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   1065篇
  免费   97篇
  2024年   2篇
  2023年   12篇
  2022年   14篇
  2021年   32篇
  2020年   37篇
  2019年   41篇
  2018年   59篇
  2017年   51篇
  2016年   70篇
  2015年   47篇
  2014年   58篇
  2013年   140篇
  2012年   78篇
  2011年   77篇
  2010年   39篇
  2009年   41篇
  2008年   62篇
  2007年   52篇
  2006年   44篇
  2005年   42篇
  2004年   34篇
  2003年   32篇
  2002年   25篇
  2001年   12篇
  2000年   8篇
  1999年   12篇
  1998年   5篇
  1997年   4篇
  1996年   6篇
  1995年   5篇
  1994年   6篇
  1993年   4篇
  1992年   1篇
  1991年   1篇
  1990年   1篇
  1988年   2篇
  1987年   1篇
  1985年   1篇
  1983年   1篇
  1980年   1篇
  1973年   1篇
  1965年   1篇
排序方式: 共有1162条查询结果,搜索用时 31 毫秒
941.
American universities increasingly admit first-generation students—students whose parents do not have four-year degrees. Once admitted, these students experience greater challenges adjusting to universities compared to continuing-generation students—students who have at least one parent with a four-year degree. This additional adversity is typically explained in terms of first-generation students' relative lack of economic (e.g., money) or academic (e.g., preparation) resources. We propose that this adversity also stems from a cultural mismatch between the mostly middle-class, independent norms institutionalized in American universities and the relatively interdependent norms that first-generation students are socialized with in working-class contexts before college. As predicted, an experiment revealed that framing the university culture in terms of independent norms (cultural mismatch) led first-generation students to show greater increases in cortisol and less positive/more negative emotions than continuing-generation students while giving a speech. However, reframing the university culture to include interdependent norms (cultural match) eliminated this gap.  相似文献   
942.
Relatively little is understood about the role of hostile attributions in children's use of relational aggression with peers, or about the impact of family processes on children's attributions about ambiguous provocations. This cross-sectional study investigated associations among hostile attributions made by children, mothers, and fathers, and children's use of relational aggression with peers. The sample included 91 children in Grades 3-5 (43 girls), and their mothers (n = 90) and teachers (n = 88). Fathers also participated for a subsample of children (n = 53). Results showed that relational aggression is associated with a hostile attribution bias in children and parents, although findings varied as a function of gender of parent and child, provocation type, and informant of aggression. Overall, mothers' attributions were more closely related to daughters' attributions and aggressive behavior than to sons'. Implications of these findings for social information processing models and family-focused prevention of relational aggression are discussed.  相似文献   
943.
When individuals grow up with autonomy-thwarting parents, they may be prevented from exploring internally endorsed values and identities and as a result shut out aspects of the self perceived to be unacceptable. Given the stigmatization of homosexuality, individuals perceiving low autonomy support from parents may be especially motivated to conceal same-sex sexual attraction, leading to defensive processes such as reaction formation. Four studies tested a model wherein perceived parental autonomy support is associated with lower discrepancies between self-reported sexual orientation and implicit sexual orientation (assessed with a reaction time task). These indices interacted to predict anti-gay responding indicative of reaction formation. Studies 2-4 showed that an implicit/explicit discrepancy was particularly pronounced in participants who experienced their fathers as both low in autonomy support and homophobic, though results were inconsistent for mothers. Findings of Study 3 suggested contingent self-esteem as a link between parenting styles and discrepancies in sexual orientation measures.  相似文献   
944.
Throughout history, humans have had to detect and deflect myriad threats from their social and physical environment in order to survive and flourish. When people detect a threat, the most common response is avoidance. In the present research, the authors provide evidence that ingroup power threats elicit a very different response. Three experiments supported the hypothesis that dominant leaders seek proximity to ingroup members who pose a threat to their power, as a way to control and downregulate the threat that those members pose. In each experiment, leaders high (but not low) in dominance motivation sought proximity to an ingroup member who threatened their power. Consistent with the hypothesis that increased proximity was designed to help leaders protect their own power, the proximity effect was apparent only under conditions of unstable power (not stable power), only in the absence of intergroup competition (not when a rival outgroup was present), and only toward a threatening group member (not a neutral group member). Moreover, the effect was mediated by perceptions of threat (Experiment 1) and the desire to monitor the threatening group member (Experiment 3). These results shed new light on one key strategy through which dominant leaders try to maintain control over valuable yet potentially threatening group members. Findings have implications for theories of power, leadership, and group behavior.  相似文献   
945.
Public opposition to antiracism laws—an expression of prejudice toward immigrants—is widespread in Switzerland as well as in other European countries. Using data from the European Social Survey 2002 (N = 1,711), the present study examined across Swiss municipalities individual and contextual predictors of opposition to such laws and of two well‐established antecedents of prejudice: perceived threat and intergroup contact. The study extends multilevel research on immigration attitudes by investigating the role of the ideological climate prevailing in municipalities (conservative vs. progressive), in addition to structural features of municipalities. Controlling for individual‐level determinants, stronger opposition to antiracism laws was found in more conservative municipalities, while the proportion of immigrants was positively related to intergroup contact. Furthermore, in conservative municipalities with a low proportion of immigrants, fewer intergroup contacts were reported. In line with prior research, intergroup contact decreased prejudiced policy stances through a reduction of perceived threat. Overall, this study highlights the need to include normative and ideological features of local contexts in the analysis of public reactions toward immigrants.  相似文献   
946.
