全文获取类型
收费全文 | 120889篇 |
免费 | 1608篇 |
国内免费 | 252篇 |
专业分类
教育 | 83938篇 |
科学研究 | 13467篇 |
各国文化 | 1972篇 |
体育 | 9070篇 |
综合类 | 173篇 |
文化理论 | 1047篇 |
信息传播 | 13082篇 |
出版年
2021年 | 941篇 |
2020年 | 1636篇 |
2019年 | 2541篇 |
2018年 | 3015篇 |
2017年 | 3294篇 |
2016年 | 3359篇 |
2015年 | 2316篇 |
2014年 | 3183篇 |
2013年 | 27185篇 |
2012年 | 2298篇 |
2011年 | 2627篇 |
2010年 | 2295篇 |
2009年 | 2602篇 |
2008年 | 2319篇 |
2007年 | 2035篇 |
2006年 | 2305篇 |
2005年 | 2283篇 |
2004年 | 2956篇 |
2003年 | 2294篇 |
2002年 | 2098篇 |
2001年 | 1956篇 |
2000年 | 1617篇 |
1999年 | 1503篇 |
1998年 | 1449篇 |
1997年 | 1511篇 |
1996年 | 1687篇 |
1995年 | 1460篇 |
1994年 | 1458篇 |
1993年 | 1460篇 |
1992年 | 1454篇 |
1991年 | 1365篇 |
1990年 | 1354篇 |
1989年 | 1263篇 |
1988年 | 1152篇 |
1987年 | 1061篇 |
1986年 | 1112篇 |
1985年 | 1369篇 |
1984年 | 1248篇 |
1983年 | 1262篇 |
1982年 | 1242篇 |
1981年 | 1161篇 |
1980年 | 1147篇 |
1979年 | 1198篇 |
1978年 | 1185篇 |
1977年 | 1109篇 |
1976年 | 985篇 |
1975年 | 789篇 |
1974年 | 786篇 |
1973年 | 756篇 |
1971年 | 600篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
981.
A group of 633 college students at a large midwestern public university was asked fifteen questions pertaining to personal long-term course planning. The results indicated that only 48% of the students sketched out a tentative listing of at least two courses per term for one or more subsequent semesters when first planning courses for the current semester. Long-range planning was positively correlated with the number of years students had already spent in college and with students' perception of the following factors: course planning utility, degree of certainty about pursuing one's current first choice of career, and degree of commitment in using college coursework as a means of achieving a career goal (all p < 0.001). Long-range planning was negatively correlated with the anticipation of a possible change in academic interests. Such planning was not significantly correlated with students' entrance examination aptitude scores or grade point averages. Thus, students' long-range planning of courses was associated more strongly with career commitment than with recent academic performance or aptitude. 相似文献
982.
Kees P. Van den Bos Johannes Kingma 《European Journal of Psychology of Education - EJPE》1987,1(4):45-59
An 11-parameter Markov model of stages of learning, which was developed by Brainerd et al., will be presented. The focus will be on parameter interpretation in terms of long-term memory (LTM) processes. Next the model will be used to examine the contribution of these various LTM processes to Schooltype and Age differences in a word-pair memorization experiment. Subjects were 8 and 11-year-old normal-achieving (NA) children from regular elementary schools and 8 and 11-year-old children from special schools for learning disabled (LD) children. One of the main conclusions is that the Schooltype × Age interaction which was demonstrated for traditional performance measures, can be explained by LD children's little developmental progress in storage processes and deviations from normal development in aspects of the acquisition of retrieval algorithms. No deficiences were, however, detected in the LD children's rerention ability early in the task, and in the so-called heuristic retrieval operations. 相似文献
983.
984.
985.
986.
Mechanisms of the relation between perinatal problems, early childhood illness, and psychopathology in late childhood and adolescence 总被引:6,自引:0,他引:6
Data on perinatal and early childhood somatic and psychological risk factors of a random sample of children were gathered in early to middle childhood and employed to examine the long-term risk of emotional and behavioral problems of late childhood and adolescence. 3 issues were addressed: First, can syndromic specificity of such effects be identified on scaled and diagnostic measures of syndromes? Second, are these effects attributable to excess risk of low-income children for both perinatal and later childhood problems? Third, are the intervening mechanisms identifiable as intellectual impairment, vulnerability to poor health, poor maternal caretaking, maternal rejection, or maternal stress associated with marital problems? Findings indicated that elevated risk was present for all syndromes, both at the scale level and at the diagnostic level. None of the examined intervening mechanisms fully accounted for the effects of early risks. 相似文献
987.
Genetic and environmental origins of individual differences in masculine and feminine personality attributes were investigated in a sample of 38 monozygotic and 32 dizygotic twin pairs (total N = 140) during pre- and early adolescence. Self-report measures of both masculine and feminine characteristics were obtained for each child using 2 standardized instruments: the Children's Personality Attributes Questionnaire (CPAQ) and the Adolescent Self-Perception Inventory (ASPI). Multivariate biometrical analyses revealed significant genetic influences in all measures, accounting for 20%-48% of the observed variation in each. Environmental influences, which explained the remaining 52%-80% of variance in masculinity and femininity, were apparently specific to each individual and not shared by members of the same twin pair. The results underscore the importance of considering both genetic and environmental factors in gender-role development, particularly in studies of family resemblance. 相似文献
988.
989.
Robert B. Bums 《The Australian Educational Researcher》1989,16(4):69-78
One hundred and eighty-one teacher training students sat three attitude measuring instruments to investigate the relationships between attitudes to self, attitudes to others and attitudes to educational practices. Clinical studies within the ambit of Rogerian psychotherapy suggest that a relationship between self and other attitudes should be positive. Substantial and statistically significant positive correlations, in the order of p<0.01, emerged consistently in this study between attitudes to self and attitudes to a range of others and to progressive child centred educational practices. Self acceptance level would seem to be an index of attitudes to a wide range of others. This relationship provides a principle of utmost importance for human relationships since the application of psychological processes to enhance the self concept should facilitate as a corollary a decrease in interpersonal tensions and inter group conflict. This relationship is of particular consequence in the teaching context since teaching is a sharing of self with others. The results of the study suggest that those with low self acceptance prefer (p<0.01) to avoid close encounters with pupils and prefer a more traditional formal teaching style. 相似文献
990.
Changes in affect toward a particular stimulus can take place very rapidly through Pavlovian conditioning, if presentation of the conditioned stimulus (CS+) paired with the unconditioned stimulus (US) is accompanied by presentation of a “CS?,” another value of the same dimension as the CS+ but not paired with a US. This effect has considerable generality. It has been observed in terms of both olfactory and visual CSs, in terms of appetitive as well as aversive conditioning, and for adult as well as infant rats. The CS? effect has seemed especially important for infants, which may be related to the general tendency for infants to exhibit less stimulus selection than older animals. Finally, the CS? effect has enabled the development of a simple test of short-term retention that can quite effectively assess memory for either incidental or target events. These tests so far have indicated a clear ontogenetic decrease in rate of forgetting over short intervals, corresponding to the well-known development-related decrease in forgetting over long intervals (infantile amnesia). The tests also have shown that short-term forgetting of intentional and target events is surprisingly similar, with some indication of more rapid forgetting for the incidental events. Alternative interpretations of the CS? effect and some preliminary tests of these interpretations are discussed. 相似文献