全文获取类型
收费全文 | 31666篇 |
免费 | 516篇 |
国内免费 | 6篇 |
专业分类
32188篇 |
出版年
2023年 | 68篇 |
2022年 | 62篇 |
2021年 | 123篇 |
2020年 | 221篇 |
2019年 | 256篇 |
2018年 | 3715篇 |
2017年 | 3036篇 |
2016年 | 2536篇 |
2015年 | 429篇 |
2014年 | 404篇 |
2013年 | 1371篇 |
2012年 | 1106篇 |
2011年 | 2849篇 |
2010年 | 2838篇 |
2009年 | 1825篇 |
2008年 | 2204篇 |
2007年 | 2635篇 |
2006年 | 519篇 |
2005年 | 630篇 |
2004年 | 622篇 |
2003年 | 526篇 |
2002年 | 468篇 |
2001年 | 206篇 |
2000年 | 243篇 |
1999年 | 199篇 |
1998年 | 205篇 |
1997年 | 173篇 |
1996年 | 113篇 |
1995年 | 146篇 |
1994年 | 145篇 |
1993年 | 131篇 |
1992年 | 125篇 |
1991年 | 111篇 |
1990年 | 118篇 |
1989年 | 106篇 |
1988年 | 111篇 |
1987年 | 108篇 |
1986年 | 85篇 |
1985年 | 101篇 |
1984年 | 116篇 |
1983年 | 97篇 |
1982年 | 110篇 |
1981年 | 115篇 |
1980年 | 104篇 |
1979年 | 102篇 |
1978年 | 110篇 |
1977年 | 89篇 |
1976年 | 94篇 |
1975年 | 64篇 |
1974年 | 76篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
911.
912.
913.
This paper reports the results of a two-sample study—a sample of medical reps from pharmaceutical companies (N = 232) and a sample of respondents from multiple organizations (N = 221)—of the relationships between pay satisfaction, organizational commitment, and turnover intentions. Hypotheses were
tested using a multidimensional perspective on both pay satisfaction and organizational commitment. Results from both samples
show that the effect of pay satisfaction on intended turnover is fully mediated by affective commitment and perceived sacrifice
commitment. Pay satisfaction is also significantly related to normative commitment but the latter has no influence on the
outcome. Finally, in the sample of medical reps, pay satisfaction significantly reduces commitment based on lack of employment
alternatives, a finding that is interpreted in light of the characteristics of pay systems in pharmaceutical companies. Future
directions on compensation satisfaction and commitment research are discussed. 相似文献
914.
In a running memory span task, the participants are presented with a list of items (e.g. numbers or words) of an unknown length, because this length varies from trial to trial. In one variation of the procedure the participants must report a certain fixed number of items (e.g. four) from the end of the list. According to Morris and Jones (British Journal of Psychology, 81, 111-121, 1990), the recalled items must be updated in memory as the presentation of the list progresses. Ruiz, Elosúa and Lechuga (The Quarterly Journal of Experimental Psychology, 5, 887-905, 2005) noted that an active strategy implies an inhibition in memory of the final discarded items, and did not find results which supported this hypothesis. The aim of this study is to check whether or not participants adopt an active processing strategy in extreme conditions. Experiment 1 uses catch trials, which induce the participants not to discard the first items of the lists, and also short lists (of 4, 7, 8, 9 and 10 items); these could be considered optimal conditions for updating. However, it should also be pointed out that with an upper limit of 10 items per list, participants could try to memorise the whole list in most of the trials. One way to discourage this strategy is including lists well over span (e.g. 14-26 items). The purpose of Experiment 2 was to analyse the 10-item lists in two conditions: within a context of much longer lists (well over span) in most of the trials and within a context of shorter lists (data of Experiment 1). Results in both experiments, from the analysis of location errors, indicate that even in these conditions the participants do not seem to carry out the supposed active updating of the memory set. 相似文献
915.
The present study examined threat interpretation biases in children 7-12 years of age with separation, social and generalised anxiety disorders (N=15), non-anxious offspring at risk due to parental anxiety (N=16) and non-anxious controls of non-anxious parents (N=14). Children provided interpretations of ambiguous situations to assess cognitive, emotional and behavioural responses. In comparison with non-anxious control children and at-risk children who did not differ from each other, anxious children reported stronger negative emotion and less ability to influence ambiguous situations. These results suggest that threat interpretation bias may be a cognitive factor associated with ongoing childhood anxiety but not a vulnerability factor associated with parental anxiety. 相似文献
916.
Both researchers and practitioners need to know more about how laboratory treatment protocols translate to real-world practice settings and how clinical innovations can be systematically tested and communicated to a skeptical scientific community. The single-case time-series study is well suited to opening a productive discourse between practice and laboratory. The appeal of case-based time-series studies, with multiple observations both before and after treatment, is that they enrich our design palette by providing the discipline another way to expand its empirical reach to practice settings and its subject matter to the contingencies of individual change. This article is a user's guide to conducting empirically respectable case-based time-series studies in a clinical practice or laboratory setting. 相似文献
917.
Previous research indicated that most salient, real-world objects possess natural regularities that observers commonly assume in perceptual judgments of figural orientation and interpretation. Regularities include 3-dimensionality, bilateral symmetry, and the tendency for object tops to possess more salient information than bottoms. Thus, when observers interpret randomly shaped figures, they reliably impose volume, bilateral symmetry, and top and front orientation directions, even when figures are 2-dimensional and asymmetric. We confirmed generalizability for observers to assume these regularities with stimuli that vary in complexity, and we found evidence supporting another regularity, that of symmetry verticality (symmetry about a vertical axis). Findings support use of a family of perceptual heuristics corresponding to natural regularities that constrain stimulus indeterminacy and help guide judgment of object orientation and interpretation. 相似文献
918.
919.
McDaniel and Einstein (2007) argued that prospective memories can be retrieved through spontaneous retrieval processes stimulated
by the presence of a target cue. To test this claim, we investigated whether presenting a prospective memory cue during a
task that did not require an intention to be performed spontaneously triggered remembering of that intention. In two experiments,
participants performed an image-rating task in which a prospective memory task (to press the “Q” key when a target word appeared)
was embedded. Then, participants were told that their intention was finished or suspended. Finally, participants performed
a lexical decision task in which each target (and a matched control) word appeared. RTs were slower to target words than to
control words when the intention was suspended but not when it was finished. These results suggest that target cues associated
with suspended intentions can spontaneously trigger remembering but that finished intentions are quickly deactivated. 相似文献
920.