Individuals?? goals can direct their own social behavior and development. We extended and validated a social dating goals measure (SDGS-R) to assess identity, intimacy and status goals, and compared goals by age, gender, sexual orientation and romantic status. Participants were 121 adolescents and 249 emerging adults (age M?=?20.6). The expected 3-factor structure of the SDGS-R was found and confirmed (18 items). Identity, intimacy and status goals had small correlations with each other and analyses validated the meaning and uniqueness of each goal. Participants reported more identity and intimacy goals than status goals. Intimacy goals were more prominent among older compared to teenage participants and those with a partner rather than without one. Females reported more identity dating goals than males. There was no difference in the goals of same-sex and other-sex attracted youth. The availability of the SDGS-R will allow further study of romantic development and relationship functioning.  相似文献   
947.
Low-income African American children have disproportionately higher asthma morbidity and mortality. Education alone may not address barriers to asthma management due to psychosocial stress. This study evaluated the efficacy of a home-based family intervention integrating asthma education and strategies to address stress using a community-based participatory research model. Children age 8 to 13 with poorly controlled asthma and their caregivers were recruited from an urban hospital and an asthma camp. Caregivers with elevated scores on a stress measure were enrolled. Forty-three families were randomized to the 4- to 6-session Home Based Family Intervention (HBFI) or the single session of Enhanced Treatment as Usual (ETAU). All families received an asthma action plan and dust mite covers; children performed spirometry and demonstrated MDI/spacer technique at each home visit. The HBFI addressed family-selected goals targeting asthma management and stressors. Asthma management, morbidity, family functioning, and caregiver stress were assessed at baseline, postintervention, and 6 months after the intervention. ED visits and hospitalizations were ascertained by medical record review for a year after intervention completion. Only one child (5%) in HBFI had an asthma-related hospitalization compared to 7 patients (35%) in ETAU in the year following intervention. Participants in both groups demonstrated improved asthma management and family functioning, and reduced ED visits, symptom days, missed school days, and caregiver stress, but there were no differential treatment effects. The results suggest that a home-based intervention addressing medical and psychosocial needs may prevent hospitalizations for children with poorly controlled asthma and caregivers under stress.  相似文献   
948.
Language and math are intertwined during children's learning of arithmetic concepts, but the importance of language in adult arithmetic processing is less clear. To determine whether early learning plays a critical role in the math-language connection in adults, we tested retrieval of simple multiplication in adult bilinguals who learned arithmetic in only one language. We measured electrophysiological and behavioral responses during correctness judgments for problems presented as digits or as number words in Spanish or English. Problems presented in the language in which participants learned arithmetic elicited larger, more graded, and qualitatively different brain responses than did problems presented in participants' other language, and these responses more closely resembled responses for digits, even when participants' other language was more dominant. These findings suggest that the memory networks for simple multiplication are established when arithmetic concepts are first learned and are independent of language dominance in adulthood.  相似文献   
949.
Patients with inflammatory bowel diseases (IBDs) have a higher risk of developing colorectal cancer (CRC) than the general population. Furthermore, chronic psychosocial stress increases the likelihood of developing IBD and multiple types of malignant neoplasms, including CRC. Here, for the first time, we investigate the effects of chronic psychosocial stress in male mice on an artificially induced CRC, by employing the chronic subordinate colony (CSC) housing paradigm in combination with the reliable azoxymethane (AOM)/dextran sodium sulfate (DSS) CRC model. Colonoscopy revealed that CSC mice showed accelerated macroscopic suspect lesions. In addition, more CSC mice developed low-grade dysplasia (LGD) and/or high-grade dysplasia (HGD) in the colonic tissue compared to the single-housed control mice (SHC). CSC mice showed an increased number of Ki67+ and a decreased number of terminal deoxynucleotidyl transferase dUTP nick end labeling epithelial cells in colonic tissue. Colonic liver receptor homolog-1 (LRH-1), cyclooxygenase II (COXII), tumor necrosis factor, forkhead box P3 (FoxP3) mRNA as well as colonic ?-catenin, COXII, and LRH-1 protein expression were also increased in CSC compared with SHC mice. Although the number of CD4+ Th cells was increased, a tendency toward a decreased colonic interferon-γ (IFN-γ) mRNA expression was observed. Furthermore, despite an increased percentage of CD3+ cells and CD3+/FoxP3+ double-positive cells within mesenteric lymph node cells of CSC mice, IFN-γ secretion from these cells was unaffected. Altogether, our results suggest that chronic psychosocial stress increases the risk for AOM/DSS-induced and, thus, inflammation-related CRC. Finally, assessment of additional time points may test whether the shift from tumor-protective Th1 cell to regulatory T-cell immunity represents a consequence of increased carcinogenesis or a causal factor involved in its development.  相似文献   
950.
Traumatic experiences that occur during adolescence can render individuals vulnerable to mood and anxiety disorders. A model in juvenile rats (age: 27-29 days) was developed previously to study the long-term effects of adolescent stress exposure on behaviour and physiology. This paradigm, termed juvenile stress, involves subjecting juvenile rats to different stressors on consecutive days over a 3-day period. Here, we investigated the effects of the juvenile stress paradigm on freezing behaviour and aversive 22-kHz ultrasonic vocalizations (USVs) during auditory fear conditioning in adult male rats (age: 68-90 days). We found that rats previously subjected to juvenile stress increased aversive 22-kHz USVs (total calls and time spent calling) compared with controls during fear-conditioning training. The acoustic USV parameters between control and juvenile stress rats were largely equivalent, including duration, peak frequency and amplitude. While rats did not differ in freezing behaviour during fear conditioning, juvenile stress rats exhibited greater cue-conditioned freezing upon testing 24 h later. Our results show that juvenile stress elicited different long-term changes in freezing and aversive USVs during fear conditioning. Furthermore, they highlight the importance of assessing USVs to detect experience-dependent differences between control and stress-exposed animals which are not detectable by measuring visible behaviour.  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