全文获取类型
收费全文 | 312篇 |
免费 | 31篇 |
国内免费 | 16篇 |
专业分类
359篇 |
出版年
2023年 | 4篇 |
2022年 | 3篇 |
2021年 | 10篇 |
2020年 | 20篇 |
2019年 | 8篇 |
2018年 | 9篇 |
2017年 | 11篇 |
2016年 | 19篇 |
2015年 | 10篇 |
2014年 | 12篇 |
2013年 | 44篇 |
2012年 | 12篇 |
2011年 | 21篇 |
2010年 | 14篇 |
2009年 | 20篇 |
2008年 | 27篇 |
2007年 | 26篇 |
2006年 | 15篇 |
2005年 | 11篇 |
2004年 | 11篇 |
2003年 | 10篇 |
2002年 | 7篇 |
2001年 | 8篇 |
2000年 | 4篇 |
1999年 | 3篇 |
1996年 | 3篇 |
1995年 | 3篇 |
1993年 | 1篇 |
1991年 | 1篇 |
1985年 | 1篇 |
1983年 | 1篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1979年 | 3篇 |
1978年 | 2篇 |
1976年 | 1篇 |
1975年 | 1篇 |
排序方式: 共有359条查询结果,搜索用时 0 毫秒
51.
The English plural is about the number of individuals in a set of like kinds. Two-year-old children use the plural but do not do so in all obligatory contexts. The present report asks whether the limitations on their production of the plural are related to aspects of meaning. In two Experiments plural productions were elicited from 2-year-old children for sets of size two and four and for instances of basic-level categories that were either similar or identical. Children were much more likely to produce the plural of these well-known nouns when there were four rather than two and when the instances were identical rather than merely similar. The results provide new evidence on children's acquisition of the English plural, showing that children's early productions are not just limited by knowledge of the noun and its plural form but also is limited by properties of the labeled sets in ways that are relevant to the underlying meaning of the plural. 相似文献
52.
Graduate employment status and health: a longitudinal analysis of the transition from student 总被引:2,自引:0,他引:2
The prevalence of unemployment and underemployment was explored longitudinally in 248 recent graduates (73 males and 175 females)
over an 18–24 month transition from final year student to 9–12 months post-graduation. Over this period changes in levels
of psychological distress, health behaviours, social support, optimism and achievement motivation were measured. Results show
that both unemployment and underemployment have deleterious effects on psychological and physical health, social support,
optimism and achievement motivation.
相似文献
Tony CassidyEmail: |
53.
Sean P. Cumming Ronald E. Smith Frank L. Smoll Martyn Standage Joel R. Grossbard 《Psychology of sport and exercise》2008,9(5):686-703
ObjectiveThe objective was to develop and validate an achievement goal scale for young athletes that was aligned with the 2 (mastery/ego)×2 (approach/avoidance) achievement goal framework.MethodA total of 1675 male and female athletes ranging in age from 9 to 14 years participated in the AGSYS scale development and validation phases. Items having a readability level of grade 4 (age 9) or below were written and evaluated in a series of studies to assess the reliability, factorial validity, and construct validity of the Mastery and Ego scales.DesignBoth correlational and experimental methods were used to assess reliability and validity.ResultsExploratory and confirmatory factor analyses demonstrated factorial validity in samples of 9–10-, 11–12-, and 13–14-year-old athletes, and the subscales correlated in a predicted fashion with one another, with other sport and academic goal orientation measures and with several other theoretically relevant variables, including coach-initiated motivational climate, competitive trait anxiety, sport enjoyment, motivation, and self-esteem. Scores also changed significantly in response to a motivational climate coach intervention.ConclusionThe Achievement Goal Scale for Youth Sports (AGSYS) appears to be a reliable and valid measure of achievement goal approach orientations in children between the ages of 9 and 14 years. We were not successful in developing corresponding avoidance goal orientation scales that were not highly correlated, raising the possibility that children do not cognitively differentiate between mastery-avoidance and ego-avoidance orientations. 相似文献
54.
Many recent studies have examined the association between number acuity, which is the ability to rapidly and non-symbolically estimate the quantity of items appearing in a scene, and symbolic math performance. However, various contradictory results have been reported. To comprehensively evaluate the association between number acuity and symbolic math performance, we conduct a meta-analysis to synthesize the results observed in previous studies. First, a meta-analysis of cross-sectional studies (36 samples, N = 4705) revealed a significant positive correlation between these skills (r = 0.20, 95% CI = [0.14, 0.26]); the association remained after considering other potential moderators (e.g., whether general cognitive abilities were controlled). Moreover, a meta-analysis of longitudinal studies revealed 1) that number acuity may prospectively predict later math performance (r = 0.24, 95% CI = [0.11, 0.37]; 6 samples) and 2) that number acuity is retrospectively correlated to early math performance as well (r = 0.17, 95% CI = [0.07, 0.26]; 5 samples). In summary, these pieces of evidence demonstrate a moderate but statistically significant association between number acuity and math performance. Based on the estimated effect sizes, power analyses were conducted, which suggested that many previous studies were underpowered due to small sample sizes. This may account for the disparity between findings in the literature, at least in part. Finally, the theoretical and practical implications of our meta-analytic findings are presented, and future research questions are discussed. 相似文献
55.
