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   18241篇
  免费   188篇
  国内免费   5篇
各国政治   710篇
工人农民   768篇
世界政治   1194篇
外交国际关系   765篇
法律   11195篇
中国共产党   7篇
中国政治   182篇
政治理论   3434篇
综合类   179篇
  2020年   246篇
  2019年   298篇
  2018年   371篇
  2017年   440篇
  2016年   444篇
  2015年   324篇
  2014年   357篇
  2013年   1678篇
  2012年   489篇
  2011年   541篇
  2010年   431篇
  2009年   445篇
  2008年   551篇
  2007年   591篇
  2006年   566篇
  2005年   512篇
  2004年   500篇
  2003年   536篇
  2002年   448篇
  2001年   688篇
  2000年   559篇
  1999年   498篇
  1998年   266篇
  1997年   180篇
  1996年   218篇
  1995年   189篇
  1994年   223篇
  1993年   211篇
  1992年   334篇
  1991年   365篇
  1990年   352篇
  1989年   298篇
  1988年   337篇
  1987年   285篇
  1986年   331篇
  1985年   301篇
  1984年   246篇
  1983年   234篇
  1982年   190篇
  1981年   203篇
  1980年   132篇
  1979年   185篇
  1978年   137篇
  1977年   118篇
  1976年   111篇
  1975年   137篇
  1974年   145篇
  1973年   113篇
  1972年   114篇
  1969年   105篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
851.
Journal of Youth and Adolescence - Links between parental personality, parenting, and adolescent behavior have been well established. However, extant research is limited by the sole focus on...  相似文献   
852.

Young adulthood represents a developmental period with disproportionately heightened risk of losing a job. Young adult unemployment has been linked to increased mental health problems, at least in the short term. However, their possible long-term impacts, often referred as “scarring effects,” have been understudied, possibly underestimating the magnitude of mental health burden that young adult unemployment generates. This longitudinal study examined whether duration of unemployment during young adulthood is associated with later mental health disorders, after accounting for mental and behavioral health problems in childhood. Furthermore, the current study investigated whether childhood neighborhood characteristics affect this association and if so, in what specific functional ways. Data were drawn from a longitudinal study of developmental outcomes in a community sample in Seattle. Data collection began in 1985 when study participants were elementary students and involved yearly assessments in childhood and adolescence (ages 10–16) and then biennial or triennial assessments (ages 18–39; N?=?677 at age 39; 47% European American, 26% African American, 22% Asian American, and 5% Native American; 49% female). The current study findings suggest that duration of unemployment across young adulthood increased mental health problems at age 39, regardless of gender. Childhood neighborhood characteristics, particularly their positive aspect, exerted independent impacts on adult mental health problems beyond unemployment experiences across young adulthood. The current findings indicate a needed shift in service profiles for unemployed young adults—a comprehensive approach that not only facilitates reemployment but also addresses mental health needs to help them to cope with job loss. Further, the present study findings suggest that childhood neighborhoods, particularly positive features such as positive neighborhood involvement, may represent concrete and malleable prevention targets that can curb mental health problems early in life.

  相似文献   
853.
Journal of Youth and Adolescence - In the original publication, the legends for Figs 4 and 5 were incorrect, such that each regression line was mislabeled with the incorrect country. Below are the...  相似文献   
854.

Research on the health benefits and consequences of close relationships has suggested the linkage in daily emotions (i.e., coregulation) between close partners is an important relationship dynamic. While the coupling of daily emotions among family members (parent–child and marital dyads) has been widely documented, research examining emotional coregulation among ethnic minority youth during adolescence, a period marked by heightened emotion and risk for psychopathology, remains an important area in need of exploration. This study examined correlates of emotional coregulation in a sample of Mexican-origin adolescents (Mage?=?15.02, SD?=?.83) and their parents (Mage?=?41.93, SD?=?6.70). Dyads reported on daily levels of distress and happiness for 14 consecutive days across two waves of data collection a year apart (nwave1?=?428 dyads, nwave2?=?336 dyads). Dyads who reported getting along were more likely to coregulate their daily happiness. Importantly, coregulation of distress was only present in older adolescents who reported above average levels of internalizing symptoms. The results suggest coregulation of distress may shape or be shaped by poor mental health during the later years of adolescence, a time when youth may be establishing a degree of emotional autonomy from parents.

  相似文献   
855.

