全文获取类型
收费全文 | 55794篇 |
免费 | 947篇 |
国内免费 | 4篇 |
专业分类
56745篇 |
出版年
2020年 | 759篇 |
2019年 | 957篇 |
2018年 | 1084篇 |
2017年 | 1082篇 |
2016年 | 1336篇 |
2015年 | 981篇 |
2014年 | 963篇 |
2013年 | 4659篇 |
2012年 | 1696篇 |
2011年 | 1871篇 |
2010年 | 1092篇 |
2009年 | 1106篇 |
2008年 | 1684篇 |
2007年 | 1647篇 |
2006年 | 1465篇 |
2005年 | 1324篇 |
2004年 | 1301篇 |
2003年 | 1195篇 |
2002年 | 1227篇 |
2001年 | 1776篇 |
2000年 | 1670篇 |
1999年 | 1285篇 |
1998年 | 697篇 |
1997年 | 609篇 |
1996年 | 540篇 |
1995年 | 547篇 |
1994年 | 528篇 |
1993年 | 546篇 |
1992年 | 1036篇 |
1991年 | 974篇 |
1990年 | 962篇 |
1989年 | 865篇 |
1988年 | 827篇 |
1987年 | 821篇 |
1986年 | 818篇 |
1985年 | 876篇 |
1984年 | 679篇 |
1983年 | 599篇 |
1982年 | 484篇 |
1979年 | 673篇 |
1978年 | 504篇 |
1976年 | 462篇 |
1975年 | 596篇 |
1974年 | 628篇 |
1973年 | 603篇 |
1972年 | 542篇 |
1971年 | 480篇 |
1968年 | 541篇 |
1967年 | 546篇 |
1966年 | 478篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
Janice G. Derrickson Nancy A. Neef John M. Parrish 《Journal of applied behavior analysis》1991,24(3):563-570
We examined the effectiveness of using dolls to teach young children with tracheostomies to self-administer a suctioning procedure. Four children between the ages of 5 and 8 years, who had had tracheostomies for 6 months or longer, participated. After skills were taught via doll-centered simulations, in vivo skills were evaluated. All of the training and probe sessions were conducted in the participants' classrooms or homes. Results of a multiple baseline design across subjects and skill components indicated that the performance of all children improved as a function of training. Skill maintenance was demonstrated by all participants during follow-up assessments conducted 2 to 6 weeks posttraining. Results of a questionnaire completed by caregivers and interviews with the children revealed high levels of satisfaction with the training procedures and outcomes. 相似文献
992.
In this study, we examined variations in fathering and father-child relationships from the children's preschool years through mid-adolescence. One hundred seventy-seven fathers with first-born children ages 4, 8, 12, and 16 years responded to five sets of questionnaires tapping four domains of childrearing: practices, attitudes, parental role involvement, and role satisfaction. A multivariate analysis of variance identified significant variability among the four age groups in fathers' use of acceptance in childrearing practices, role involvement (frequency and task sharing), satisfaction with paternal role performance, and attitudes about the modifiability of child behavior. The results contribute new information about the nature of fathering throughout the childhood years and adolescence and provide additional support for the view of parenting as dynamic and responsive to the developmental level and gender-related characteristics of the child. 相似文献
993.
S A Graham-Bermann 《The Journal of genetic psychology》1991,152(2):207-216
The ways in which middle-childhood siblings perceive themselves as similar or different was assessed with a sample of 40 pairs of 9- to 11-year-old (younger) and 12- to 14-year-old (older) siblings. Each child was interviewed and completed a card sort procedure and a measure of self-competence. Sibling pairs participated in three behavioral tasks coded for cooperation and conflict. Self-ratings, self-perceptions, and sibling behavior were analyzed for their association with the perceived similarity construct. Siblings perceived themselves as being more like one another than did their mothers. Forty-one percent of the variance in their perceived similarity was accounted for by paired self-cooperation ratings, social competence, and behavioral task scores. 相似文献
994.
Three experiments investigated the influence of an after-contraction phenomenon on the performance and learning of a dynamic force-production task. The after-contraction effect refers to an involuntary potentiation (induced by a sustained precontraction) that is thought to summate with voluntary motor commands to bias subsequent responding. The precontraction involved a brief (20 s) static contraction. The subsequent influence of the precontraction on a dynamic force-production task was assessed. Experiments 1 and 2 were aimed at demonstrating the direct impact of the precontraction intensity on the magnitude and decay of the after-contraction effect. The results indicated that as the intensity of the precontraction increased, the magnitude of the induced bias increased. In Experiment 3, the indirect influence on subsequent retention of varying the precontraction intensity during acquisition was investigated. The results indicated that the performance of subjects experiencing varying precontraction intensities during acquisition was inferior to that of subjects experiencing a constant precontraction intensity, but the performance of the varied precontraction intensities group was superior on the test of retention. It is noted that the paradoxical reversal from acquisition to retention is similar to that found in contextual interference experiments and may arise from similar mechanisms. 相似文献
995.
A course on cotherapy for mental health practitioners is described. The authors strongly recommend that clinicians from all disciplines be taught and trained to do cotherapy, since it is a highly effective therapeutic modality in treating individuals, families and groups. 相似文献
996.
997.
998.
999.
Confusing one person with another: what errors reveal about the elementary forms of social relations 总被引:2,自引:0,他引:2
Seven studies investigated the cognitive structure of social relationships exhibited in the patterns of substitutions that occur when people confuse a person with another. The studies investigated natural errors in which people called a familiar person by the wrong name, misremembered with whom they had interacted, or mistakenly directed an action at an inappropriate person. These studies tested the relational-models theory of A. P. Fiske (1990b, 1991) that people use 4 basic models for social relationships. All 7 studies provide support for the theory; Ss tend to confuse people with whom they interact in the same basic relationship mode. In addition, Ss confuse people of the same gender. Other factors (age, race, role term, similarity of names) generally have smaller, less reliable effects, indicating that the 4 elementary modes of relationships are among the most salient schemata in everyday social cognition. 相似文献
1000.
Preschoolers' understanding of sequential relations was investigated in two experiments. Experiment 1 showed that appreciation of sequential relations depends on the level of mental ability and the degree of familiarity displayed with the social or behavioral phenomena under investigation. Experiment 2 reproduced the findings of Experiment 1 and, further, demonstrated that an increase in experience and familiarity through an interaction phase between children with higher and those with lower mental abilities led to a significant exchange of information and performance that was retained over the posttest phase. The data of both experiments are discussed within the framework of the "invariance hypothesis" (Bullock, 1985) in contrast to Piagetian theory (Piaget, 1946/1969). 相似文献