全文获取类型
收费全文 | 21974篇 |
免费 | 319篇 |
国内免费 | 19篇 |
专业分类
教育 | 15297篇 |
科学研究 | 2562篇 |
各国文化 | 165篇 |
体育 | 1666篇 |
综合类 | 19篇 |
文化理论 | 243篇 |
信息传播 | 2360篇 |
出版年
2022年 | 168篇 |
2021年 | 249篇 |
2020年 | 368篇 |
2019年 | 522篇 |
2018年 | 763篇 |
2017年 | 747篇 |
2016年 | 715篇 |
2015年 | 432篇 |
2014年 | 648篇 |
2013年 | 3677篇 |
2012年 | 538篇 |
2011年 | 534篇 |
2010年 | 502篇 |
2009年 | 442篇 |
2008年 | 491篇 |
2007年 | 463篇 |
2006年 | 420篇 |
2005年 | 368篇 |
2004年 | 410篇 |
2003年 | 346篇 |
2002年 | 359篇 |
2001年 | 468篇 |
2000年 | 505篇 |
1999年 | 403篇 |
1998年 | 228篇 |
1997年 | 291篇 |
1996年 | 262篇 |
1995年 | 195篇 |
1994年 | 220篇 |
1993年 | 180篇 |
1992年 | 340篇 |
1991年 | 301篇 |
1990年 | 319篇 |
1989年 | 334篇 |
1988年 | 299篇 |
1987年 | 280篇 |
1986年 | 265篇 |
1985年 | 314篇 |
1984年 | 235篇 |
1983年 | 218篇 |
1982年 | 189篇 |
1981年 | 174篇 |
1980年 | 170篇 |
1979年 | 272篇 |
1978年 | 192篇 |
1977年 | 172篇 |
1976年 | 140篇 |
1975年 | 137篇 |
1974年 | 152篇 |
1973年 | 147篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
981.
982.
We statistically controlled fitness (1.5-mile run), outcome-expectancy values, and perceived barriers for physical activity and then compared internal health locus of control (IHLOC) with internal exercise locus of control (IEXLOC) for predicting the physical activity of college students (N = 84). Prospective observations of self-reported free-living physical activity (seven-day recall) and supervised running (time x distance) were made at 2-, 5-, and 9-week intervals. IHLOC predicted seven-day recall at Week 2 (beta = .19) and Week 5 (beta = .36) (increase in adjusted R2 ranged from .05 to .12, p less than .05). Consistent with theory, the prediction was not reproducible when generalized outcome-expectancy value rather than outcome-expectancy value for health was assessed. IHLOC was unrelated to supervised running. IEXLOC was unrelated to activity in all analyses, even though exercise-specific measures of outcome-expectancy values (beta s = .20) and perceived barriers (beta s = .27-.32) predicted both seven-day recall and supervised running (p less than .05). IHLOC also discriminated (p less than .05) high active and low active subjects when criterion groups were formed from population norms on seven-day recall (greater than or less than 280 kcal.kg-1.week-1). Results indicate that tests of decision theories that include locus of control measures specific to health or exercise must adjust for fitness, perceived barriers to physical activity, and behaviorally relevant outcome-expectancy values of physical activity when studying college students. The construct validity of exercise locus of control remains uncertain for college students. 相似文献
983.
984.
985.
986.
987.
988.
989.
Lynn S. Liben 《Child development》2008,79(6):1600-1605
This article introduces a collection of essays on continuity and discontinuity in cognitive development. In his lead essay, J. Kagan (2008) argues that limitations in past research (e.g., on number concepts, physical solidarity, and object permanence) render conclusions about continuity premature. Commentaries respectively (1) argue that longitudinal contexts are essential for interpreting developmental data, (2) illustrate the value of converging measures, (3) identify qualitative change via dynamical systems theory, (4) redirect the focus from states to process, and (5) review epistemological premises of alternative research traditions. Following an overview of the essays, this introductory article discusses how the search for developmental structures, continuity, and process differs between mechanistic‐contextualist and organismic‐contextualist metatheoretical frameworks, and closes by highlighting continuities in Kagan’s scholarship over the past half century. 相似文献
990.