Quality child care supports the achievement of low-income children: Direct and indirect pathways through caregiving and the home environment 总被引:2,自引:0,他引:2
Kathleen McCartney Eric Dearing Beck A. Taylor Kristen L. Bub 《Journal of applied developmental psychology》2007,28(5-6):411
Existing studies of child care have not been able to determine whether higher quality child care protects children from the effects of poverty, whether poverty and lower quality child care operate as dual risk factors, or whether both are true. The objective of the current study was to test two pathways through which child care may serve as a naturally occurring intervention for low-income children: a direct pathway through child care quality to child outcomes, and an indirect pathway through improvements in the home environment. Children were observed in their homes and child care settings at 6, 15, 24, and 36 months. An interaction between family income-to-needs ratio and child care quality predicted School Readiness, Receptive Language, and Expressive Language, as well as improvements in the home environment. Children from low-income families profited from observed learning supports in the form of sensitive care and stimulation of cognitive development, and their parents profited from unobserved informal and formal parent supports. Policy implications are discussed. 相似文献
56.
目的:编制高考考生学校决策问卷。方法:对400名大学一年级新生入学一周后进行了测量,通过项目分析、探索性因素分析、验证性因素分析、信度分析等方法对量表的结构效度、和信度进行了检验。结果:问卷的总体内部一致性系数为0.911(n=392,p〈0.01)。探索性因素分析发现,所有项目因子载荷都在0.570-0.833之间,四个因子解释方差比率总计69.55%。验证性因素分析显示NNFI、CFI、RMSEA指数分别为0.95,0.96,0.090。结论:高考生学校决策问卷具有较好的信度和效度,是评定高考生学校决策的有效工具。 相似文献
57.
本研究通过前测-训练-后测的实验程序,对22名五年级小学生和29名大学一年级学生在不同测查条件下知觉英语辅音/s/和/θ/的可塑性情况进行了考察和比较。两个年龄阶段被试在前后测中均接受纯听、视听一致、视听不一致和纯视条件下的测查,训练时两个年龄阶段被试中分别有一半接受纯听训练,另一半接受视听训练,训练时间历时10天,每天30分钟左右。对训练效果的分析发现:(1)接受纯听和视听训练的五年级学生在纯视测查条件下知觉英语辅音/s/和/θ/的提高率有显著差异,视听训练被试显著高于纯听训练被试,在其他条件下没有显著差异;(2)接受两种训练的大学生在所有条件下知觉英语辅音/s/和/θ/的提高率都没有显著差异。说明儿童表现出了更强的视听双通道语音知觉的可塑性。 相似文献
58.
Katariina Salmela-Aro Asko Tolvanen Jari-Erik Nurmi 《Journal of Vocational Behavior》2009,75(2):162-172
To examine whether individuals’ achievement strategies measured during university studies would have an impact on work burnout and work engagement measured 10, 14 and 17 years later, 292 university students completed the SAQ strategy questionnaire three times while at university, and the work burnout inventory three times and work engagement inventory twice during their early career. The results showed that optimism increased during university, while task-avoidance did not change. Moreover, high and increasing optimism during university predicted a high level of work engagement and low level of burnout 10, 14 and 17 years later. By contrast, a high level of task-avoidance during university predicted a low level of work engagement and high level of burnout during the early career. 相似文献
59.
60.
Using a name-based categorization task, Nazzi found in 2005 that French-learning 20-month-olds can make use of one-feature consonantal contrasts between new labels but fail to do so with one-feature vocalic contrasts. This asymmetry was interpreted as developmental evidence for the proposal that consonants play a more important role than vowels at the lexical level. In the current study using the same task, we first show that by 30 months French-learning infants can make use of one-feature vocalic contrasts (e.g., /pize/–/pyze/). Second, we show that in a situation where infants must neglect either a consonantal one-feature change or a vocalic one-feature change (e.g., match a /pide/ with either a /tide/ or a /pyde/), both French- and English-learning 30-month-olds choose to neglect the vocalic change rather than the consonantal change. We argue that these results suggest that by 30 months of age, infants still give less weight to vocalic information than to consonantal information in a lexically related task even though they are able to process fine vocalic information. 相似文献