全文获取类型
收费全文 | 2536篇 |
免费 | 491篇 |
国内免费 | 52篇 |
出版年
2023年 | 11篇 |
2022年 | 10篇 |
2021年 | 50篇 |
2020年 | 21篇 |
2019年 | 150篇 |
2018年 | 161篇 |
2017年 | 175篇 |
2016年 | 119篇 |
2015年 | 101篇 |
2014年 | 65篇 |
2013年 | 146篇 |
2012年 | 41篇 |
2011年 | 57篇 |
2010年 | 30篇 |
2009年 | 52篇 |
2008年 | 45篇 |
2007年 | 41篇 |
2006年 | 35篇 |
2005年 | 28篇 |
2004年 | 23篇 |
2003年 | 20篇 |
2002年 | 21篇 |
2001年 | 16篇 |
2000年 | 13篇 |
1999年 | 10篇 |
1998年 | 13篇 |
1997年 | 9篇 |
1996年 | 2篇 |
1995年 | 10篇 |
1994年 | 4篇 |
1993年 | 4篇 |
1992年 | 4篇 |
1991年 | 4篇 |
1990年 | 5篇 |
1989年 | 2篇 |
1987年 | 4篇 |
1986年 | 1篇 |
1985年 | 139篇 |
1984年 | 144篇 |
1983年 | 126篇 |
1982年 | 155篇 |
1981年 | 122篇 |
1980年 | 159篇 |
1979年 | 145篇 |
1978年 | 139篇 |
1977年 | 100篇 |
1976年 | 108篇 |
1975年 | 73篇 |
1974年 | 88篇 |
1973年 | 77篇 |
排序方式: 共有3079条查询结果,搜索用时 15 毫秒
141.
142.
143.
Individual and organizational correlates of employees who refuse seniority-based promotions in union lines of progression are examined. The sample consisted of 313 production employees of a large manufacturing complex. Correlational and discriminant analyses revealed that age, being female, and number of employees in the department related positively to promotion refusal, while years of education and pay showed a negative relationship. Of these variables, years of education was the strongest predictor. Potential explanations for the results relate to stress avoidance, perceived inabilities, and equity theory. Areas for future research are suggested. 相似文献
144.
A 39-year-old male presenting with a 5 year history of excessive urinary frequency and urgency was treated first with scheduling of urination, use of external urinary catheter and progressive muscular relaxation and then with a urinary retention training procedure. After the first set of procedures, urinary frequency decreased, whereas urgency increased slightly. After completion of retention training, both symptoms were alleviated. Overall, urinary frequency decreased from a baseline average of 14 urinations daily to a post-treatment average of 6.5 urinations per day. Urinary urgency decreased from a baseline average of 35 urges per day to a post-treatment average of 9.3 urges per day. Gains were maintained at 3 and 5 month follow-up. 相似文献
145.
Four experiments examined the conceptual organization of narrative passages and the extent to which these representations were explanatory in a variety of experimental tasks. The conceptual representation of a passage consisted of a graph of labeled nodes and labeled, directed arcs which were adopted from the Conceptual Dependency Theory. These representations included both explicitly stated information and inferences which had been empirically extracted by a question-answering procedure. Symbolic procedures for answering how- and why-questions were also delineated. The conceptual representations and the symbolic procedures that operate on these representations together accounted for 91% of the answers generated from question-answering protocols in Experiment 1, and also the rated quality of specific answers to specific questions in Experiment 2. Experiments 3 and 4 supported the hypothesis that structural properties of the representations can predict recall of explicitly stated nodes and verification ratings of inference nodes. The results provide encouraging support for the proposed graphic representations and also for the use of question-answering protocols in uncovering prose inferences. 相似文献
146.
147.
148.
149.
Friedrich Wilkening 《Cognitive psychology》1981,13(2):231-247
The development of understanding the relationships between velocity, time, and distance was investigated in three tasks. In each task, values of two dimensions were given, and 5-year-olds, 10-year-olds, and adults had to infer values of the third dimension. These inferences were made in all age groups. The integration rules were found to depend upon age and task. In the distance = time × velocity task, all age groups obeyed the normative multiplication rule. In the time = distance ÷ velocity task, the two older age groups obeyed the normative division rule, but the 5-year-olds shifted to a simpler subtraction rule. In the velocity = distance ÷ time task, which was the most difficult, the two older age groups simplified to use of a subtraction rule, and the 5-year-olds simplified even further to use of a distance-only rule. The knowledge level revealed for young children contrasts sharply with results from previous studies using Piagetian choice tasks, which apparently investigate selective attention to one dimension rather than conceptual understanding of relations. 相似文献
150.
Randall W Engle Dorothy S Fidler Linda H Reynolds 《Journal of experimental child psychology》1981,32(3):459-473
A series of experiments is reported on the stimulus suffix effect with the primary variables being age of the subject (7 and 11 years), rate of presentation, and list length. While the suffix effect was larger for younger subjects at a slow rate of presentation, the effect was nearly identical across age groups with a fast presentation rate. It was concluded that when the contaminating effects of more central processes are reduced, there is no developmental change in the capacity of echoic memory. An interesting effect of rate of presentation is reported with younger subjects performing better at faster rates of presentation and adults performing better at slower rates. 相似文献