全文获取类型
收费全文 | 1049篇 |
免费 | 119篇 |
国内免费 | 207篇 |
专业分类
1375篇 |
出版年
2024年 | 5篇 |
2023年 | 23篇 |
2022年 | 22篇 |
2021年 | 33篇 |
2020年 | 45篇 |
2019年 | 31篇 |
2018年 | 33篇 |
2017年 | 52篇 |
2016年 | 38篇 |
2015年 | 26篇 |
2014年 | 37篇 |
2013年 | 103篇 |
2012年 | 50篇 |
2011年 | 77篇 |
2010年 | 69篇 |
2009年 | 72篇 |
2008年 | 71篇 |
2007年 | 99篇 |
2006年 | 80篇 |
2005年 | 85篇 |
2004年 | 64篇 |
2003年 | 53篇 |
2002年 | 30篇 |
2001年 | 24篇 |
2000年 | 25篇 |
1999年 | 21篇 |
1998年 | 9篇 |
1997年 | 14篇 |
1996年 | 3篇 |
1995年 | 9篇 |
1994年 | 5篇 |
1993年 | 9篇 |
1992年 | 6篇 |
1991年 | 3篇 |
1990年 | 4篇 |
1989年 | 7篇 |
1988年 | 2篇 |
1987年 | 3篇 |
1986年 | 5篇 |
1985年 | 4篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1982年 | 3篇 |
1981年 | 3篇 |
1980年 | 3篇 |
1979年 | 2篇 |
1973年 | 4篇 |
1969年 | 1篇 |
1968年 | 1篇 |
1964年 | 1篇 |
排序方式: 共有1375条查询结果,搜索用时 0 毫秒
1.
立体视觉的心理物理和VEP比较研究 总被引:2,自引:0,他引:2
心理物理试验是研究立体视觉的主要方法。70年代VEP开始用于体视研究,并取得许多结果。由于VEP信号复杂,这些结果不能令人满意。本文使用心理物理试验和VEP对比方法对体视加以研究。我们的结果是:VEP波形中第一个正峰与刺激图形的亮度有关;N_2峰和P_3峰的潜伏期对判断体视存在与否有重要价值;本试验确定N_2峰潜伏期在体视存在时约为240ms—280ms,无体视存在时约为290ms—310ms;P_3峰潜伏期在体视存在时约为280ms—310ms,无体视存在时约为340ms—360ms;体视存在时的VEP与无体视存在时的VEP的互相关系数小于0.1;有体视的VEP其功率谱密度在8Hz附近有一峰;心理物理试验中使用强制选择得到的结果从VEP波形比较中可以确认是可靠的;有体视的VEP其N_2和P_3的潜伏期随视差变化呈现规律性改变。 相似文献
2.
3.
The peak procedure was used in two experiments to study pigeons' ability to time multimodal events. In the first experiment, birds were trained to time a single event consisting of a 9-s tone or light followed by a 21-s fixed interval associated with a signal of light or tone (signal of the other modality). On occasional empty trials, different lengths of the first signal were followed by a long period of the second signal. Peak response times as a function of the duration of the first signal were linear and had a slope of close to one in all birds. This indicates that the birds were timing only the second signal. In a second experiment, two complex events were used in training. One consisted of a 9-s tone or light followed by a 21-s fixed interval associated with a light or tone. The other consisted of a 21-s tone or light followed by a 9-s fixed interval associated with a light or tone. Different durations of the first signal were again used on empty trials. Peak response times as a function of the duration of the first signal were again linear in all birds. The slope of the function was less than one but greater than zero for 3 birds. This indicates that these birds were partly timing the entire complex event of 30-s duration and partly timing only the second signal of the event. A model is proposed in which the bird takes as a criterion for timing a weighted average of different target criteria. Comparisons with the performance of rats are made. 相似文献
4.
四组中国被试的归因在维度上相对位置的评定 总被引:4,自引:0,他引:4
本文研究了中国被试对十项归因(心境、技巧、知识、机会、努力、帮助、能力、任务、偏好和运气)在五个维度(基源性、稳定性、控制性、预见性和普遍性)上相对位置的评定。并与钱德拉等人(Cbandler & Spies,1984),用美国被试所得的结果进行了比较。实验结果表明中国被试与美国被试评定的一致性达62%。此外,没有一项归因的评定是在维度的极端等极(1.0-2.0或6.0-7.0)。 相似文献
5.
