全文获取类型
收费全文 | 2156篇 |
免费 | 98篇 |
出版年
2021年 | 13篇 |
2020年 | 31篇 |
2019年 | 42篇 |
2018年 | 35篇 |
2017年 | 45篇 |
2016年 | 74篇 |
2015年 | 42篇 |
2014年 | 40篇 |
2013年 | 278篇 |
2012年 | 84篇 |
2011年 | 91篇 |
2010年 | 55篇 |
2009年 | 61篇 |
2008年 | 61篇 |
2007年 | 103篇 |
2006年 | 74篇 |
2005年 | 78篇 |
2004年 | 77篇 |
2003年 | 77篇 |
2002年 | 76篇 |
2001年 | 31篇 |
2000年 | 42篇 |
1999年 | 44篇 |
1998年 | 35篇 |
1997年 | 34篇 |
1996年 | 33篇 |
1995年 | 44篇 |
1994年 | 33篇 |
1993年 | 29篇 |
1992年 | 29篇 |
1991年 | 26篇 |
1990年 | 34篇 |
1989年 | 20篇 |
1988年 | 13篇 |
1987年 | 18篇 |
1986年 | 18篇 |
1985年 | 20篇 |
1984年 | 20篇 |
1983年 | 26篇 |
1982年 | 32篇 |
1981年 | 21篇 |
1980年 | 22篇 |
1979年 | 17篇 |
1978年 | 23篇 |
1977年 | 18篇 |
1976年 | 15篇 |
1975年 | 16篇 |
1974年 | 19篇 |
1973年 | 16篇 |
1972年 | 15篇 |
排序方式: 共有2254条查询结果,搜索用时 15 毫秒
31.
Fixation positions were measured for a variety of simple patterns. Generally, the spontaneous fixation tendencies hovered near the “center-of-gravity” of the pattern, providing that the overall dimensions of the figure were less than about 5 deg. “Open” figures such as angles were found to be roughly equivalent to their “enclosed” counterparts, such as triangles. The constraints imposed by the pattern upon the fixation tendencies occur at a level where the binocular inputs are processed. Of further importance was the fact that the fixation points approximate the foci observed in the same patterns when they are seen against a background of visual noise. It is suggested that the two results may be functionally related.. 相似文献
32.
James M. Richards Leonard P. Rand Lorraine M. Rand 《Journal of counseling and development : JCD》1967,45(10):987-992
This study examines the geographical distribution of various junior college characteristics. Scores for 6 factors or categories of college characteristics, identified in earlier ACT research, were computed for each of 581 accredited junior colleges. When these junior colleges were classified and analyzed by geographical region, significant differences were found among regions on all 6 factors—Cultural Affluence (or Private Control), Technological Specialization, Size, Age (or Conventionalism), Transfer Emphasis, and Business Orientation (or High Cost). The regional differences are discussed and implications are suggested for research and counseling as well as for junior college planning. 相似文献
33.
The disambiguation of threat/neutral homophones was investigated in high- and low-trait anxiety subjects who had been exposed
to either a positive or a negative mood manipulation procedure. Subjects were required first to spell each auditorily presented
word and second, to generate and speak a sentence using the word. Difference indices were calculated for the spelling and
the sentence usage data, i.e. the number of threat minus neutral interpretations. Examination of these indices revealed that
subjects exposed to the negative mood manipulation procedure produced relatively more threat than neutral interpretations
(for both spelling and sentence usage) than did subjects exposed to the positive mood manipulation procedure. Multiple regression
analyses revealed that both the trait anxiety and mood manipulation variables contributed significantly to the prediction
of the difference index on the spelling task. In the analysis of the use of homophones in sentences, only the mood manipulation
variable contributed significantly to the prediction of the difference index on the sentence usage task. 相似文献
34.
35.
Kimberly Hoagwood Ph.D. Ann A. Hohmann Ph.D. M.S.P.H. 《Journal of child and family studies》1993,2(3):259-268
This article describes an important new area of research on services for children and adolescents with mental disorders at the National Institute of Mental Health, the parameters of mental health services research for youth, and the opportunities that are available for grant-funded investigations in this area. 相似文献
36.
37.
This study is one of a series of investigations examining the contribution of sex roles to the development of depression within a learned helplessness framework. Utilizing 143 pairs of undergraduate female participants, the present study explored subjects′ abilities to gain and maintain control in an interpersonal context. Interpersonal control was operationalized as successful persuasion in a two-person discussion task, wherein one participant had hidden instructions to be maximally persuasive in discussing a questionnaire about social behavior. The results indicated that less successful persuasion was associated with increases in depressed mood. Furthermore, women with high masculinity and low femininity were able to gain interpersonal control regardless of the sex role of their partner. The results also suggested that high femininity is associated both with giving up control in interpersonal tasks and with increases in depressed mood when one is faced with the task of exerting interpersonal control. The findings were interpreted in terms of the importance of sex role characteristics in learned helplessness and depression. 相似文献
38.
Ecology of depression in late childhood and early adolescence: a profile of daily states and activities 总被引:2,自引:0,他引:2
R W Larson M Raffaelli M H Richards M Ham L Jewell 《Journal of abnormal psychology》1990,99(1):92-102
This study investigated daily states and time use patterns associated with depression. Four hundred eighty-three 5th to 9th graders reported on their experience when signalled by pagers at random times. Depressed youth reported more negative affect and social emotions, lower psychological investment, lower energy, and greater variability in affect. These differences were weaker for 5th and 6th graders, suggesting that self-reported feeling states are a poor indicator of depression prior to adolescence. No differences were found in the daily activities of depressed youths nor in the amount of time spent alone, but depressed youths experienced other people as less friendly and more often reported wanting to be alone, especially when with their families. They also spent less time in public places and more time in their bedrooms. Finally, depressed boys, but not girls, spent much less time with friends, particularly of the same sex, suggesting that social isolation is more strongly associated with depression for boys. 相似文献
39.
The concurrent validity of the motor domain from the Vineland Adaptive Behavior Scales was estimated using scores from the Peabody Developmental Motor Scales as criteria. A moderately high correlation between the measures was obtained. Implications, particularly for preschool children, were discussed. 相似文献
40.