全文获取类型
收费全文 | 15573篇 |
免费 | 692篇 |
国内免费 | 8篇 |
专业分类
16273篇 |
出版年
2020年 | 173篇 |
2019年 | 182篇 |
2018年 | 273篇 |
2017年 | 245篇 |
2016年 | 284篇 |
2015年 | 210篇 |
2014年 | 265篇 |
2013年 | 1111篇 |
2012年 | 486篇 |
2011年 | 445篇 |
2010年 | 310篇 |
2009年 | 285篇 |
2008年 | 407篇 |
2007年 | 430篇 |
2006年 | 371篇 |
2005年 | 362篇 |
2004年 | 314篇 |
2003年 | 274篇 |
2002年 | 304篇 |
2001年 | 677篇 |
2000年 | 668篇 |
1999年 | 453篇 |
1998年 | 170篇 |
1997年 | 164篇 |
1996年 | 162篇 |
1995年 | 136篇 |
1992年 | 361篇 |
1991年 | 340篇 |
1990年 | 353篇 |
1989年 | 301篇 |
1988年 | 286篇 |
1987年 | 283篇 |
1986年 | 257篇 |
1985年 | 257篇 |
1984年 | 238篇 |
1983年 | 203篇 |
1982年 | 156篇 |
1979年 | 220篇 |
1978年 | 172篇 |
1977年 | 148篇 |
1975年 | 190篇 |
1974年 | 230篇 |
1973年 | 229篇 |
1972年 | 183篇 |
1971年 | 180篇 |
1970年 | 148篇 |
1969年 | 176篇 |
1968年 | 210篇 |
1967年 | 191篇 |
1966年 | 156篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Unique temporal change is the key to attentional capture 总被引:2,自引:0,他引:2
Abstract— Attentional capture refers to the observation that some events break through and attract one's attention even when one is engaged in a task for which these events are irrelevant. Previous research, focusing primarily on spatial factors, has shown that a new object is more salient in this regard than an abrupt change in an object's features. Here we show that feature changes can be as effective as new objects in capturing attention, provided that they occur during a period of temporal calm. Conversely, both feature changes and new objects are far less effective in capturing attention when they occur simultaneously with other display changes, such as coincident with the initial onset of the display or with small visual transients that occur during a display transition. These results highlight the importance of considering both space and time in studies of attentional capture; the most effective stimulus is unique in both dimensions. 相似文献
992.
993.
Two studies were conducted which created and tested a scale to measure self-righteousness. Self-righteousness was defined as the conviction that one's behaviors or beliefs are correct, especially in contrast to alternate behaviors or beliefs. In the first study, a 4-item scale to measure general self-righteousness was derived which demonstrated adequate levels of internal consistency and was related to dogmatism and ambiguity intolerance. In the second study, the items were worded to be specific to running a race. This study succeeded in demonstrating that the scale possessed predictive validity. This study also demonstrated the usefulness of rewording the general items to make them specific about the content of self-righteousness. 相似文献
994.
16 learning-disabled second- and third-grade students were matched on previous years' achievement scores and grade and assigned at random to experimental and control conditions. Students in the experimental condition were given 8 20-min. sessions of training in test-taking skills particular to the Stanford Achievement Test. Analysis of test scores indicated trained students scored significantly higher on one subtest of a shortened version of the test than students who had not been trained. 相似文献
995.
996.
997.
Despite numerous measures of facets of the body image construct, no single assessment broadly measures a continuum of body image disturbance. Accordingly, this study developed the Body Image Disturbance Questionnaire (BIDQ), derived from the Body Dysmorphic Disorder Questionnaire. Participants were 220 college women and 75 college men who completed an online survey containing this new assessment and established measures of body image and psychosocial functioning. Results confirmed that the Body Image Disturbance Questionnaire was internally consistent and free of impression-management response bias. For both sexes, the measure converged appropriately with other body image indices (evaluation, affect, investment, and impact), was positively correlated with depression, social anxiety, and eating disturbance. Scores on this assessment also predicted psychosocial functioning above and beyond body dissatisfaction as a predictor. Greater body image disturbance was observed among women than men, among heavier than lighter women, and among White than African American women. Limitations and future research implications are discussed. 相似文献
998.
Meta-analysis was used to review and synthesize existing empirical research concerning the career benefits associated with mentoring for the protégé. Both objective (e.g., compensation) and subjective (e.g., career satisfaction) career outcomes were examined. Comparisons of mentored versus nonmemored groups were included, along with relationships between mentoring provided and outcomes. The findings were generally supportive of the benefits associated with mentoring, but effect sizes associated with objective outcomes were small. There was also some indication that the outcomes studied differed in the magnitude of their relationship with the type of mentoring provided (i.e. career or psychosocial). 相似文献
999.
Although the MMPI-2 has been employed since 1989, to date no study has been reported on its use with patients with insomnia. The MMPI-2 was administered to 104 insomnia patients. The T scores of all the MMPI-2 scales fell below the cut-off score of T = 65. Although the group profile was within the normal range, the percentages of patients who had MMPI-2 scores above T = 65 for each scale indicated that a substantial portion of the insomnia patients obtained elevated scores, particularly in the Hs, D, Hy, and Pt scales. Thus, the results suggest that many of the insomnia patients exhibit psychological distress and would benefit from brief psychological interventions, such as sleep hygiene education and relaxation training. In view of the large number of insomnia patients who obtained abnormal MMPI-2 scores, a psychological measure such as the MMPI-2 remains an important assessment tool in identifying insomnia patients who may need extensive psychotherapeutic intervention. 相似文献
1000.
Assessing the Burdens of Leadership: Effects of Formal Leadership Roles on Individual Performance Over Time 总被引:3,自引:0,他引:3
This study adopted a role-based perspective in examining whether changes in performance over time (i.e., dynamic criteria) were a function of changes in individual leadership role responsibilities. Longitudinal data from captains in the modern era of the National Hockey League ( N = 201) were used to test a dynamic criterion hypothesis using multilevel growth modeling. Time ( k = 10) was modeled as a random effect, whereas captain status (i.e., leadership role responsibility) was included as a time-varying covariate. Individual performance was measured as the adjusted points (goals scored plus assists adjusted for individual and historical effects). Results of a series of model building steps that included the examination of alternative complex error structures indicated an overall negative performance trend. Those seasons in which a player assumed formal leadership responsibilities (i.e., team captain) were associated with better performance compared to seasons in which the player had no leadership responsibilities. These results were found to be robust even after controlling for individual performance in the previous season. Results are discussed in terms of the possible positive implications for individual performance and the motivation to lead through developing a culture in which leadership positions are highly valued by the organization, visible to others on the team, and where leadership responsibilities do not interfere with task performance. 相似文献