全文获取类型
收费全文 | 51132篇 |
免费 | 2089篇 |
国内免费 | 27篇 |
出版年
2020年 | 555篇 |
2019年 | 655篇 |
2018年 | 898篇 |
2017年 | 889篇 |
2016年 | 977篇 |
2015年 | 715篇 |
2014年 | 857篇 |
2013年 | 3996篇 |
2012年 | 1622篇 |
2011年 | 1637篇 |
2010年 | 1019篇 |
2009年 | 1021篇 |
2008年 | 1453篇 |
2007年 | 1444篇 |
2006年 | 1325篇 |
2005年 | 1255篇 |
2004年 | 1164篇 |
2003年 | 1118篇 |
2002年 | 1114篇 |
2001年 | 1490篇 |
2000年 | 1423篇 |
1999年 | 1090篇 |
1998年 | 574篇 |
1997年 | 538篇 |
1996年 | 511篇 |
1992年 | 987篇 |
1991年 | 935篇 |
1990年 | 941篇 |
1989年 | 824篇 |
1988年 | 792篇 |
1987年 | 792篇 |
1986年 | 835篇 |
1985年 | 931篇 |
1984年 | 733篇 |
1983年 | 671篇 |
1981年 | 490篇 |
1979年 | 784篇 |
1978年 | 524篇 |
1977年 | 512篇 |
1976年 | 510篇 |
1975年 | 670篇 |
1974年 | 762篇 |
1973年 | 792篇 |
1972年 | 670篇 |
1971年 | 620篇 |
1970年 | 600篇 |
1969年 | 597篇 |
1968年 | 775篇 |
1967年 | 688篇 |
1966年 | 617篇 |
排序方式: 共有10000条查询结果,搜索用时 171 毫秒
981.
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
982.
We investigated the programming of generalization and maintenance of correspondence between verbal and nonverbal behavior in a preschool setting. Four children participated in a series of multiple-baseline designs. In Experiment 1, delayed reinforcement of verbal behavior effectively controlled maintenance of correspondence with previously trained responses and also resulted in generalization of correspondence to one untrained response. As the latter effect was limited, Experiment 2 was a further assessment of the effects of delayed reinforcement of generalization of correspondence to untrained responses, and consistent generalization was shown. Experiment 2 also showed that generalization, if lost, could be recovered through use of "booster training," in which the original contingencies were reinstated for a brief period. Experiment 3 provided replications, with two additional children, of the effects of delayed reinforcement on maintenance of correspondence. Results are discussed in terms of using delayed reinforcement as an indiscriminable contingency. 相似文献
983.
984.
Lana M. Mahon Norma Neufeld Mani M. Mani Edward R. Christophersen 《Journal of applied behavior analysis》1984,17(3):391-396
The effect of informational feedback on the protein and caloric consumption of burn patients was investigated using a multiple-baseline across subjects. The patients were four severely burned adult males who failed to consume sufficient foods to achieve prescribed levels of protein or kilocalories via standard burn unit procedures during recovery. Feedback consisted of informing patients of (a) their prescribed levels of protein and kilocalories, (b) the protein and kilocalorie content of hospital foods and beverages, and (c) their actual intake of protein and kilocalories. Following the provision of feedback, there was an increase in protein and kilocalorie intakes and in the number of days during which prescribed levels for protein and kilocalories were achieved. These results suggest that the informational feedback was effective for improving the oral caloric intake of burn patients. 相似文献
985.
Bennett I. Bertenthal Dennis R. Proffitt James E. Cutting 《Journal of experimental child psychology》1984,37(2):213-230
Two experiments assessed infant sensitivity to figural coherence in point-light displays moving as if attached to the major joints of a walking person. Experiment 1 tested whether 3- and 5-month-old infants could discriminate between upright and inverted versions of the walker in both moving and static displays. Using an infant-control habituation paradigm, it was found that both ages discriminated the moving but not the static displays. Experiment 2 was designed to clarify whether or not structural invariants were extracted from these displays. The results revealed that (1) moving point-light displays with equivalent motions but different topographic relations were discriminated while (2) static versions were not, and (3) arrays that varied in the amount of motion present in different portions of the display were also not discriminated. These results are interpreted as indicating that young infants are sensitive to figural coherence in displays of biomechanical motion. 相似文献
986.
