全文获取类型
收费全文 | 53211篇 |
免费 | 1927篇 |
国内免费 | 27篇 |
出版年
2020年 | 504篇 |
2019年 | 633篇 |
2018年 | 879篇 |
2017年 | 967篇 |
2016年 | 942篇 |
2015年 | 672篇 |
2014年 | 795篇 |
2013年 | 4162篇 |
2012年 | 1465篇 |
2011年 | 1604篇 |
2010年 | 1040篇 |
2009年 | 1011篇 |
2008年 | 1437篇 |
2007年 | 1371篇 |
2006年 | 1278篇 |
2005年 | 1126篇 |
2004年 | 1027篇 |
2003年 | 1055篇 |
2002年 | 1045篇 |
2001年 | 1829篇 |
2000年 | 1785篇 |
1999年 | 1311篇 |
1998年 | 617篇 |
1997年 | 506篇 |
1992年 | 1104篇 |
1991年 | 1044篇 |
1990年 | 1048篇 |
1989年 | 973篇 |
1988年 | 950篇 |
1987年 | 941篇 |
1986年 | 916篇 |
1985年 | 987篇 |
1984年 | 793篇 |
1983年 | 644篇 |
1982年 | 529篇 |
1981年 | 514篇 |
1979年 | 821篇 |
1978年 | 616篇 |
1977年 | 570篇 |
1976年 | 520篇 |
1975年 | 739篇 |
1974年 | 766篇 |
1973年 | 805篇 |
1972年 | 683篇 |
1971年 | 589篇 |
1970年 | 548篇 |
1969年 | 634篇 |
1968年 | 711篇 |
1967年 | 631篇 |
1966年 | 682篇 |
排序方式: 共有10000条查询结果,搜索用时 187 毫秒
31.
Loving and angry? Happy and sad? Understanding and reporting of mixed emotions in mother–child relationships by 6‐ to 12‐year‐olds
下载免费PDF全文
![点击此处可从《The British journal of developmental psychology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Bernd G. Heubeck Phillipa R. Butcher Kristie Thorneywork Jeff Wood 《The British journal of developmental psychology》2016,34(2):245-260
The Evaluative Space Model of emotions allows for the coactivation of positive‐appetitive and negative‐avoidant systems, but few studies have examined mixed emotions in child development. Existing research suggests children's understanding of opposite valence emotion combinations emerges by approximately 11 years of age. However, it is not yet clear whether various opposite valence combinations are understood at different ages, nor whether children can understand them in others before they have experienced such mixed emotions themselves. Semi‐structured interviews with 97 children investigated whether they regarded six combinations of opposite valence mixed emotions as possible, could provide reasons for them, and report their own experience of each in the context of mother–child relationships. Both understanding that such combinations are possible and ability to provide reasons for them increased after age 6 and up to age 11, but were still incomplete in 12‐year‐olds. Understanding of different opposite valence combinations developed at different rates. At each age, fewer children who showed understanding of these combinations in others reported having had a similar experience themselves. The findings suggest a need to systematically examine a range of mixed emotions in order to develop a comprehensive theory of the development of mixed emotion understanding. They also suggest extending research into adolescence. 相似文献
32.
Although perceived health risk plays a prominent role in theories of health behavior, its empirical role in risk taking is less clear. In Study 1 (N = 129), 2 measures of drivers' risk-taking behavior were found to be unrelated to self-estimates of accident concern but to be related to self-ratings of driving skill and the perceived thrill of driving. In Study 2 (N = 405), out of a wide range of potential influences, accident concern had the weakest relationship with risk taking. The authors concluded that although health risk is a key feature in many theories of health behavior and a central focus for researchers and policy makers, it may not be such a prominent factor for those actually taking the risk. 相似文献
33.
Marcellus M Merritt Gary G Bennett Redford B Williams Christopher L Edwards John J Sollers 《Health psychology》2006,25(3):364-369
This study evaluated cardiovascular responses (CVR) to an active speech task with blatantly discriminatory (BRC) versus neutral (NRC) stimuli and an anger recall task in a sample of Black men (N = 73; age 18 to 47). Diastolic blood pressure scores were higher for NRC versus BRC stimuli during anger recall (p = .05). Moreover, persons in the NRC group who perceived high levels of racism (vs. no racism or BRC group) during active speech showed larger increases in blood pressure across postspeech rest, anger recall, and subsequent rest (p = .03). The notable elevation in CVR in response to an ambiguous event extends current models of racism suggesting that subtle racism is a psychosocial stressor that erodes health through chronically elevated CVR. 相似文献
34.
35.
36.
37.
Kristine L S P McVea 《Health psychology》2006,25(5):558-562
OBJECTIVE: This report reviews the evidence that informs the role of health and mental health care providers in addressing youth smoking cessation. DESIGN: Qualitative literature review. RESULTS: Physicians do not consistently screen adolescents for tobacco use and fail to provide recommended cessation advice. Challenges to addressing smoking cessation include the need for procedures to ensure confidentiality and the existence of competing demands to provide other services. Few published studies have specifically addressed the effectiveness of clinical interventions. Interventions that require return visits or follow-up phone contacts are technically difficult to implement in this population. Successful interventions may require resources not available in nonresearch settings. Most studies have used brief clinical intervention as a control condition, making it impossible to evaluate its effectiveness. CONCLUSION: There is little evidence that supports current clinical smoking cessation guidelines for adolescents. More research is needed to develop inexpensive, efficient clinical interventions that can provide youths access to smoking cessation help. Future challenges include reorganizing clinical systems to offer greater counseling by support staff or in electronic formats and to provide effective booster messages and follow-up care in a population that is difficult to track. 相似文献
38.
An electronic apparatus using infrared beams for monitoring the movements of individual bees under dark conditions is described. The searching behavior of workers in an arena was monitored over 2-h periods. Mean ambulatory velocity for one bee over a distance of 100 mm was 45.6±1.51 mm/sec (n=45). Thigmokinesis and temporal activity patterns are illustrated. 相似文献
39.
40.
A time-sharing paradigm was used to study potential interference effects of concurrent successive-auditory/vocal, successive-visual/motor, simultaneous-auditory/vocal, and simultaneous-visual/motor tasks on right- and left-handed manual-motor behaviors of differential levels of difficulty. Participants were selected from each of three developmental levels from 9 through 20 years of age. Results suggested that processing style (i.e., successive or simultaneous) interacts with modality (i.e., auditory/vocal or visual/motor) in terms of lateralized interference effects; however, potential effects due to age level were obfuscated by differential concurrent-task difficulties. 相似文献