全文获取类型
收费全文 | 17383篇 |
免费 | 842篇 |
国内免费 | 15篇 |
出版年
2020年 | 234篇 |
2019年 | 252篇 |
2018年 | 366篇 |
2017年 | 376篇 |
2016年 | 377篇 |
2015年 | 291篇 |
2014年 | 316篇 |
2013年 | 1368篇 |
2012年 | 580篇 |
2011年 | 665篇 |
2010年 | 385篇 |
2009年 | 356篇 |
2008年 | 482篇 |
2007年 | 468篇 |
2006年 | 410篇 |
2005年 | 346篇 |
2004年 | 358篇 |
2003年 | 333篇 |
2002年 | 348篇 |
2001年 | 711篇 |
2000年 | 715篇 |
1999年 | 471篇 |
1998年 | 186篇 |
1997年 | 184篇 |
1996年 | 143篇 |
1995年 | 147篇 |
1993年 | 145篇 |
1992年 | 367篇 |
1991年 | 325篇 |
1990年 | 358篇 |
1989年 | 340篇 |
1988年 | 326篇 |
1987年 | 293篇 |
1986年 | 318篇 |
1985年 | 304篇 |
1984年 | 239篇 |
1983年 | 206篇 |
1981年 | 136篇 |
1979年 | 194篇 |
1978年 | 165篇 |
1975年 | 192篇 |
1974年 | 244篇 |
1973年 | 201篇 |
1972年 | 207篇 |
1971年 | 173篇 |
1970年 | 149篇 |
1969年 | 202篇 |
1968年 | 203篇 |
1967年 | 164篇 |
1966年 | 194篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
151.
Short-term memory for actions was investigated for young adult and elderly adult subjects with the Brown-Peterson procedure at retention intervals of 0 and 15 s. The short-term memory trials were followed by the long-term recall of the prior to-be-remembered actions. The 15-s retention interval was filled either with no activity or with 1 of 3 different interfering activities. Verbal interference had little effect on short-term memory at either age level. Actions performed in the interval either by the subjects or by the experimenter produced significantly lower recall scores at each age level, with the decrement being more pronounced for the elderly than for the young subjects. The long-term memory results indicated that successful short-term recall enhanced later long-term recall, regardless of age level. 相似文献
152.
153.
Dolores Subia BigFoot-Sipes Paul Dauphinais Teresa D. LaFromboise Sandra K. Bennett Wayne Rowe 《Journal of multicultural counseling and development》1992,20(3):113-122
Researchers examined the importance of similar ethnicity and the preference for a counselor of the same sex among American Indian secondary school students. 相似文献
154.
This study investigated the relationship between intergenerational family relationships and Frankl's concept of meaning in life. Intergenerational family relationships were measured by the Personal Authority in the Family System Questionnaire (PAFS-QE) by Bray, Williamson, and Malone. The meaning in life variables were measured by the Life Attitude Profile-Revised (LAP-R) by Reker. This quantitative study, using the BMDP Statistical Package (Dixon, 1990), correlated the scores on various subscales from both instruments, resulting in seven statistically significant relationships. The findings, although modest, suggest the existence of a relationship between these two theoretical areas.This article is based in part on the first author's doctoral dissertation at Texas Woman's University.A copy of the PAFS-Q may be obtained from: James H. Bray, PhD, 5510 Greenbriar, Houston, TX 77005. A copy of the LAP-R may be obtained from: Gary Reker, PhD, Trent University, Psychology Department, Peterborough, Ontario Canada K9J 7B8. 相似文献
155.
156.
John W. Schuster Ed.D. Ann K. Griffen B.S. Mark Wolery Ph.D. 《Journal of Behavioral Education》1992,2(3):305-325
Simultaneous prompting (a type of antecedent prompt and test procedure) and constant time delay were compared with four students with moderate mental retardation learning expressive sight words. A parallel treatments design across word sets and replicated across students was used. For acquisition, the simultaneous prompting procedures required fewer trials, sessions, and training time to criterion and resulted in fewer student errors during daily probe and training sessions. However, maintenance data indicated mixed results across the two procedures. Reliability data (both dependent and independent variables) revealed no differences between the two procedures in terms of the teacher's accuracy in recording student responses and implementing each procedure. Future research issues are discussed. 相似文献
157.
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
158.
Chloee K. Poag Ph.D. Robert Cohen Ph.D. Scott W. Henggeler Ph.D. Mary B. Summerville Ph.D. Glen E. Ray M.S. 《Journal of child and family studies》1992,1(3):287-303
The purpose of this research was to examine the relationship between parents' perceptions of marital satisfaction and family stress and their third grade children's classroom behavior. Twenty-one married couples completed questionnaires during home visits. Behavior observations were made from videotapes of children recorded in their classroom during lunch and group academic periods on each of three days. Frequencies of peer interactions, solitary behaviors, and teacher interactions were coded. Regression analyses showed that mothers' level of marital satisfaction (but not fathers') predicted their children's frequency of peer interactions during lunch. Fathers' level of perceived family stress (but not mothers') predicted their children's frequency of peer interactions during lunch. Neither measure for either parent was related to the frequency of peer interactions, solitary behaviors, or teacher interactions observed during the academic sessions. These findings highlight the importance of assessing the potential differential relation of parent variables to children's trans-situational behaviors, and the examination of these variables in relation to different social-environmental contexts in which children participate outside the home. 相似文献
159.
Takeo Watanabe George L. Zimmerman Patrick Cavanagh 《Attention, perception & psychophysics》1992,52(2):161-166
We examined whether the orientation-contingent color aftereffect (the McCollough effect) could be mediated by subjective horizontal and vertical structure induced by the perception of transparency. In our experiments, red vertical bars and green horizontal bars were alternated as an adapting stimulus. After adaptation, subjects (n=6) were asked to adjust the green and red saturation of a test pattern until they obtained a neutral gray. Horizontal and vertical stripes were combined in the test pattern in three different ways: (1) overlapping with a luminance combination that gave rise to a perception of transparent overlays of horizontal and vertical stripes (valid transparency condition), (2) overlapping with luminance combinations that did not induce a perception of transparency (invalid transparency condition) and that appeased more as a patchwork of checks, and (3) presented in adjacent, nonoverlapping areas. Our results showed that the McCollough effect was significantly greater in the valid transparency condition than in the invalid transparency conditions. The effect in the valid transparency condition was nevertheless less strong than was the effect seen with the standard test stimulus made up of nonoverlapping vertical and horizontal stripes, Our results suggest that the McCollough effect can be mediated by the subjective spatial organization (inner representation of vertical and horizontal stripes) that accompanies the perception of transparency in our stimulus. 相似文献
160.
This paper studies a class of infinite-valued predicate logics. A sufficient condition for axiomatizability of logics from that class is given.To the memory of Jerzy Supecki 相似文献