全文获取类型
收费全文 | 26470篇 |
免费 | 391篇 |
国内免费 | 2篇 |
出版年
2021年 | 57篇 |
2020年 | 113篇 |
2019年 | 132篇 |
2018年 | 3608篇 |
2017年 | 2992篇 |
2016年 | 2428篇 |
2015年 | 344篇 |
2014年 | 257篇 |
2013年 | 804篇 |
2012年 | 843篇 |
2011年 | 2651篇 |
2010年 | 2669篇 |
2009年 | 1648篇 |
2008年 | 1924篇 |
2007年 | 2392篇 |
2006年 | 256篇 |
2005年 | 442篇 |
2004年 | 388篇 |
2003年 | 313篇 |
2002年 | 274篇 |
2001年 | 138篇 |
2000年 | 170篇 |
1999年 | 124篇 |
1998年 | 118篇 |
1997年 | 103篇 |
1996年 | 103篇 |
1995年 | 88篇 |
1994年 | 79篇 |
1993年 | 66篇 |
1992年 | 85篇 |
1991年 | 64篇 |
1990年 | 64篇 |
1989年 | 53篇 |
1988年 | 54篇 |
1987年 | 44篇 |
1986年 | 48篇 |
1985年 | 64篇 |
1984年 | 60篇 |
1983年 | 52篇 |
1982年 | 73篇 |
1981年 | 71篇 |
1980年 | 53篇 |
1979年 | 54篇 |
1978年 | 44篇 |
1977年 | 66篇 |
1976年 | 44篇 |
1975年 | 50篇 |
1974年 | 39篇 |
1973年 | 46篇 |
1972年 | 35篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
231.
Pairs of cartoon episodes which did and did not meet the National Association of Broadcaster's Code for Violence were rated by college students and children on a series of scales to evaluate level of violence and of enjoyment. The results indicated that the Code has been ineffective in reducing levels of rated violence; however, entertainment value has decreased. 相似文献
232.
John S. Watson Louise A. Hayes Peter Vietze 《Journal of applied developmental psychology》1982,3(3):191-203
An 8-month-old infant with a developmental quotient of months was given response-contingent stimulation using a pressure-sensitive pillow which turned an overhead mobile. The subject learned to control the mobile by kicking the pillow, and concurrently began smiling at both the mobile and her mother for the first time. After mastering three contingencies on arm, head, and leg movement, she displayed what appeared to be a Piagetian coordinated secondary circular reaction, in which one response provided 4 seconds of access to another contingency. Although the subject remains severely retarded, the results suggest that some forms of developmental delay may be treated at least in part as a failure to develop contingency awareness. 相似文献
233.
The behavioural treatment of auditory hallucinations in three chronic schizophrenic patients is reported. Two treatment conditions, one in which white noise followed hallucinations and a second in which white noise was presented during reported hallucinations, were contrasted in a crossover design with a control condition where white noise was presented randomly. All three patients improved, although reported reductions in hallucinations were more marked in two cases than in the third. Some generalization of treatment effects was observed in all three patients. White noise presented concurrently with hallucinatory reports appeared to be the most effective. The implication of these findings for a theory of auditory hallucinations is discussed. 相似文献
234.
Peter C Fishburn 《Journal of mathematical psychology》1982,25(3):226-242
This paper presents the second part of a two-part study on axiomatizations of perceived risk. The first part (P. C. Fishburn, Foundations of risk measurement, I. Risk as probable loss. Mimeo., Bell Laboratories, 1981) focussed on risk as probable loss. The second part considers measures of risk that include effects of gains on perceived risk. It adopts the position that increased gains can reduce the risk of fixed probable losses without completely negating this risk. Moreover, every prospect that has no chance of yielding a loss is presumed to have no risk. Several numerical measures of risk are axiomatized. The more specialized are separable in gains and losses. Further specializations isolate the effects of loss and gain probabilities. 相似文献
235.
236.
MacRae and Loh (1981) reported that when observers attempt to match angles, whether simultaneously or successively, and regardless of whether the angles have the same orientation or not, acute angles generally are set too large and obtuse angles, too small. Without presenting data, they argued indirectly that starting-position effects in their adjustment procedure could not have accounted for the errors. In four experiments, we have demonstrated that effects similar to MacRae and Loh’s do occur when their starting positions are used and that no such effects occur when psychophysical methods that minimize or eradicate starting position effects are used. 相似文献
237.