AIDS prevention for intravenous drug users in the community: Street-based education and risk behavior 总被引:2,自引:0,他引:2
John K. Watters Moher Downing Patricia Case Jennifer Lorvick Yu-Teh Cheng Bonnie Fergusson 《American journal of community psychology》1990,18(4):587-596
Conducted a study of behavior change associated with a street-based AIDS education project targeted to intravenous (IV) drug users in San Francisco. Two cross-sections were sampled from drug detoxification clinics and street locations in 1986 (n = 438) and 1987 (n = 623). Significant increases were reported in the percentage of IV drug users who used bleach to decontaminate syringes, who did not share needles in past year, and in condom use. A significant reduction in an index of the number of needle-sharing partners was reported. Respondents ranked treatment program as most important source of AIDS information prior to implementation of the program, and ranked outreach workers as most important after implementation. Findings suggest that this community-based outreach program had at least some impact on knowledge about AIDS and may have led to reductions in behaviors known to transmit HIV. 相似文献
6.
本文依据马克思主义的唯物史观和唯物辩证法原理,从儿童的实际社会生活过程出发,运用系统方法论证了儿童心理发展的动力是主客体之间的结构性矛盾,而由“主体──活动──客体”三项格式构成的反馈回路系统则是心理发生发展的动力场。本文还运用儿童心理发展的控制论模型,从活动的机能性方面探讨了同化和顺应之间的平衡化动力机制,揭示了主客体之间矛盾运动的原理和过程;平衡化机制是受社会文化历史的发展规律支配的。 相似文献
7.
8.
The present study compared the moderating effect of social support on parental stress variables and mental health among three groups of parents: parents of HBV (Hepatitis B Virus) children who attended the special health kindergarten, parents of HBV children who stayed at home, and parents of healthy children who attended the ordinary kindergarten. These families resided in the city of Guangzhou. A set of questionnaires measuring parental stress and social support were given to the mothers after a one-hour interview. Results showed that parents of HBV children were significantly more stressed and psychologically at risk than parents of healthy children. They also sought help from social resources more often than the parents of healthy children. Parents of healthy children who attended the ordinary kindergarten reported the highest levels of overall social support, i.e. the number of very close friends and relatives with whom they could form close emotional attachments. Although they reported a lower number of acquaintances available, they also reported the most satisfactory relationships with the support provided by their acquaintances, lower levels of stress, fewer somatic problems, more adequate general health, and more perceived meaning in life than did parents of HBV children, and social support is one of the main influences on stress or parental health. The findings call for further research to focus on parents' well-being and social support that is helpful in addressing the needs of the family. 相似文献
9.
Stimulus control in the use of landmarks by pigeons in a touch-screen task 总被引:2,自引:1,他引:1 下载免费PDF全文
Pigeons were tested in a search task on the surface of a monitor on which their responses were registered by a touch-sensitive device. A graphic landmark array was presented consisting of a square outline (the frame) and a colored “landmark.” The unmarked goal, pecks at which produced reward, was located near the center of one edge of the frame, and the landmark was near it. The entire array was displaced without rotation on the monitor from trial to trial. On occasional no-reward tests, the following manipulations were made to the landmark array: (a) either the frame or the landmark was removed; (2) either one edge of the frame or the landmark was shifted; and (3) two landmarks were presented with or without the frame present. On these two-landmark tests, the frame, when present, defined which was the “correct” landmark. When the frame was absent, the “correct” landmark was arbitrarily determined. Results showed that pecks of 2 pigeons were controlled almost solely by the landmark, pecks of 3 were controlled primarily by the landmark but the frame could distinguish the correct landmark, and 1 bird's behavior was controlled primarily by the frame. Stimulus control in this search task is thus selective and differs across individuals. Comparisons to other search tasks and to other stimulus control experiments are made. 相似文献
10.
合作学习对小学生同伴关系、成就动机和成就影响的研究 总被引:12,自引:0,他引:12
旨在探讨在我国开展合作学习教学的可行性,以及合作学习对小学生同伴关系、成就动机和成就水平的影响,运用自然实验和测量相结合的方法,选择了北京师范大学实验小学三年级两个班进行实验研究,其中一个班为实验班(n=35),另一个班为控制班(n=37).实验为期三个月。结果表明:合作学习在小学教学中不但是可行的,而且效果较为显著;合作学习对同伴关系的改善有着积极的影响,学生间的接纳度和被接纳度都有普遍的提高;合作学习在较大程度上激发了学生的成就动机水平,学生对合作学习的课程兴趣明显提高.成绩较差的学生表现得更为明显;合作学习对提高学生的学习成绩有一定的促进作用。 相似文献