全文获取类型
收费全文 | 2612篇 |
免费 | 103篇 |
国内免费 | 1篇 |
专业分类
2716篇 |
出版年
2023年 | 20篇 |
2021年 | 23篇 |
2020年 | 51篇 |
2019年 | 65篇 |
2018年 | 86篇 |
2017年 | 74篇 |
2016年 | 70篇 |
2015年 | 67篇 |
2014年 | 58篇 |
2013年 | 268篇 |
2012年 | 102篇 |
2011年 | 105篇 |
2010年 | 73篇 |
2009年 | 59篇 |
2008年 | 86篇 |
2007年 | 101篇 |
2006年 | 89篇 |
2005年 | 58篇 |
2004年 | 75篇 |
2003年 | 52篇 |
2002年 | 49篇 |
2001年 | 125篇 |
2000年 | 120篇 |
1999年 | 82篇 |
1998年 | 20篇 |
1997年 | 29篇 |
1996年 | 24篇 |
1994年 | 20篇 |
1993年 | 14篇 |
1992年 | 43篇 |
1991年 | 58篇 |
1990年 | 39篇 |
1989年 | 44篇 |
1988年 | 44篇 |
1987年 | 29篇 |
1986年 | 18篇 |
1985年 | 27篇 |
1984年 | 24篇 |
1983年 | 19篇 |
1982年 | 14篇 |
1981年 | 16篇 |
1979年 | 21篇 |
1976年 | 16篇 |
1974年 | 16篇 |
1973年 | 16篇 |
1971年 | 18篇 |
1970年 | 14篇 |
1969年 | 15篇 |
1968年 | 16篇 |
1967年 | 16篇 |
排序方式: 共有2716条查询结果,搜索用时 15 毫秒
31.
Questionnaires concerning attitudes toward use of microcomputers at home, in school, and at video arcades were administered to 879 high school students. Direct observations of adolescent proxemics and sex differences, and of various parameters of video games in 18 video arcades were made. A thorough and representative content analysis of sex bias of microcomputer software advertising brochures was carried out. Results supported previous findings of overrepresentation of masculine culture in the adolescent world of microcomputers, particularly regarding video games. Various types of computer-related activity were not related to socioeconomic class of the parents or to academic grades except for use of home microcomputers, which was mildly positively related to socioeconomic class (r = .124, p less than .001). Nearly half the activity in the arcades was strictly solitary. None of the arcade video games allowed for cooperative play. Most allowed only for sequential competition (86%) or simultaneous competition (7%); as many as 7% did not provide a display of the scores for a second player. 相似文献
32.
Y. Haruki T. Shigehisa K. Nedate M. Wajima R. Ogawa 《International journal of psychology》1984,19(1-4):527-545
Effects of new types of reinforcement, alien type and alien combined with external type (double reinforcement), were examined in comparison with a conventional external one. One hundred and twenty children, 6th grade boys and girls, worked on learning discrimination tasks. Under alien reinforcement, upon correct responses of the child the experimenter received reinforcers from him-(or her-) self thus reinforcing the child responses. Under each condition, alien, external or double, children learned the tasks and their learning efficacy increased. Personality characteristics of children, in terms of extraversion and emotionality, differentiated effects of three reinforcement conditions on learning behavior and efficacy. The effect of alien reinforcement was influenced by the personality factors most, and that of double reinforcement least. In addition, personality factors influenced differently between alien and external conditions. Learning occurred differently under three different conditions of reinforcement, depending on the personality type of learners. Underlying mechanisms of alien reinforcement were different from, and its functions were independent of, those of external reinforcement. None of the effects of alien reinforcement on learning and motivation were contaminated by the intellectual faculties of learners. 相似文献
33.
Farnaz Kaighobadi Jacob Shane Erika Y. Niwa Tanzina Ahmed Laura C. Reigada 《Social and Personality Psychology Compass》2023,17(8):e12790
COVID-19 vaccine concerns remain high among Americans. Although recent studies have investigated the sociodemographic disparities in vaccine concerns, less attention has been given to reasons for vaccine skepticism and psychosocial factors that may explain it. The current study examined specific types of vaccine concerns among a diverse sample of college students (N = 1985) living in New York City. Participants who identified as Black, younger, with later immigrant generational status, and those with more conservative political leanings reported more vaccine concerns. Concerns regarding vaccine side effects were the most frequently reported source of concern. Reason for getting vaccinated, personal experiences with COVID, and COVID stress was also associated with vaccine concerns. Study results emphasize the importance of sociodemographic factors and COVID knowledge and stress in examining and addressing vaccine concerns. 相似文献
34.
35.
36.
37.
Contact hypothesis in ethnic relations 总被引:14,自引:0,他引:14
Y Amir 《Psychological bulletin》1969,71(5):319-342
38.
Donna Y. Ford J. John Harris James M. Schuerger 《Journal of counseling and development : JCD》1993,71(4):409-417
A review of the literature suggests that a paucity of information exists regarding how culture-specific issues such as being both Black and gifted influence the psychological needs and personality development of gifted Black students. Stellar attempts, however, are currently underway to develop theories and perspectives of racial identity development among Black students. These theories and perspectives are discussed in an attempt to understand and address the psychological and social needs of gifted Black students. 相似文献
39.
F Y Doré 《Canadian journal of psychology》1990,44(3):359-370
An invisible displacement test was administered to cats in order to test the hypothesis that search behaviour in this species is influenced by their limited capacity for object permanence as well as by their previous experience with the environment. Experiment 1 compared three groups of cats in a five-choice hiding task in which the hiding places could be discriminated by their spatial positions. Two groups received a visible displacement training before the invisible displacement test and one group did not. Experiment 2 compared two groups of trained subjects in the same task, but the hiding places could be discriminated by spatial and visual cues. The results confirmed that cats are unable to solve problems with invisible displacements. The visible displacement training improved their performance, but was not sufficient to make them succeed. Experience with the hiding potential of the covers also gives more persistence to search behaviour. Finally, the distribution of search attempts is not determined by the proximity to the target and is influenced only partially by the subjects' previous experience. Like Stage 5 infants, cats rely mainly on their immediate perception. They search for an object in the last location they have seen it disappear or under the nearest cover from this location. 相似文献
40.
The present study investigates effects of different types of instructions (high-rate, interval, and minimal) during training with a fixed-interval schedule as a function of prior acquired temporal knowledge. A pretest was used to assess 4 1/2- and 6-year-old children's ability to understand the temporal parameters of a fixed-interval schedule of reinforcement. The results as a whole show that the control exerted by instructions given by the experimenter or elaborated by the subjects themselves on fixed-interval performance of young children depends on the interaction of two factors: development of verbal self-control skills and mastery of knowledge required by the rules forming the instructions. 相似文献