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   1176篇
  免费   45篇
  2023年   9篇
  2022年   4篇
  2021年   8篇
  2020年   22篇
  2019年   26篇
  2018年   47篇
  2017年   32篇
  2016年   31篇
  2015年   17篇
  2014年   40篇
  2013年   171篇
  2012年   47篇
  2011年   53篇
  2010年   37篇
  2009年   42篇
  2008年   41篇
  2007年   39篇
  2006年   45篇
  2005年   35篇
  2004年   47篇
  2003年   44篇
  2002年   34篇
  2001年   12篇
  2000年   17篇
  1999年   12篇
  1998年   21篇
  1997年   19篇
  1996年   18篇
  1995年   14篇
  1994年   10篇
  1993年   17篇
  1992年   12篇
  1991年   13篇
  1990年   9篇
  1989年   8篇
  1988年   8篇
  1987年   16篇
  1985年   19篇
  1984年   16篇
  1983年   6篇
  1982年   7篇
  1981年   11篇
  1980年   12篇
  1978年   7篇
  1976年   12篇
  1974年   6篇
  1973年   4篇
  1969年   4篇
  1967年   4篇
  1956年   3篇
排序方式: 共有1221条查询结果,搜索用时 15 毫秒
911.
The purpose of this article is to broaden our understanding of colic and to explore the effects of infant colic both on the mother's stress level and on her anxiety about separation from her infant. A “colic” group of 20 mother-infant dyads was compared with a second, control “noncolic” group of equal size. Significant group differences in the amount of time the infants cried, fussed, and were in a quiet/awake state were found. Although no difference in maternal trait anxiety was found, mothers in the colic group reported higher levels of stress associated with their infants' crying behavior. This stress was inversely related to the amount of time the infants slept during a 24-hour period. Mothers in the colic group also expressed significantly greater anxiety about separating from their infants for short periods of time; but the lack of freedom was significantly less of a problem for them than it was for mothers in the noncolic group. We conclude that mothers of difficult infants are more anxious about being separated from their infants, but do not appear to feel “trapped” by their extra maternal duties.  相似文献   
912.
Infant crying is frequently quantified as a primary dependent variable in studies where the goal is to understand and soothe infant crying within the context of the parent–infant relationship. Through a historical review and an examination of studies and measurement techniques, the utility of quantifying infant crying is discussed. Although duration and timing of infant crying may be a practical concern for families and health professionals, the effectiveness of soothing interventions may not be best examined by attempts to measure unit reductions in infant crying. Rather, developing an understanding of infant crying within the context of parent–infant relationships may have more utility. Understanding infant crying in context may provide direction to the selection of soothing interventions and to more appropriate measures of the effectiveness of such interventions. ©1999 Michigan Association for Infant Mental Health.  相似文献   
913.
Thirty mothers aged 14–19 and their approximately one-year-old babies participated in this study of the influence of the social support network and stress on infant-mother attachment and on mastery motivation. During the home visit the mothers completed a demographic questionnaire, the Psychosocial Kinship Inventory and the Life Events Stress Scale. In the laboratory the infants' mastery motivation and infant-mother attachment were assessed. A discriminant function analysis indicated that infant-mother attachment was predicted best by the social support network. Multiple regression analyses showed that infant persistence was significantly related to the social network, living with the infant's grandmother and financial aid. The results stress the importance of contextual influences on infant socio-emotional development.  相似文献   
914.
It seems self-evident that people prefer painful experiences to be in the past and pleasurable experiences to lie in the future. Indeed, it has been claimed that, for hedonic goods, this preference is absolute (Sullivan, 2018). Yet very little is known about the extent to which people demonstrate explicit preferences regarding the temporal location of hedonic experiences, about the developmental trajectory of such preferences, and about whether such preferences are impervious to differences in the quantity of envisaged past and future pain or pleasure. We find consistent evidence that, all else being equal, adults and children aged 7 and over prefer pleasure to lie in the future and pain in the past and believe that other people will, too. They also predict that other people will be happier when pleasure is in the future rather than the past but sadder when pain is in the future rather than the past. Younger children have the same temporal preferences as adults for their own painful experiences, but they prefer their pleasure to lie in the past and do not predict that others' levels of happiness or sadness vary dependent on whether experiences lie in the past or the future. However, from the age of 7, temporal preferences were typically abandoned at the earliest opportunity when the quantity of past pain or pleasure was greater than the quantity located in the future. Past–future preferences for hedonic goods emerge early developmentally but are surprisingly flexible.  相似文献   
915.
916.
According to the psychological essentialism perspective, people tend to explain differences between groups by attributing them different essences. Given a pervasive ethnocentrism, this tendency implies that the human essence will be restricted to the ingroup whereas outgroups will receive a lesser degree of humanity. Therefore, it is argued that people attribute more uniquely human characteristics to the ingroup than to the outgroup. The present article focuses on secondary emotions that constitute such characteristics. Study 1 showed that members of high‐ and low‐status groups attribute more positive secondary emotions to the ingroup than to the outgroup. Study 2 verified that the differential attribution extended also to negative secondary emotions. No exemplars of emotions were provided in Study 3. Instead, participants had to estimate the means of two distributions of numbers that supposedly represented characteristics of the ingroup and of the outgroup. The results of this third experiment illustrated the reluctance to attribute secondary emotions to the outgroup. The findings are discussed from the perspective of psychological essentialism. Copyright © 2001 John Wiley & Sons, Ltd.  相似文献   
917.
The focus of questions of justice in health policy has shifted during the last 20 years, beginning with questions about rights to health care, and then, by the late 1980s, turning to issues of rationing. More recently, attention has focused on alternatives to cost-effectiveness analysis. In addition, health inequalities, and not just inequalities in access to health care, have become the subject of moral analysis. This article examines how such trends have transformed the philosophical landscape and encouraged some in bioethics to seek guidance on normative questions from outside of the contours of traditional philosophical arguments about justice.  相似文献   
918.
919.
920.
In spring 1981, 1,712 pupils in the third, fourth and fifth years of secondary education at 20 comprehensive schools in England completed a questionnaire about the priorities they gave to different aspects of vocational choice and preparation. Fifth-year pupils were followed up one year later, and perceived needs again recorded. Consistency between year-groups, and between fifth-year and follow-up, was high, suggesting that the perceived needs of even the third-year group were based on a realistic appraisal of the tasks they faced in entering employment. Systematic differences in ranked priority were found, however, with those who had left school giving much greater priority to work experience and less to discussions with family and teachers than those still at school. All ages reported considerable anxiety about finding work, with levels of rated anxiety on the other items being greatest amongst the third-year pupils.  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