全文获取类型
收费全文 | 2344篇 |
免费 | 143篇 |
国内免费 | 1篇 |
专业分类
2488篇 |
出版年
2020年 | 27篇 |
2019年 | 27篇 |
2018年 | 44篇 |
2017年 | 39篇 |
2016年 | 70篇 |
2015年 | 54篇 |
2014年 | 66篇 |
2013年 | 338篇 |
2012年 | 66篇 |
2011年 | 75篇 |
2010年 | 48篇 |
2009年 | 69篇 |
2008年 | 58篇 |
2007年 | 61篇 |
2006年 | 51篇 |
2005年 | 29篇 |
2004年 | 47篇 |
2003年 | 49篇 |
2002年 | 48篇 |
2001年 | 39篇 |
2000年 | 35篇 |
1999年 | 31篇 |
1998年 | 37篇 |
1997年 | 29篇 |
1996年 | 35篇 |
1994年 | 34篇 |
1993年 | 34篇 |
1992年 | 32篇 |
1991年 | 29篇 |
1990年 | 30篇 |
1989年 | 33篇 |
1988年 | 35篇 |
1987年 | 26篇 |
1986年 | 30篇 |
1985年 | 31篇 |
1984年 | 30篇 |
1983年 | 31篇 |
1982年 | 35篇 |
1981年 | 37篇 |
1980年 | 28篇 |
1979年 | 36篇 |
1978年 | 27篇 |
1976年 | 25篇 |
1975年 | 26篇 |
1974年 | 33篇 |
1971年 | 22篇 |
1969年 | 21篇 |
1968年 | 21篇 |
1967年 | 21篇 |
1966年 | 29篇 |
排序方式: 共有2488条查询结果,搜索用时 15 毫秒
41.
42.
43.
Two monkeys were trained on an escape-avoidance procedure in which a lever press delayed exposure to wind by 20 sec. For 5 hr, subjects alternately worked 15 min and rested 15 min, and performed this schedule when the wind was 5, 10, and 20 mph and the temperatures were 50, 60, and 70° F. Analysis of variance showed that the percent of wind avoided was related to both the velocity of the wind and the temperature during the exposure. When the wind was 10 and 20 mph it was avoided almost continuously regardless of the temperature. 相似文献
44.
45.
Edward C. Watkins Jr. 《Counselling psychology quarterly》1993,6(1):59-67
This paper examines the effects of person-centered theory on contemporary psychological testing. Seven basic ideas or assumptions, which are integral to and guide the testing process, are identified and briefly discussed. Each idea is considered to have been affected either directly or indirectly by person-centered philosophy. Some of the ways in which these ideas are reflected in contemporary testing practice are indicated. 相似文献
46.
The structure of a course entitled Family Therapy with Major Psychopathology taught annually in the Mercer University Graduate Marriage and Family Therapy Program is presented. An epistemological presentation regarding the interface of psychiatric nosology and family systems assessment is discussed. Methods of diagnosing and assessing dysfunctional family systems are presented and training in individual psychiatric nosology is discussed, with particular attention given to family systems dysfunction as an etiological factor in the development of individual psychopathology. Learning techniques are discussed including lecture, discussion, case presentations, readings, and testing methods. 相似文献
47.
48.
Genetic and Environmental Effects on Openness to Experience, Agreeableness, and Conscientiousness: An Adoption/Twin Study 总被引:4,自引:0,他引:4
C. S. Bergeman Heather M. Chlpuer Robert Plomin Nancy L. Pedersen G. E. McClearn John R. Nesselroade Paul T. Costa Jr. Robert R. McCrae 《Journal of personality》1993,61(2):159-179
ABSTRACT Previous research has indicated that extraversion and neuroticism are substantially affected both by genotype and environment. This study assesses genetic and environmental influences on the other three components of the five-factor model of personality: Openness to Experience, Agreeableness, and Conscientiousness. An abbreviated version of the NEO Personality Inventory (NEO-PI) was administered to 82 pairs of identical twins and 171 pairs of fraternal twins reared apart and 132 pairs of identical twins and 167 pairs of fraternal twins reared together. Estimates of genetic and environmental effects for Openness and Conscientiousness were similar to those found in other studies of personality: Genetic influence was substantial and there was little evidence of shared rearing environment. Results for Agreeableness were different: Genetic influence accounted for only 12% of the variance and shared rearing environment accounted for 21% of the variance. Few significant gender or age differences for genetic and environmental parameters were found in model-fitting analyses. 相似文献
49.
The purpose of this research was to determine the role of syllabic stress in language processing during the early on-line processing of speech and later in the representation of a sentence in memory. Experiment 1 used a syllable monitoring task while Experiment 3 used a probe task in which subjects heard a sentence and then were asked to determine whether a probe syllable had occurred in the sentence. In the monitoring task, stressed syllables were detected more rapidly in word-initial position, but unstressed syllables were detected more rapidly in word-final position. Stress facilitation in initial syllables was strongly related to high relative F0, but not to changes in perceived vowel quality as assessed in Experiment 2. This pattern is interpreted as evidence that lexical stress is used on-line to guide lexical access and/or lexical segmentation. The probe task of Experiment 3 showed stress facilitation in both positions, indicating that stress is independently retained in the postperceptual representation of a sentence.The research reported in this paper was supported by grant 80-0416 to Harvard University (Peter C. Gordon, Principal Investigator) from the Air Force Office of Scientific Research Life Sciences Directorate. We thank Chris Thurber for his extensive and competent assistance in testing subjects and making acoustic measurements, and Jay Rueckl for comments on an earlier version of this paper 相似文献
50.
Eric Stice Manuel Barrera Jr. Laurie Chassin 《Journal of abnormal child psychology》1993,21(6):609-629
Past research has generated inconsistent findings regarding the relation of parental control and support to adolescent problem behaviors. Using two waves of data collected 1 year apart, the current study examined the influence of parental control and support on adolescents' externalizing symptoms, alcohol use, and illicit substance use. A sample of adolescents and their parents (@#@ N =454) was studied, within which approximately half of the adolescents were at high risk because of parental alcoholism. Multipleregression analyses of crosssectional data showed a negative quadratic relation between parental control and adolescent externalizing symptomatology, and between parental control and adolescent illicit substance use. Parental control had a negative linear relation to adolescent alcohol use. Parental support showed a negative quadratic relation to adolescent illicit substance use, and negative linear relations to adolescent alcohol use and externalizing symptoms. Although longitudinally adjusted contemporaneous results were consistent with crosssectional findings, parental support and control were prospectively related only to adolescent alcohol use. The quadratic relations suggest that adolescents who receive either extreme of parental support or control are at risk for problem behaviors. 相似文献