全文获取类型
收费全文 | 7966篇 |
免费 | 299篇 |
国内免费 | 2篇 |
专业分类
8267篇 |
出版年
2021年 | 61篇 |
2020年 | 121篇 |
2019年 | 136篇 |
2018年 | 166篇 |
2017年 | 193篇 |
2016年 | 187篇 |
2015年 | 164篇 |
2014年 | 191篇 |
2013年 | 954篇 |
2012年 | 321篇 |
2011年 | 329篇 |
2010年 | 191篇 |
2009年 | 231篇 |
2008年 | 330篇 |
2007年 | 313篇 |
2006年 | 297篇 |
2005年 | 296篇 |
2004年 | 272篇 |
2003年 | 248篇 |
2002年 | 258篇 |
2001年 | 116篇 |
2000年 | 105篇 |
1999年 | 129篇 |
1998年 | 139篇 |
1997年 | 101篇 |
1996年 | 94篇 |
1995年 | 112篇 |
1994年 | 94篇 |
1993年 | 84篇 |
1992年 | 84篇 |
1991年 | 90篇 |
1990年 | 67篇 |
1989年 | 77篇 |
1988年 | 68篇 |
1987年 | 60篇 |
1986年 | 70篇 |
1985年 | 85篇 |
1984年 | 87篇 |
1983年 | 78篇 |
1982年 | 74篇 |
1981年 | 73篇 |
1980年 | 72篇 |
1979年 | 56篇 |
1978年 | 70篇 |
1977年 | 68篇 |
1976年 | 73篇 |
1975年 | 65篇 |
1974年 | 61篇 |
1973年 | 49篇 |
1972年 | 42篇 |
排序方式: 共有8267条查询结果,搜索用时 6 毫秒
241.
Women are often said to exhibit an externality bias in their performance attributions. To test this hypothesis, male and female college students made effort, ability, luck, and task difficulty attributions for their performance on a recent course examination. Measures of the students' affective reactions toward their performance were also obtained. Successful students, whether male or female, made internal attributions and were pleased with their performance. Stronger internal attributions were associated with more positive affective reactions for these students. Unsuccessful female students made external attributions, were displeased with their performance, and felt better when they attributed their failure to unstable factors. Unsuccessful male students were also displeased with their performance, but tended to make more internal attributions for their failure, and felt better as a result. These findings, which suggest the influence of an internality bias among men, rather than an externality bias among women, were interpreted in terms of the male sex role. 相似文献
242.
The simultaneous effects of the sex-role appropriateness of the task and the presence or absence of competition upon the attributions made by males and females were studied with 192 college students. Contrary to predictions, males rated themselves as luckier than females in the competitive conditions. However, as predicted, females made fewer self-serving attributions for the male than the female task. 相似文献
243.
The hypothesis-testing behavior of kindergarten children in discrimination learning was studied in a factorial design with two temporal placements of introtact probes (pretrial and posttrial) and two types of pretraining (unidimensional and multidimensional). Pretrial probes consisting of a request for the child's current hypothesis were administered in a conventional manner at the beginning of each trial with the stimuli in view and prior to the choice response. Posttrial probes were administered also with the stimuli in view, but after the choice response had occurred and feedback information had been provided. Learning-to-learn experience in solving three pretraining problems was given either with unidimensional simultaneous problems or with more complex multidimensional problems like the criterion tasks. The results indicated that posttrial probes produced superior local consistency, win-stay, and lose-shift probabilities, relative to pretrial probes, for both types of pretraining. Posttrial probes, however, facilitated learning and the testing of valid hypotheses only for multidimensional pretraining. These results are consistent with the hypothesis that posttrial probes constrain the child to be locally consistent and therefore improve short-term efficiency in hypothesis testing under both pretraining conditions. However, posttrial probes produce an improvement in long-term efficiency, and therefore in learning, only when other components of a successful strategy are acquired as in multidimensional pretraining. 相似文献
244.
