全文获取类型
收费全文 | 21477篇 |
免费 | 49篇 |
专业分类
21526篇 |
出版年
2023年 | 9篇 |
2021年 | 9篇 |
2020年 | 24篇 |
2019年 | 27篇 |
2018年 | 3520篇 |
2017年 | 2835篇 |
2016年 | 2270篇 |
2015年 | 204篇 |
2014年 | 109篇 |
2013年 | 226篇 |
2012年 | 599篇 |
2011年 | 2425篇 |
2010年 | 2539篇 |
2009年 | 1503篇 |
2008年 | 1732篇 |
2007年 | 2201篇 |
2006年 | 67篇 |
2005年 | 240篇 |
2004年 | 207篇 |
2003年 | 153篇 |
2002年 | 91篇 |
2001年 | 42篇 |
2000年 | 67篇 |
1999年 | 25篇 |
1998年 | 40篇 |
1997年 | 34篇 |
1996年 | 25篇 |
1995年 | 13篇 |
1994年 | 11篇 |
1993年 | 18篇 |
1992年 | 12篇 |
1991年 | 13篇 |
1990年 | 16篇 |
1989年 | 9篇 |
1988年 | 8篇 |
1987年 | 17篇 |
1986年 | 6篇 |
1985年 | 19篇 |
1984年 | 16篇 |
1983年 | 6篇 |
1982年 | 9篇 |
1981年 | 12篇 |
1980年 | 13篇 |
1978年 | 10篇 |
1976年 | 14篇 |
1974年 | 8篇 |
1973年 | 9篇 |
1971年 | 6篇 |
1969年 | 7篇 |
1967年 | 8篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
211.
This study investigated factors associated with social anxiety during early adolescence using multiple informants, including
self and peer perspectives, teacher ratings, and direct observations. Negative social performance expectations, maladaptive
coping strategies, and social skill deficits were examined as correlates of social anxiety and mediators linking social anxiety
with poor peer relations. Participants were 84 middle school students (47 girls, 37 boys) over-sampled for elevated social
anxiety. Analyses revealed correlations linking social anxiety with decreased peer acceptance and increased peer victimization.
Path analysis indicated that negative social performance expectations and social withdrawal-disengagement accounted for the
association between social anxiety and decreased peer acceptance. Social anxiety, self-directed coping strategies, and social
withdrawal-disengagement were each directly linked with increased peer victimization for boys. The results replicate findings
based on clinical samples, extend understanding of cognitive, social, and behavioral factors associated with social anxiety
in middle school, and provide new information regarding gender differences in the correlates of social anxiety. 相似文献
212.
213.
214.
Spatial cognition: Behavioral competences,neural mechanisms,and evolutionary scaling 总被引:3,自引:0,他引:3
Hanspeter A. Mallot 《Kognitionswissenschaft》1999,8(1):40-48
215.
Renata Wassermann 《Journal of Philosophical Logic》2011,40(2):271-294
The AGM theory of belief revision provides a formal framework to represent the dynamics of epistemic states. In this framework,
the beliefs of the agent are usually represented as logical formulas while the change operations are constrained by rationality
postulates. In the original proposal, the logic underlying the reasoning was supposed to be supraclassical, among other properties.
In this paper, we present some of the existing work in adapting the AGM theory for non-classical logics and discuss their
interconnections and what is still missing for each approach. 相似文献
216.
Kent K. Alipour Susan Mohammed Sumita Raghuram 《Journal of business and psychology》2018,33(2):231-247
Purpose
The purpose of this study was to investigate the conditional effects of power values diversity and relationship conflict.Design/Methodology/Approach
We utilized a time-lagged survey design and multilevel modeling to investigate 60 teams working on a project task over the course of 4 months.Findings
When participative safety climate was high, the presence of high power values diversity was particularly helpful for reducing relationship conflict. In turn, decreased relationship conflict tended to increase team performance. Additionally, when workload sharing was low, high relationship conflict was especially harmful to team performance.Implications
Results support the consideration of team participative safety climate to better understand the conditions under which power values diversity is likely to lessen relationship conflict and subsequently increase team performance. Findings also highlight the importance of avoiding low workload sharing, in the presence of prominent relationship conflict, to increase team performance.Originality/Value
By examining relationship conflict as a mediator and participative safety climate as a moderator of power values diversity’s effects, we make a novel contribution to extant literature by helping to elucidate both how and under what conditions differences in power values, among team members, can influence team performance. Relatedly, we answer the call for more research that adopts a contingency approach toward examining the effects of values diversity and relationship conflict. In doing so, we help to identify the conditions under which power values diversity and relationship conflict are likely to differentially influence important team outcomes.217.