Correlations were computed between United States per capita consumption of cigarettes and 41 different foods for the years 1964–1977 and 1968–1973. There were significant negative correlations between consumption of cigarettes and sugar. Few other foods showed any relationship to cigarette consumption. These findings corroborate the results of a recent human laboratory study of cigarette smoking and food consumption and a recent animal study of the effects of nicotine on food consumption, taste preferences, and body weight. Taken together, these studies suggest that the inverse relationship between cigarette smoking and body weight may be partially explained by changes in consumption of sweet-tasting high caloric foods. 相似文献
987.
The relative effectiveness of incentive and minimal justification techniques in promoting electrical energy conservation among 90 homeowners was investigated. Subjects in the Questionnaire condition were asked to complete a short energy conservation survey. Those in the Commitment condition were asked to curtail their consumption of electricity by 15%. In the Questionnaire + Commitment condition, subjects received both requests. These three groups were compared to an Incentive condition, where individuals were offered a highly attractive monetary incentive for conserving electricity, a Questionnaire + Commitment + Incentive condition, and a Control condition. The groups did not differ in electricity consumption during baseline, initial request, or follow-up periods. However, during the conservation period, homeowners in the Commitment and the combined treatment groups conserved more electricity and contained more conservers than either of the remaining groups. These outcomes were discussed in terms of the comparative effectiveness of minimal justification and incentive strategies for inducing behavioral change. 相似文献
988.
This study investigated the effect of television-mediated aggression and real-life aggression on the behavior of Lebanese children. The sample consisted of 48 boys and 48 girls of Lebanese origin who were students in an elementary school in Beirut, Lebanon. After controlling for pre-experimental aggression, the subjects were randomly assigned to one of the following treatment conditions: human-film aggression, cartoon-film aggression, neutral film, or real-life (act of war) aggression. The results indicated that boys as a group were more aggressive than girls and exhibited more imitative aggression after viewing both violent film and real-life violence. Girls were not more violent after viewing filmed aggression but were affected by the real-life violence. Comparisons of Bandura's work within the Lebanese culture are made. 相似文献
989.
Nursery schoolers and first- and third-graders participated in an interview which assessed recall, comprehension, and perceived importance of three sources of self-knowledge: social feedback, self-observation, and social comparison. For recall measures, these sources were embedded in stories about a child making a self-discovery. Recall of all three sources improved with grade level, and feedback was the best remembered self-validational process. Comprehension was defined as the ability to identify the sources as depicted in line drawings, and it, too, increased with grade level. All three sources were well understood by older children, but preschoolers had difficulty with the concept of social comparison. Ratings of importance, also assessed using line drawings, were independent of grade level. When selecting their own “very best” source of self-knowledge, children cited self-observation most frequently. A supplementary sample of preschoolers nominated the best source of self-knowledge for other children rather than for themselves; under these instructions, feedback from others emerged as the preferred source. 相似文献
990.
Figure drawings obtained from 758 white male medical students were scored using three different methods. Method I involved 16 different physical size measurements; Method II involved six separate sophistication of body concept ratings; and Method III involved 42 separate aspects of the drawings weighted in direct proportion to their relative frequency of occurrence in the sample studied (conventionality scoring). Separate factor analyses of the scores derived from each method revealed that Methods I and II each reflect only a single underlying factor, and that these factors are uncorrelated in the population studied. Method III yielded eight meaningful factors, each of which may be construed as an independent area of conventionality/deviancy. An overall conventionality/deviancy score was also derived. It is believed that these three methods of scoring capture most of the variance inherent in existing figure drawing scoring systems, but that use of all three is necessary for a comprehensive analysis. 相似文献