全文获取类型
收费全文 | 175053篇 |
免费 | 7880篇 |
国内免费 | 158篇 |
专业分类
183091篇 |
出版年
2021年 | 1507篇 |
2020年 | 2805篇 |
2019年 | 3487篇 |
2018年 | 3547篇 |
2017年 | 3991篇 |
2016年 | 4684篇 |
2015年 | 3985篇 |
2014年 | 4850篇 |
2013年 | 23896篇 |
2012年 | 4608篇 |
2011年 | 3692篇 |
2010年 | 3963篇 |
2009年 | 4862篇 |
2008年 | 4013篇 |
2007年 | 3491篇 |
2006年 | 4143篇 |
2005年 | 4114篇 |
2004年 | 3634篇 |
2003年 | 3304篇 |
2002年 | 3096篇 |
2001年 | 3052篇 |
2000年 | 2933篇 |
1999年 | 3022篇 |
1998年 | 2872篇 |
1997年 | 2713篇 |
1996年 | 2624篇 |
1995年 | 2449篇 |
1994年 | 2418篇 |
1993年 | 2360篇 |
1992年 | 2544篇 |
1991年 | 2377篇 |
1990年 | 2252篇 |
1989年 | 2173篇 |
1988年 | 2153篇 |
1987年 | 2171篇 |
1986年 | 2159篇 |
1985年 | 2376篇 |
1984年 | 2543篇 |
1983年 | 2334篇 |
1982年 | 2407篇 |
1981年 | 2363篇 |
1980年 | 2198篇 |
1979年 | 2173篇 |
1978年 | 2198篇 |
1977年 | 2155篇 |
1976年 | 1978篇 |
1975年 | 1997篇 |
1974年 | 2092篇 |
1973年 | 1961篇 |
1972年 | 1505篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
961.
K. Alison Clarke-Stewart 《Infant and child development》1992,1(1):5-14
Twenty years ago, William Kessen, Greta Fein and I developed and tested a model of parent education, a model which involved variation in curricular content, didactic approaches, and child outcomes–experimentally contrasted. Our experience yielded some valuable lessons about the extent to which researchers can influence parents' behaviour, and parents their children's development. In the present article I suggest that these lessons might be useful for researchers now as they were for us then. I present some observations about the research that developmental psychologists have done in the intervening two decades and suggest that we could learn much by using such a model of parent education to answer questions about the effets of parents' behaviour on children's development. Carefully done, parent education studies can yield valuable information about many of the questions raised in recent correlational research. Parent training research can suggest hypotheses that can be tested with data collected non-interventively and analysed in causal model analyses–and vice versa. What is more, because one reason for studying parent effects is so that we can offer guidance to parents about rearing their children, this design has a particular advantage; it is both the medium and the message. 相似文献
962.
The twisted helix: An essay on genetic counselors,eugenics, and social responsibility 总被引:2,自引:0,他引:2
Resta RG 《Journal of genetic counseling》1992,1(3):227-243
The American eugenics movement had a significant impact on American social history, and analysis of the movement illustrates the relationship among science, scientists, and society. The history of the American eugenics movement as well as more recent examples of eugenic thought and biological determinism are reviewed. The need for genetic counselors to confront eugenic issues in their own profession and in society is discussed. 相似文献
963.
Genetic counselors have participated in the Michigan Newborn Screening Program on a contractual basis since 1988. Their role includes newborn screening education and training, newborn nursery site visits, and monitoring newborn screening in hospitals. Their impact has been to improve the quality of newborn screening services by reducing errors and increasing completion of data fields on newborn screening cards, improving hospital nursery cooperation and problem solving, and enhancing health department response to specific problems. 相似文献
964.
965.
Genetic issues are demanding more attention in the area of public health. Adoption agencies and policymakers are beginning to address these issues where they relate to the adoption process and to the many families involved in adoption in this country. Genetic counselors need to play an active role as both educators of and consultants for adoption professionals and the families with whom they work. To facilitate a partnership between genetics and adoption we have developed a workshop intended to educate adoption professionals about the lifelong implications of genetic conditions on the adoption triad. 相似文献
966.
Instruction in baby massage and the Burleigh Relaxation Bath technique was given to one-half of our sample of 32 couples who had just had their first child. This brief intervention, given at 4 weeks post-partum, led to beneficial behavioural and psychological effects for the family system when assessed at 12 weeks postpartum. Depression and marital satisfaction were assessed with mothers and fathers at 4 weeks and 12 weeks after the birth of their child, and self-esteem was measured at 12 weeks only. The mothers and fathers who were shown baby bathing and massage techniques showed higher degrees of marital satisfaction and self-esteem, as well as lower levels of depression at 12 weeks post-partum, than parents who did not receive instruction. It seems likely that brief interventions which educate new parents concerning functional techniques of baby care may favourably affect their feelings of competence and be of benefit to the entire family system. 相似文献
967.
The validity of maternal self-reports about their parenting behaviour is evaluated with two studies. In both studies, the mothers were observed shopping in the supermarket with their 2-year-old children. One week later they responded to multiple choice questions on a computer that simulated the experience of shopping with their children. The exact agreement between the two types of data was then assessed. The results from the first study involving 28 mothers revealed some agreement, although it was generally low. In an effort to increase the level of agreement, the computer simulation was revised to allow multiple responses and to clarify some of the simulation vigenettes. A replication study resulted in a considerably higher level of agreement for 22 mothers. Implications of this method for researchers and practitioners are discussed. 相似文献
968.
969.
Glenn A. Werner 《Behavioral Interventions》1992,7(3):199-204
An employee recognition program to improve work attendance was conducted for one year in 1986 as part of a 3-year study using the awarding and posting of attendance certificates as the primary method of employee recognition. Compared to sick leave usage during 1985, those employees in the recognition group decreased their use of sick leave by 28%. In 1987, the year following the end of the recognition program, the average sick leave returned to a level higher than the 1986 level. In addition, the sick leave of a nonintervention control group of employees showed a sequential increase each year from 1985 to 1987, with their use in 1986 being 16% greater than those employees in the employee recognition group. 相似文献
970.