Lien Vanderkerken Mieke Heyvaert Patrick Onghena Bea Maes 《Applied research in quality of life》2018,13(3):779-802
This study examined family members’ opinions regarding their family quality of life (FQOL). Parents (n = 97) and youngsters (n = 24) of 63 families with a child with an intellectual disability (ID) receiving home-based support completed the Beach Center FQOL Scale. Multilevel models detected substantial variability in FQOL scores and in most subscale scores both within and between families. The observed differences were partly explained by the respondent’s age, the parents’ employment situation, and the support needs of the child with an ID. Role of the family member and gender of the parent could not explain this variability. By including and comparing multiple family members’ opinions, this study contributes to the methodological and conceptual discussions about measuring FQOL. 相似文献
218.
Using a speeded retrieval procedure, we investigated time-of-day effects in automatic and controlled retrieval. Morning-type
adults were tested at either peak (early morning) or off-peak (late afternoon) times on a speeded implicit (Experiment 1)
or explicit (Experiment 2) stem completion task. In Experiment 1, retrieval strategies were identified by changes in response
speed between a practice phase with rapid retrieval and an implicit memory test phase. Performance based on controlled retrieval
(shown by slowdown participants) showed more priming at peak than at off-peak times of day, a finding confirmed in Experiment
2, in which the participants were given intentional retrieval instructions when the materials switched. In contrast, performance
based on automatic retrieval (shown by nonslowdown participants) did not differ across peak and off-peak times. The finding
suggests a robust synchrony effect in controlled retrieval, but not in automatic retrieval, which does not appear to vary
across the day. 相似文献
219.
Behavioural flexibility allows animals to adjust their behaviours according to changing environmental demands. Such flexibility is frequently assessed by the discrimination–reversal learning task. We examined grey squirrels’ behavioural flexibility, using a simultaneous colour discrimination–reversal learning task on a touch screen. Squirrels were trained to select their non-preferred colour in the discrimination phase, and their preferred colour was rewarded in a subsequent reversal phase. We used error rates to divide learning in each phase into three stages (perseveration, chance level and ‘learned’) and examined response inhibition and head-switching during each stage. We found consistent behavioural patterns were associated with each learning stage: in the perseveration stage, at the beginning of each training phase, squirrels showed comparable response latencies to correct and incorrect stimuli, along with a low level of head-switching. They quickly overcame perseveration, typically in one to three training blocks. In the chance-level stage, response latencies to both stimuli were low, but during initial discrimination squirrels showed more head-switches than in the previous stage. This suggests that squirrels were learning the current reward contingency by responding rapidly to a stimulus, but with increased attention to both stimuli. In the learned stage, response latencies to the correct stimulus and the number of head-switches were at their highest, whereas incorrect response latencies were at their lowest, and differed significantly from correct response latencies. These results suggest increased response inhibition and attention allowed the squirrels to minimise errors. They also suggest that errors in the ‘learned’ stage were related to impulsive emission of the pre-potent or previously learned responses. 相似文献
220.
Emotion influences memory in many ways. For example, when a mood-dependent processing shift is operative, happy moods promote
global processing and sad moods direct attention to local features of complex visual stimuli. We hypothesized that an emotional
context associated with to-be-learned facial stimuli could preferentially promote global or local processing. At learning,
faces with neutral expressions were paired with a narrative providing either a happy or a sad context. At test, faces were
presented in an upright or inverted orientation, emphasizing configural or analytical processing, respectively. A recognition
advantage was found for upright faces learned in happy contexts relative to those in sad contexts, whereas recognition was
better for inverted faces learned in sad contexts than for those in happy contexts. We thus infer that a positive emotional
context prompted more effective storage of holistic, configural, or global facial information, whereas a negative emotional
context prompted relatively more effective storage of local or feature-based facial information 相似文献