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   3260篇
  免费   142篇
  国内免费   3篇
  3405篇
  2020年   40篇
  2019年   52篇
  2018年   85篇
  2017年   64篇
  2016年   82篇
  2015年   41篇
  2014年   55篇
  2013年   321篇
  2012年   102篇
  2011年   125篇
  2010年   77篇
  2009年   74篇
  2008年   110篇
  2007年   110篇
  2006年   103篇
  2005年   101篇
  2004年   89篇
  2003年   90篇
  2002年   71篇
  2001年   67篇
  2000年   59篇
  1999年   49篇
  1998年   56篇
  1997年   36篇
  1996年   39篇
  1995年   39篇
  1994年   36篇
  1993年   31篇
  1992年   40篇
  1991年   76篇
  1990年   40篇
  1989年   44篇
  1988年   41篇
  1987年   45篇
  1986年   39篇
  1985年   34篇
  1983年   32篇
  1982年   39篇
  1981年   54篇
  1979年   45篇
  1978年   46篇
  1977年   50篇
  1976年   42篇
  1975年   40篇
  1974年   35篇
  1973年   42篇
  1971年   31篇
  1970年   30篇
  1968年   33篇
  1967年   39篇
排序方式: 共有3405条查询结果,搜索用时 15 毫秒
21.
At the work site, smoking accounts for increased health care expenses and worker absenteeism due to smoking-related illness and reduced productivity and lost wages. Developing comprehensive and accessible smoking cessation programs at the work site is an important objective for health care professionals. In this study, employees of 43 corporations participated in a televised smoking cessation program accompanied by self-help manuals. The media component involved presenting a smoking cessation program on a network television affiliate station during the 4:30 p.m. and 10:00 p.m. news for 20 days. Employees at half the corporations also had access to semiweekly self-help group meetings. Adding self-help support groups to a program involving self-help manuals and the media reports was found to significantly increase abstinence and its maintenance over time. The implications of using the media, self-help groups, and work site locations in large-scale community-based interventions are discussed.  相似文献   
22.
This project examined psychosocial characteristics of 24 preschool-aged siblings of handicapped children in relation to a control group of 22 siblings of nonhandicapped children. Subjects were matched on family size and income, sibling age, birth order, sex, age spacing, and marital status of their parents. Results indicated no statistically significant differences between groups of children on measures of perceived self-competence and acceptance, understanding of developmental disabilities, empathy, and child care responsibility. Significant group differences were found where brothers of handicapped children were rated by their mothers as being more depressed and aggressive than brothers of nonhandicapped control children. Sisters of handicapped children were rated by mothers as being more aggressive than sisters of nonhandicapped children. Sisters of handicapped children and brothers of nonhandicapped children had significantly fewer privileges and more restrictions on their home activities than other groups. Results are discussed in relation to previous research on older silbings of handicapped children and the general literature on family stress and childhood disability and disease. The importance of examining sibling functioning via multiple measures of child behavior is stressed.The authors are grateful to the children and families who participated in the project. The assistance of Dr. Ricardo Barrera, Christine DiBlasio, Lisa Kaye, Paola Bellabarba, Jeanne Logozzo, Donna Motley, Jennifer Harter, and Tina Meisell is also gratefully acknowleged. This project was funded by Grant Number G008300345 from the U.S. Department of Education.  相似文献   
23.
24.
All 51 jurisdictions in the United States require physicians to report suspected child abuse. In most jurisdictions, reporting requirements override both confidentiality and privilege associated with the physician-patient relationship. The authors review the literature relevant to the conflict between privacy and reporting abuse and report the results of a national survey of therapists at sex offender treatment units. They discuss ethical problems experienced under these statutes by therapists who attempt to provide treatment for sex offenders, and by therapists who are required to report past instances of child abuse even when there is no evidence of ongoing abuse.  相似文献   
25.
Previous research has failed to demonstrate unambiguously the relative stability across time and consistency across tasks of individual differences in categorization, or categorization breadth The present study of categorizing behavior in college students assesses breadth at each of four points in time over a six-week period Results are consistent with an interpretation of breadth as a highly stable individual difference variable, but one that is constrained by the nature of the stimulus sets employed High stability coefficients were observed for each of two redundant tasks In contrast, cross-task consistency indices were generally low Personality correlates of breadth were similarly weak and inconsistent Several variables are suggested that may attenuate the generality of categorization breadth The existence of multiple styles of categorization is discussed  相似文献   
26.
Timecourse of coactivation in bimodal divided attention   总被引:7,自引:0,他引:7  
  相似文献   
27.
Dating experiences, especially the type or stage of dating, have consistently been found to be related to premarital sexual behavior. Findings regarding the age at 1st date and sexual behavior have been less consistent. This paper examined the age at which dating began and the type of dating relationship as correlates of premarital sexual attitudes and behavior among mid-teen adolescents. The analyses were based on a sample of high school students (n=836), most of whom were between the ages of 15 and 18 when the surveys were conducted. Early dating, especially early steady dating, was related to permissive attitudes and to premarital sexual experience among both males and females. The relationship between early dating and intercourse experience was particulary strong among Mormons, a religious group which has institutionalized age 16 as the legitimate age to begin dating.  相似文献   
28.
The increasing focus on information technology has led to widespread growth in the use of microcomputer systems in counselling settings. While many applications depend on expensive and sophisticated equipment, the humble home computer has many facilities to offer. High resolution graphics and versatile control interfacing, designed for games use, enable easy adaptation to tasks such as visual presentation of biofeedback with the facility for data retention and analysis. A pilot system based on the Commodore 64 is described.  相似文献   
29.
Two experiments showed the influence of perceptual set on the perception of subjective contours. In the first, the perceived shape of a subjective-contour figure (a minimal version of the Ehrenstein configuration) was varied by altering the observer’s viewing set. The second experiment showed that apparent depth emerged in subjective-contour figures when observers were set to perceive the illusory contours.  相似文献   
30.
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