Across industrialized nations, children and teens are a highly prized target for the advertising industry because young people have a tremendous influence on family purchases; however, media scholars have long suggested that young people are a fundamentally vulnerable audience because they lack the necessary developmental competencies to adequately process and protect themselves from advertising communications. Yet, the precise developmental mechanisms have not been clearly articulated nor is there a clear understanding of how these competencies extend across childhood contexts (e.g., developmental phase, cultures). The current study seeks to lend clarity to this matter by looking at the potential influence that children’s executive function and emotion regulation have on the relationship between television exposure (as a proxy of exposure to advertising messages and other consumption-oriented media content) and consumer behavior across a broad range of ages from two wealthy industrialized countries. Mothers of young elementary school children (5–8 years) and early adolescents (9–12 years) in the Netherlands (N?=?333, 51.7% female child) and the United States of America (N?=?810, 49.6% female child) took part in an online survey to report on their child’s cognitive/affective development, media use, and consumer behavior (i.e., purchase requests, purchase related conflict). The results showed that across ages, executive function via attentional shifting moderated the link between purchase requests and purchase conflict, whereas positively valenced emotion regulation moderated the same relationship but only for older children. Lastly, the findings revealed that while there are differences in reported behavior among children in these two countries, the developmental processes tend to work in the same manner. The discussion focuses on what these findings mean for children’s consumer development as they approach adolescence and how researchers and child advocates should take these developmental factors into account when considering children’s potential vulnerability as consumers.

  相似文献   
856.
Journal of Youth and Adolescence - Adolescents are spending considerable time on social media, yet it is unclear whether motivations for social media use drive different forms of social media...  相似文献   
857.
Journal of Youth and Adolescence - Little is known about the developmental course of informant discrepancies in adolescent aggressive behavior problems, though whether aggression increases or...  相似文献   
858.
Adolescent romantic relationships have the potential to affect psychological functioning well into adulthood. This study assessed adolescent romantic relationship qualities as long-term predictors of psychological functioning utilizing a longitudinal multi-method, multi-informant study of 80 participants (59% female; 54% Caucasian, 35% African American, 11% mixed or other race) assessed at age 17 along with their romantic partners and at ages 25–27. Controlling for gender, family income, and baseline mental health, partner-reported hostile conflict at age 17 predicted relative increases in internalizing behaviors from age 17 to 27. In contrast, observed teen support with their partner during a help-seeking task at age 17 predicted relative decreases in externalizing behaviors over time. The results are interpreted as suggesting qualities that may help determine whether adolescent romances have positive vs. negative long-term psychological health implications.  相似文献   
859.
Adolescence is a challenging developmental period marked with declines in emotional well-being; however, self-compassion has been suggested as a protective factor. This cross-sectional survey study (N?=?765, grades 7th to 12th; 53?% female; 4?% Hispanic ethnicity; 64?% White and 21?% Black) examined whether adolescents’ self-compassion differed by age and gender, and secondly, whether its associations with emotional well-being (perceived stress, life satisfaction, distress intolerance, depressive symptoms, and anxiety) also differed by age and gender. The findings indicated that older females had the lowest self-compassion levels compared to younger females or all-age males. Self-compassion was associated with all emotional well-being measures, and gender and/or age moderated the associations with anxiety and depressive symptoms. Among older adolescents, self-compassion had a greater protective effect on anxiety for boys than for girls. Additionally, older adolescents with low and average self-compassion had greater levels of depressive symptoms than those with high self-compassion. These results may inform for whom and at what age self-compassion interventions may be implemented to protect adolescents from further declines in emotional well-being.  相似文献   
860.
Are internalizing and externalizing behavior problems interrelated via mutually reinforcing relationships (with each behavior leading to increases over time in levels of the other behavior) or mutually suppressing relationships (with each behavior leading to decreases over time in levels of the other behavior)? Past research on the directionality of these relationships has led to ambiguous results, particularly in adolescence. Furthermore, the extent to which prior results will generalize to adolescents with low levels of cognitive abilities remains unknown. This second limit is particularly important, given that these adolescents are known to present higher levels of externalizing and internalizing behaviors than their peers with average-to-high levels of cognitive abilities, and that the mechanisms involved in the reciprocal relationships between these two types of behaviors may differ across both populations. This study examines the directionality of the longitudinal relationships between externalizing and internalizing behavior problems as rated by teachers across three measurement waves (corresponding to Grades 8–10) in matched samples of 138 adolescents (34.78?% girls) with low levels of cognitive abilities and 556 adolescents (44.88?% girls) with average-to-high levels of cognitive abilities. The results showed that the measurement structure was fully equivalent across time periods and groups of adolescents, revealing high levels of developmental stability in both types of problems, and moderately high levels of cross-sectional associations. Levels of both internalizing and externalizing behaviors were higher among adolescents with low levels of cognitive abilities relative to those with average-to-high levels of cognitive abilities. Finally, the predictive analyses revealed negative reciprocal longitudinal relationships (i.e., mutually suppressing relationships) between externalizing and internalizing problems, a result that was replicated within samples of adolescents with low, and average-to-high levels of cognitive ability.  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