. Hind and forelimb cycle durations often differed postoperatively; the hind limbs commonly showed increased values, whereas forelimb cycle durations were reduced: ipsilateral interlimb phase values were usually inconsistent. A review of prior studies of primate spinal cord lesions indicates that sparing of the ventrolateral quadrant may not be essential for locomotor recovery (cf. Eidelberg, Walden, & Nguyen, 1981). Furthermore, this review as well as the kinematic analysis indicates that primates with very significant spinal lesions can stilI exhibit locomotor movements. Thus, although the primate's spinal cord seems less able than other mammals' to readily organize locomotor movements (Eidelberg, Walden, & Nguyen, 1981), the total absence of stepping in primates with completely transected cords is unexpected and warrants further research. 相似文献