全文获取类型
收费全文 | 5529篇 |
免费 | 220篇 |
国内免费 | 2篇 |
出版年
2021年 | 43篇 |
2020年 | 72篇 |
2019年 | 100篇 |
2018年 | 151篇 |
2017年 | 131篇 |
2016年 | 147篇 |
2015年 | 114篇 |
2014年 | 136篇 |
2013年 | 621篇 |
2012年 | 196篇 |
2011年 | 228篇 |
2010年 | 146篇 |
2009年 | 153篇 |
2008年 | 206篇 |
2007年 | 200篇 |
2006年 | 181篇 |
2005年 | 180篇 |
2004年 | 161篇 |
2003年 | 169篇 |
2002年 | 174篇 |
2001年 | 130篇 |
2000年 | 118篇 |
1999年 | 97篇 |
1998年 | 76篇 |
1997年 | 66篇 |
1996年 | 72篇 |
1995年 | 70篇 |
1994年 | 71篇 |
1993年 | 65篇 |
1992年 | 72篇 |
1991年 | 67篇 |
1990年 | 74篇 |
1989年 | 77篇 |
1988年 | 64篇 |
1987年 | 54篇 |
1986年 | 62篇 |
1985年 | 62篇 |
1984年 | 68篇 |
1983年 | 52篇 |
1982年 | 66篇 |
1981年 | 58篇 |
1980年 | 46篇 |
1979年 | 48篇 |
1978年 | 53篇 |
1976年 | 47篇 |
1975年 | 50篇 |
1973年 | 40篇 |
1970年 | 39篇 |
1968年 | 39篇 |
1967年 | 47篇 |
排序方式: 共有5751条查询结果,搜索用时 0 毫秒
321.
Post-traumatic stress disorder often co-occurs with depression, and they may share common risk factors. One possible common cognitive risk factor is hopelessness. Thus, we examined whether hopelessness was related to symptoms of post-traumatic stress disorder. Participants were 202 female survivors of interpersonal violence. Relationships between self-reported and interviewer-rated measures of hopelessness gathered at 2 weeks post-trauma and self-reported and interviewer-rated symptoms of post-traumatic stress disorder gathered at 2 weeks and 3 months post-trauma were examined. Hierarchical, simultaneous regression analyses that co-varied trauma type revealed that hopelessness was related to self-reported symptoms of post-traumatic stress disorder, both concurrently and prospectively. Follow-up analyses revealed that relationships between hopelessness and symptoms of post-traumatic stress disorder were due almost entirely to shared variance with depression. No relationships were found between hopelessness and interviewer-rated symptoms of post-traumatic stress disorder. 相似文献
322.
The aim was to examine associations among body-image, figure rating, and Body Mass Index of seventh grade girls who chose health, physical education, or athletics classes. Measurements were taken prior to and following the course. Class choice was significantly related to body-image satisfaction but not to figure rating or Body Mass Index. Research is needed to examine inaccurate self-perception of fatness in underweight girls, whether there is a higher risk for eating disorders for students in athletics and physical education classes, whether the curriculum is effective with students in physical education and athletics, and why girls who chose the health class began with higher body-image satisfaction than those in physical education or athletics, even though their Body Mass Index and figure-rating size did not differ. 相似文献
323.
The type of information (taxonomic or thematic) available at different levels of knowledge was investigated. Following extensive norming to identify taxonomic and thematic associates of low-frequency nouns, participants determined if taxonomic or thematic associates were meaningfully related to target words at three levels of knowledge: target words they correctly defined (known), recognized as familiar (frontier), or mistakenly denied as part of the language (unknown). In another experiment, participants reported which type of relationship (taxonomic or thematic) was preferred. Results indicated that both types of information were available at all levels of knowledge. However, accuracy and preference were greater for taxonomic associates across word levels. A differential increase in available thematic information relative to taxonomic information was found. Implications for the acquisition and representation of word meanings are discussed. 相似文献
324.
