首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2085篇
  免费   112篇
  国内免费   1篇
  2024年   4篇
  2023年   27篇
  2022年   11篇
  2021年   36篇
  2020年   45篇
  2019年   41篇
  2018年   100篇
  2017年   92篇
  2016年   79篇
  2015年   53篇
  2014年   70篇
  2013年   327篇
  2012年   168篇
  2011年   148篇
  2010年   85篇
  2009年   57篇
  2008年   140篇
  2007年   127篇
  2006年   99篇
  2005年   66篇
  2004年   39篇
  2003年   45篇
  2002年   46篇
  2001年   12篇
  2000年   30篇
  1999年   20篇
  1998年   20篇
  1997年   13篇
  1996年   15篇
  1995年   12篇
  1994年   21篇
  1993年   6篇
  1992年   8篇
  1991年   18篇
  1990年   9篇
  1989年   11篇
  1988年   7篇
  1987年   6篇
  1985年   4篇
  1984年   13篇
  1983年   7篇
  1982年   4篇
  1980年   3篇
  1979年   6篇
  1977年   5篇
  1976年   3篇
  1975年   4篇
  1974年   3篇
  1973年   3篇
  1970年   3篇
排序方式: 共有2198条查询结果,搜索用时 31 毫秒
991.
This qualitative study explored what a Batswana group of African students (N?=?73) find most meaningful in their life and why those sources of meaning are important to them. Findings showed that, in line with previous Western studies, the most important source of meaning is relationships, and in particular family which provides support, but is also intrinsically valuable. Relatedness in this African group is also different from Western conceptualisations and previous empirical findings in the sense that horizontal (interpersonal) and vertical (spiritual) relationships are deeply intertwined. Education as a domain of life is also an important source of meaning to this cohort of students. The reported perceived meanings and experienced reasons bring forth a picture that resonates with values and expectations from the specific cultural and life phase contexts in which these African students are embedded. The meaning of these meanings for the enhancement of well-being in students merits exploration.  相似文献   
992.
Several experimental studies have shown that there exists an association between emotion words and the vertical spatial axis. However, the specific conditions under which this conceptual–physical interaction emerges are still unknown, and no study has been devised to test whether longer linguistic units than words can lead to a mapping of emotions on vertical space. In Experiment 1, Spanish and Colombian participants performed a representative verbal emotional contexts production task (RVEC task) requiring participants to produce RVEC for the emotions of joy, sadness, surprise, anger, fear, and disgust. The results showed gender and cultural differences regarding the average number of RVEC produced. The most representative contexts of joy and sadness obtained in Experiment 1 were used in Experiment 2 in a novel spatial–emotional congruency verification task (SECV task). After reading a sentence, the participants had to judge whether a probe word, displayed in either a high or low position on the screen, was congruent or incongruent with the previous sentence. The question was whether the emotion induced by the sentence could modulate the responses to the probes as a function of their position in a vertical axis by means of a metaphorical conceptual–spatial association. Overall, the results indicate that a mapping of emotions on vertical space can occur for linguistic units larger than words, but only when the task demands an explicit affective evaluation of the target.  相似文献   
993.
Our study aimed to assess the quality of life (QoL) of patients with congestive heart failure (CHF) and to correlate the different aspects of QoL with relevant socio-demographic variables, CHF severity, somatic comorbidities, other clinical variables and depressive symptomatology. In a cross-sectional study design, a community sample of 103 adult patients with CHF (mean age 68 years, 73 % male) was recruited from an outpatient cardiology practice. CHF severity was assessed with physician ratings of the New York Heart Association (NYHA) functional class and measurement of brain natriuretic peptide (BNP) levels. The psychometric evaluation of quality of life was made using the Medical Outcomes Study Short Form-36 (SF-36) and the Kansas City Cardiomyopathy Questionnaire (KCCQ). The Beck Depression Inventory Second Edition (BDI-II) assessed depressive symptoms. Using multiple linear regression, predictors of poorer QoL included being a female, being older, living alone, NYHA functional class ≥ II, higher levels of BNP comorbidity (such as renal insufficiency and cerebrovascular disease), fluid retention, depressive symptomatology (assessed by BDI-II) and treatment with anti-dyslipidemics, diuretics and β-blockers. Among these correlates, psychological distress was the most strongly related to QoL. Also, functional status measured by NYHA demonstrated a high impact on QoL. Our findings suggest the need to address such factors in developing effective care to improve psychological and functional status in order to enhance QoL in these patients.  相似文献   
994.
The efficacy of keyword mnemonics in the learning of the non-dominant language in bilingual students was assessed. Of a total of 237 Compulsory Secondary Education students who participated in the study, 102 students used keyword mnemonics and 100 students used the rote method to learn the Spanish meaning of a list of 20 Galician words (the remaining 35 students generated the keywords to be used in the study). Moreover, each participant’s image control was assessed. The recall of the meaning of words was greater in the keyword mnemonics group than in the rote learning group both in terms of receptive and productive recall. Moreover, participants with high image control had better recall than those with low image control ability.  相似文献   
995.