Peter Mosenthal 《Journal of experimental child psychology》1979,28(2):323-343
This paper attempted to examine how children, when confronted with a literary implicature, resolve this implicature under two types of social conditions. More specifically, this paper identified five types of strategies which people employ to resolve text anomalies arising when old information in a story setting is incompatible with new information in a story ending. Two experiments demonstrated that third graders (8.4 and 8.6 years) and sixth graders (12.5 and 12.8 years) consistently selected certain strategies for resolving old and new, empirical and value, contradictory information. Although third and sixth graders demonstrated a similar strategy preference for resolving contradictory old and new information in formal conditions, the principal difference was that third graders modified old information to fit new information while sixth graders modified new information to fit old information. In contrasting the formal and informal conditions, third graders shifted their strategy preferences so as to minimize the amount of text restructuring in the formal condition; sixth graders, on the other hand, shifted their strategy preferences so as to maximize the amount of text restructuring in informal conditions. These findings suggest that story schema structures are more interpretive than story grammar psychologists presently assume. 相似文献
238.
Two issues related to Hogan's Survey of Ethical Attitudes (SEA) were investigated. First, the adequacy of Hogan's theoretical characterizations of the two poles of the SEA was tested. The results supported his characterization of the ethics of conscience, but only partially supported his characterization of the ethics of responsibility. Our second focus was on Hogan's prediction that “moral maturity” should be curvilinearly related to the SEA. As predicted, when moral maturity was measured in Hogan's sense, subjects scoring in the middle of the SEA dimension showed higher levels of moral maturity than those at either the ethics of conscience end or the ethics of responsibility end. In contrast, moral maturity in Kohlberg's sense was linearly related to the SEA with the most mature individuals scoring at the ethics of conscience end of the dimension. The total pattern of results highlights the importance of conceptual clarity and conceptual pluralism in research on morality. 相似文献
239.
Three properties of the cusp catastrophe: bimodality, inaccessibility, and hysteresis were evaluated in rabbit eyelid conditioning. Bimodality was evidenced by the fact that responding tended to occur at either very low or very high levels, and inaccessibility by the fact that intermediate levels of responding were rarely encountered. Hysteresis was demonstrated when: (a) levels of responding attained under a continuous schedule of reinforcement were largely maintained by a schedule which was too lean to promote conditioning by itself; and (b) levels of responding attained with a high intensity unconditional stimulus were largely maintained by a lower intensity unconditional stimulus which was too weak to promote conditioning in its own right. These results are consistent with the model of conditioning suggested by P. W. Frey and R. J. Sears (Psychological Review, 1978, 85, 321–340) which postulates response-mapping rules based on the cusp catastrophe. 相似文献
240.
John E. Bates Peter M. Bentler Spencer K. Thompson 《Journal of abnormal child psychology》1979,7(3):243-259
The physical movement and social characteristics of effeminate behavior-problem, referred boys (N=13)were compared with those of normal boys (N=25)and boys (N=12)referred for nongender problems. Parent reports, observer ratings, and videotapes were collected in a series of structured tasks. As expected, mothers described gender-problem sons as much more feminine than the other two groups in interests, activities, and mannerisms. Gender-problem sons were also seen as relatively inactive and introverted. Further, they were non-significantly lower than the clinical control boys in perceived behavior problems, but both groups had marginally more problems than the normal boys. Gender-problem and clinical control boys both showed more body constriction than normal boys in ratings of a videotaped interview. They also both showed less ideal ball-throw form than normal boys on a set of variables scored with slow-motion video. However, in a set of behaviors directly rated in the various tasks, the gender-problem boys gave a uniquely general impression of uncoordination. The groups did not differ on seven additional variables.The research was supported in part by USPHS Grant MH17072. The authors are indebted to the more than two dozen research staff members who contributed many essential services at various stages of the project, to the families who generously participated, to the clinicians who referred their clients to our project, and to Marion Hee for computational assistance. 相似文献