Abstract-Examining the receptive fields of brain signals can elucidate how information impinging on the former modulates the latter. We applied this time-honored approach in early vision to the higher-level brain processes underlying face categorizations. Electroencephalograms in response to face-information samples were recorded while observers resolved two different categorizations (gender, expressive or not). Using a method with low bias and low variance, we compared, in a common space of information states, the information determining behavior (accuracy and reaction time) with the information that modulates emergent brain signals associated with early face encoding and later category decision. Our results provide a time line for face processing in which selective attention to diagnostic information for categorizing stimuli (the eyes and their second-order relationships in gender categorization; the mouth in expressive-or-not categorization) correlates with late electrophysiological (P300) activity, whereas early face-sensitive occipito-temporal (N170) activity is mainly driven by the contralateral eye, irrespective of the categorization task. 相似文献
325.
326.
Fischer AH Rodriguez Mosquera PM van Vianen AE Manstead AS 《Emotion (Washington, D.C.)》2004,4(1):87-94
In this article, the authors report a secondary analysis on a cross-cultural dataset on gender differences in 6 emotions, collected in 37 countries all over the world. The aim was to test the universality of the gender-specific pattern found in studies with Western respondents, namely that men report more powerful emotions (e.g., anger), whereas women report more powerless emotions (e.g., sadness, fear). The authors expected the strength of these gender differences to depend on women's status and roles in their respective countries, as operationalized by the Gender Empowerment Measure (GEM; United Nations Development Programme Human Development Report 2002). Overall, the gender-specific pattern of women reporting to experience and express more powerless emotions and men more powerful emotions was replicated, and only some interactions with the GEM were found. 相似文献
327.
Weaver AJ Flannelly KJ Koenig HG Smith FD 《The journal of pastoral care & counseling : JPCC》2004,58(4):343-350
Based on the content analysis of quantitative research appearing in three medical journals, the authors conclude that, despite the shared ideal of providing spiritual care to patients on the part of physicians and chaplains, there is little attention given in these journals demonstrating and promoting this shared perspective. Suggestions for future research that would focus on this common medicine/religion interface and concern are noted. 相似文献
328.
Pierce JD Cohen AB Ulrich PM 《Journal of comparative psychology (Washington, D.C. : 1983)》2004,118(1):14-19
Substantial variation exists in the importance of olfaction in influencing individuals' preferences, yet the sources of this variation remain elusive. The authors explored responsivity to 2 odorants as 1 potential source. Participants (N = 258) completed the Affective Impact of Odor Scale and were assessed for responsivity to the putative human pheromone androstenone and amyl acetate. Results showed a significant relationship between odorant responsivity and self-reports of the influence of odors. People able to smell androstenone more commonly reported odors as having a negative effect on interpersonal relationships than did people anosmic to androstenone, whereas responsivity to amyl acetate was associated with positive effects of odors on relationships. Responsivity to certain odorants may be an important factor affecting human social interactions. 相似文献
329.
Predicting stability and change in toddler behavior problems: contributions of maternal behavior and child gender 总被引:1,自引:0,他引:1
This study examined the stability and continuity of early-identified behavior problems and the factors associated with this stability. Children and their mothers (N=125) were seen when the children were 2 and 4 years of age. Maternal reports of child externalizing behavior and laboratory observations of child noncompliance were stable from age 2 to age 4. Early externalizing behaviors decreased over time; however, child noncompliance in the laboratory did not. Although few associations were found between maternal positive behavior and child behavior problems, maternal controlling behavior was related to increases in child behavior problems, particularly at high levels of both prior noncompliance and prior maternal control. Child noncompliance was predictive of increases in maternal controlling behavior over time. 相似文献
330.
Three sets of meta-analyses examined gender effects on children's language use. Each set of analyses considered an aspect of speech that is considered to be gender typed: talkativeness, affiliative speech, and assertive speech. Statistically significant average effect sizes were obtained with all three language constructs. On average, girls were slightly more talkative and used more affiliative speech than did boys, whereas boys used more assertive speech than did girls. However, the average effect sizes were either negligible (talkativeness, d=0.11; assertive speech, d=0.11) or small (affiliative speech, d=0.26). Larger effect sizes were indicated for some language constructs depending on either the operational definition of the language measure, the method of recording, the child's age level, the interaction partner (adult or peer), group size, gender composition, observational setting, or type of activity. The results are interpreted in relation to social-developmental and social-constructionist approaches to gender; these views are presented as complementary--rather than competing--meta-theoretical viewpoints. 相似文献