全文获取类型
收费全文 | 6537篇 |
免费 | 148篇 |
国内免费 | 47篇 |
出版年
2018年 | 16篇 |
2014年 | 16篇 |
2012年 | 620篇 |
2011年 | 723篇 |
2010年 | 180篇 |
2009年 | 57篇 |
2008年 | 534篇 |
2007年 | 554篇 |
2006年 | 539篇 |
2005年 | 436篇 |
2004年 | 380篇 |
2003年 | 466篇 |
2002年 | 367篇 |
2001年 | 271篇 |
2000年 | 284篇 |
1999年 | 151篇 |
1998年 | 29篇 |
1997年 | 29篇 |
1996年 | 33篇 |
1995年 | 26篇 |
1994年 | 41篇 |
1993年 | 21篇 |
1992年 | 26篇 |
1991年 | 32篇 |
1990年 | 36篇 |
1989年 | 49篇 |
1988年 | 47篇 |
1987年 | 42篇 |
1986年 | 36篇 |
1985年 | 34篇 |
1984年 | 21篇 |
1983年 | 36篇 |
1982年 | 20篇 |
1981年 | 29篇 |
1980年 | 15篇 |
1978年 | 18篇 |
1965年 | 17篇 |
1963年 | 13篇 |
1959年 | 17篇 |
1958年 | 60篇 |
1957年 | 36篇 |
1956年 | 29篇 |
1955年 | 28篇 |
1954年 | 26篇 |
1953年 | 24篇 |
1952年 | 19篇 |
1951年 | 24篇 |
1950年 | 25篇 |
1949年 | 12篇 |
1948年 | 15篇 |
排序方式: 共有6732条查询结果,搜索用时 0 毫秒
111.
112.
113.
114.
Sixty-nine midrange responders on the Introversion-Extroversion (IE) scale of the Eysenck Personality Questionnaire (EPQ) were given an experimental measure to assess tendency toward ambivalence (i.e., both strongly introverted and strongly extraverted responses) vs. moderation (i.e., midrange responses), and degree of importance given to IE types of activities. The participants were divided into those showing ambivalence vs. those showing moderate responses, and into those reporting high vs. low importance of such activities. As was predicted, the ambivalent group showed significantly higher scores on the neuroticism scale of the EPQ, while the low importance group tended to show more psychoticism, but not to a significant degree. Both of the midrange scores were unrelated to the Bem Sex Role Inventory. Based on the findings, at least two groups are posited in the midrange of the IE dimension: an ambivalent group with mixed strong introversive and extraversive tendencies, and an ambiverted group with midrange scores. 相似文献
115.
Rorschach tests were administered to 36 subjects grouped according to ethnicity and political ideology. Pairwise discriminant analyses of scores significantly differentiated both Jewish and non-Jewish radicals from nonradicals in a manner consistent with previous survey findings. 相似文献
116.
Data from the 1970 National Fertility Study were used to investigate the relationships between sex role attitudes and the childbearing and labor force participation of women. While several relevant dimensions of sex role attitudes were identified, it was found that the most crucial aspect for working and fertility was the extent to which the woman identified the female role as that of housewife and homemaker. Those having traditional definitions concerning this role were less likely to be working, and had fewer plans to work in the future. In addition, as expected, women with traditional sex role definitions had more children than others. While the orientation of the woman toward the home was the primary correlate of work and fertility, those who felt that women had little control over their lives had higher fertility than others—a relationship which could be explained partially, but not entirely, in terms of unplanned childbearing. 相似文献
117.
Effects of fixed-ratio sample and choice response requirements upon oddity matching 总被引:2,自引:2,他引:0
下载免费PDF全文
![点击此处可从《Journal of the experimental analysis of behavior》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Three pigeons were trained on oddity matching in which either 1, 4, 8, 16, or 32 sample-key observing responses were required to turn off the sample stimuli and turn on the comparison stimuli. Oddity accuracy increased when the observing-response requirement was raised and decreased when the requirement was lowered. Next, while the observing requirement was maintained at one response, the number of responses required to the comparison stimuli was either 1, 4, 8, 16, or 32. Under these conditions, choice was defined as the comparison that first accumulated the required number of responses. In general, increasing the comparison-response requirement decreased accuracy and lowering the comparison requirement increased accuracy. The fixed-ratio observing requirements appeared to facilitate control by stimuli serving an instructional function. 相似文献
118.
Evaluated the effectiveness of the Zax Information Profile (ZIP), a personality test based on general fund of information, in discriminating between college students who sought mental health services and those who did not, Three successive classes of freshmen students at the Eastman School of Music of the University of Rochester were administered the ZIP. Help-seeking students were matched with non-help-seeking students for sex, age, and intellectual ability. The hypothesis that ZIP scores would differentiate between these two groups was supported by the data. The potential use of the ZIP as a predictor of college adjustment and as a useful entrance screening device was discussed. 相似文献
119.
120.