Attractiveness is the most important component of women intrasexual competition and it certainly has an impact in female’s perceived mate value (i.e., the value of an individual to the opposite sex as a potential mate). In the realm of intrasexual competition women are eager to emphasize their attractiveness and compete with rivals displaying these cues. Accordingly, age is an important feature of women’s appeal to the opposite sex; youth is highly valued by men, and is perceived by women as an important component of their attractiveness. Another trait that is a reliable cue of health and fertility is Body Mass Index (BMI). A large body of literature has associated BMI to female attractiveness. However, more information is necessary about the associations of BMI and age with mate value, and female intrasexual competition. In the present research we report two studies that examined the associations of BMI and age with estimates of self-perceived mate value and intrasexual competition in Chilean women (18–39 years). More specifically, we hypothesized inverse relationships of BMI and age with mate value (N?=?234), and intrasexual competition (N?=?308). We found partial support to our propositions. The results revealed inverse associations between BMI, mate value and mating success, but BMI with intrasexual competition were not related. In contrast, age had a strong and negative effect on intrasexual competition. We discuss our results within the framework of Evolutionary Psychology and consider the central role of attractiveness (estimated from BMI and age) in the mating strategies of women.  相似文献   
996.
The study identifies relationships between the characteristics of personal networks of demobilized individuals and their quality of life, through the evaluation of a sample of 102 ex‐combatants from a demilitarized zone in Colombia's Caribbean coast. The data was processed using centrality values calculation and statistical analysis through the Pearson correlation coefficient. Results showed moderate levels of nodality, proximity and intermediation degrees regarding small, closed networks with an unsatisfied high demand for support resources. Quality of life showed medium performance levels, with inverse relationships between mental health (p = .009 < .05) and vitality (p = .011 < .05) and intermediation. Positive feedback related significantly to general health (p = .041 < .05), while negative interactions showed inverse relationships to physical functioning (p = .012 < .05), physical role (p = .005), mental health (p = .001 < .05), and emotional role (p = .009 < .05). In conclusion, among the highly cohesive personal networks, there were less observations of social support that fosters increased energy and psychological health, given that access to this support is limited to a small number of members of the personal network. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   
997.
The phenomenon of cheating in higher education is of overwhelming importance in that the students engaging in these acts are unlikely to have the skills necessary for their future professional life. Despite its relevance, the empirical evaluation of cheating in universities has been almost exclusively focused on the US context. Little is known about cheating at the European level, let alone in Portugal. Even less is explored at the regional level. In this paper we present evidence on the perception of cheating by Portuguese undergraduate students of economics/business degrees. We undertake a large-scale survey, involving 2675 students from all Portuguese mainland public universities (10). We found that copying-favourable environments are associated with a higher propensity to cheat. Moreover, in universities where ‘codes of honour’ exist, this propensity tends to be lower. Finally, the propensity to copy seems to be highly influenced by the cultural systems and socially-related factors of different regions.  相似文献   
998.
The aim of this article was to study the effect of virtual-reality exposure to situations that are emotionally significant for patients with eating disorders (ED) on the stability of body-image distortion and body-image dissatisfaction. A total of 85 ED patients and 108 non-ED students were randomly exposed to four experimental virtual environments: a kitchen with low-calorie food, a kitchen with high-calorie food, a restaurant with low-calorie food, and a restaurant with high-calorie food. In the interval between the presentation of each situation, body-image distortion and body-image dissatisfaction were assessed. Several 2?x?2?x?2 repeated measures analyses of variance (high-calorie vs. low-calorie food?x?presence vs. absence of people?x ED group vs. control group) showed that ED participants had significantly higher levels of body-image distortion and body dissatisfaction after eating high-calorie food than after eating low-calorie food, while control participants reported a similar body image in all situations. The results suggest that body-image distortion and body-image dissatisfaction show both trait and state features. On the one hand, ED patients show a general predisposition to overestimate their body size and to feel more dissatisfied with their body image than controls. On the other hand, these body-image disturbances fluctuate when participants are exposed to virtual situations that are emotionally relevant for them.  相似文献   
999.
In this study, participants read stories describing emotional episodes with either a positive or negative valence (Experiment 1). Following each story, participants were exposed to short sentences referring to the protagonist, and the event-related potential (ERP) for each sentence's last word was recorded. Some sentences described the protagonist's emotion, either consistent or inconsistent with the story; others were neutral; and others involved a semantically anomalous word. Inconsistent emotions were found to elicit larger N100/P200 and N400 than consistent emotions. However, when participants were exposed to the same critical sentences in a control experiment (Experiment 2) in which the stories had been removed, emotional consistency effects disappeared in all ERP components, demonstrating that these effects were discourse-level phenomena. By contrast, the ordinary N400 effect for locally anomalous words in the sentence was obtained both with and without story context. In conclusion, reading stories describing events with emotional significance determines strong and very early anticipations of an emotional word.  相似文献   
1000.
Our paper offers a reflection on the state of the art of antisocial behaviors in adolescence, seeking to review and synthesize relevant conclusions from developmental investigation on this subject. We begin by identifying the peculiarities of the antisocial phenomenon in adolescence, with particular focus on social and family aspects that may influence social behaviors at this stage, as well as on individual variables that undergo considerable development in adolescence and may play an important role in risk behaviors, such as psychosocial competence, personality, self-concept, and intelligence. The general conclusion points out questions that remain unanswered. Therefore, work seeking to address some of those questions is presented.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号