It was found that illiterate adults could neither delete nor add a phone at the beginning of a non-word; but these tasks were rather easily performed by people with similar environment and childhood experiences, who learned to read rudimentarily as adults. Awareness of speech as a sequence of phones is thus not attained spontaneously in the course of general cognitive growth, but demands some specific training, which, for most persons, is probably provided by learning to read in the alphabetic system. 相似文献
245.
This study examined the use of oral contraceptives in a sample of sexually active college women. The analytic approach employed was based on Fishbein's model for the prediction of behavior, which emphasizes perceived consequences and normative influences. It was found that each of these factors was significantly related to use of oral contraception, and that a stronger relationship was obtained when both components were combined. Results suggested that nonusers are more Likely to associate oral contraception with unhealthful consequences than are users, and that users believe employment of this method enhances their sexual satisfaction. It was also suggested that the opinions of these young women's partners and close friends, but not of their parents, are reflected in respondents' use of the pill. These results were compared with earlier findings on the correlates of intentions to use oral contraceptives, and applied implications were discussed. 相似文献
246.
David Marholin Paul E. Touchette R. Malcolm Stewart 《Journal of applied behavior analysis》1979,12(2):159-171
Approximately 50% of all institutionalized, mentally retarded adults receive psychotropic medication to control inappropriate behavior. In this study, behaviors exhibited by five retarded adults were formally observed while they were on and off medication. Each subject had been receiving chlorpromazine for six or more years prior to the start of the study. The drug was withdrawn and readministered using a double-blind B-A-B (drug-placebo-drug) design. Effects were highly individualized. Some desirable behavior emerged when chlorpromazine was discontinued. 相似文献
247.
In a previous experiment, the authors demonstrated that kindergarten and first-grade children can be trained to test hypotheses sequentially within the context of a discrimination learning task. The present experiment is concerned with delineating various aspects of the pretraining that contribute to the improved hypothesis-testing strategies of kindergarten children (mean CA = 71.6 months). It was found that children who have learned to anticipate an invariant cue-reward relation in such tasks manifest improved hypothesis-testing behavior, as well as improved discrimination performance, whereas children who have been trained to identify and name the various stimulus components of the discriminanda do not perform better than those without such training. It was also found that children who have had practice in shifting from an irrelevant to a relevant dimension perform better than those who have not had such experience. Moreover, children who have been given explicit instruction and training in the use of win-stay and lose-shift rules, as well as in the use of valid hypotheses, manifest strategies superior to those without such training. Finally, extensive pretraining over two sessions, administered on separate days, resulted in a marked reduction in the proportion of children who were dimensionally fixated while solving discrimination problems with two genuine dimensions. 相似文献
248.
This study investigated the relationship between manifest handedness and the localization of EEG abnormalities in a large group of mentally retarded persons. Persons who had abnormal EEG recordings, regardless of whether the dysfunction was bilateral or asymmetric, exhibited approximately twice the incidence of left-handedness than persons who had normal EEG's. Data for persons having asymmetric damage support a model of pathological left-handedness, with left-handers showing a substantially higher probability of having left brain dysfunction than right-handers. 相似文献
249.
The few past studies in this topic area have consistently found that human subjects, as a group, are able to judge veracity better than chance; but no findings have been published relating individual differences to judgmental accuracy. Thus the present study was designed as a first step in filling this knowledge gap. To create a stimulus set of lies and truths, which listeners would later judge for veracity, a method was employed that generated 10 audio-tape recorded lies and 10 audio-tape recorded truths. Each of 100 subject-listeners judged each audio-tape for veracity, and also provided information on a set of personological variables. Listener, as a group, were significantly better than chance in accurately judging veracity (p < .001). In addition, a set of personological variables (social intelligence, field dependence/independence, number of siblings, TV viewing habits, and confidence in judgments) was identified that accounted for 22% of the variance in accuracy (p < .0002). It is acknowledged that these findings are tentative and will require replication before they can be regarded as reliable or valid. 相似文献
250.