全文获取类型
收费全文 | 11098篇 |
免费 | 524篇 |
国内免费 | 3篇 |
出版年
2020年 | 145篇 |
2019年 | 152篇 |
2018年 | 262篇 |
2017年 | 237篇 |
2016年 | 244篇 |
2015年 | 178篇 |
2014年 | 204篇 |
2013年 | 820篇 |
2012年 | 337篇 |
2011年 | 372篇 |
2010年 | 225篇 |
2009年 | 189篇 |
2008年 | 293篇 |
2007年 | 287篇 |
2006年 | 262篇 |
2005年 | 216篇 |
2004年 | 208篇 |
2003年 | 184篇 |
2002年 | 194篇 |
2001年 | 415篇 |
2000年 | 389篇 |
1999年 | 267篇 |
1998年 | 111篇 |
1996年 | 95篇 |
1995年 | 93篇 |
1992年 | 211篇 |
1991年 | 221篇 |
1990年 | 206篇 |
1989年 | 203篇 |
1988年 | 206篇 |
1987年 | 187篇 |
1986年 | 173篇 |
1985年 | 174篇 |
1984年 | 161篇 |
1983年 | 115篇 |
1982年 | 116篇 |
1979年 | 151篇 |
1978年 | 98篇 |
1977年 | 95篇 |
1976年 | 95篇 |
1975年 | 139篇 |
1974年 | 159篇 |
1973年 | 184篇 |
1972年 | 155篇 |
1971年 | 143篇 |
1970年 | 125篇 |
1969年 | 133篇 |
1968年 | 177篇 |
1967年 | 132篇 |
1966年 | 141篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
891.
Thill AD Holmbeck GN Bryant FB Nelson C Skocic A Uli N 《Journal of personality assessment》2003,81(2):111-122
The purpose of this study was to determine whether the structure of children's self-concept, as rated by children themselves on the Self-Perception Profile for Children (SPPC; Harter, 1985), and the structure of children's competence, as rated by their parents on the Rating Scale of Child's Actual Behavior (PRS) and teachers on the Rating Scale of Child's Actual Behavior (TRS; Harter, 1985), are similar across samples of children with and without spina bifida (children were 8 and 9 years of age; n = 68 in each sample). Using confirmatory factor analyses, results revealed that a multidimensional model for the SPPC and the TRS fit the data well for both samples. On the other hand, the model for both mothers' and fathers' PRS ratings did not fit the data for the spina bifida sample. Further tests of factorial invariance conducted on the SPPC and TRS revealed that the spina bifida and able-bodied samples tended to have the same pattern and magnitude of factor loadings for both instruments. There was some invariance, however, in the amount of unique error variance accounted for across samples. These results bolster our confidence in using the SPPC and TRS to compare children with and without spina bifida. 相似文献
892.
In a speeded choice reaction time task, responses to centrally presented letter targets can be altered by the identity of surrounding task-irrelevant letters (flankers). In the standard flanker effect, flankers associated with the same response as the target lead to faster and more accurate responses, whereas flankers associated with a different response lead to slower and more error-prone responses. B. A. Eriksen and C. W. Eriksen (1974, pp. 143-149) have argued that these flanker effects occur through response competition. We present data from a novel version of the Eriksen task, in which some targets and flankers consist of letter forms that are morphed versions of target letters. In this paradigm, flankers induce classic flanker effects on well-formed targets. But flankers induce an opposite effect, termed a negative flanker effect on morphed letter targets. For example, targets that are morphs between the letters "A" and "H" are more likely to be identified as an "A" when flanked by an "H." The interpretation advanced here is that there are two distinct kinds of flanker effects contrast enhancement in perceptual processes and response competition in response selection processes. 相似文献
893.
894.
Let each of several (generally interdependent) random vectors, taken separately, be influenced by a particular set of external factors. Under what kind of the joint dependence of these vectors on the union of these factor sets can one say that each vector is selectively influenced by “its own” factor set? The answer proposed and elaborated in this paper is: One can say this if and only if one can find a factor-independent random vector given whose value the vectors in question are conditionally independent, with their conditional distributions selectively influenced by the corresponding factor sets. Equivalently, the random vectors should be representable as deterministic functions of “their” factor sets and of some mutually independent and factor-independent random variables, some of which may be shared by several of the functions. 相似文献
895.
Children's working-memory processes: a response-timing analysis 总被引:3,自引:0,他引:3
Cowan N Towse JN Hamilton Z Saults JS Elliott EM Lacey JF Moreno MV Hitch GJ 《Journal of experimental psychology. General》2003,132(1):113-132
Recall response durations were used to clarify processing in working-memory tasks. Experiment 1 examined children's performance in reading span, a task in which sentences were processed and the final word of each sentence was retained for subsequent recall. Experiment 2 examined the development of listening-, counting-, and digit-span task performance. Responses were much longer in the reading-and listening-span tasks than in the other span tasks, suggesting that participants in sentence-based span tasks take time to retrieve the semantic or linguistic structure as cues to recall of the sentence-final words. Response durations in working-memory tasks helped to predict academic skill and achievement, largely separate from the contributions of the memory spans themselves. Response durations thus are important in the interpretation of span task performance. 相似文献
896.
Although at the time of this article's publication, many anecdotes and cross-sectional studies had reported that law students experience significant distress during their 1st year, few researchers had controlled for prelaw school status (e.g., M. Garrison, B. Tomko, & I. Yip, 1996; L. Guinier, M. Fine, J. Balin, A. Bartow, & D. L. Stachel, 1994), and only a single group of researchers had explored a psychosocial factor that predicted these changes. The present authors tested 3 sets of potential predictors of adjustment: sources of stress, coping strategies, and relationship factors. The present data replicated declines in students' psychological health, physical health, and attitudes toward law over the 1st year of school. That result supports the generalizability and currency of previous studies. In contrast to other researchers, the present authors found few gender differences. Less relationship happiness, less emotional support, and use of less active coping tactics at the beginning of the year predicted poorer outcomes at the end of the year. Strain from academic pressures, lack of personal time, and social isolation were correlated with poorer outcomes. 相似文献
897.
Women perform better than men on tests of verbal memory, but the nature of this advantage has not been precisely established. To examine whether phonemic memory is a factor in the female advantage, we presented, along with other verbal memory tasks, one containing nonsense words. Overall, there was the expected female advantage. However, an examination of the individual tests showed female superiority in recall of the real words but not the nonsense words. 相似文献
898.
The aim of this study was to reveal gender portrayal types in Japanese television advertisements through content analysis. Five hundred and thirty-one adult main characters were coded for sex, age, ethnic background, credibility, role, place, dress, background, persuasion type, camera work, camera angle, product type, target, and sex of voice-over. Five types were found by performing quick cluster analysis: beautiful and wise housewives, young ladies attracting people's attention, young celebrities, middle- and old-aged people enjoying private time, and middle-aged worker bee. The first three were mainly women and the latter two were mainly men. The results indicate that in Japanese television advertisements men and women are portrayed differently, and the differences correspond with traditional gender stereotypes. 相似文献
899.
Concordance between patients' and informants' reports of personality disorders (PDs) is low, raising the questions of which source provides more valid data and whether both contribute unique information. This study compared patients' and informants' reports of PDs in predicting outcome in a 7 1/2-year follow-up of 85 depressed outpatients. Patients and informants were independently evaluated using structured interviews; outcome was assessed using structured interviews with patients. Both patients' and informants' reports of PD diagnoses and dimensional scores independently predicted depression symptoms and global functioning at follow-up. However, only informants' reports made a unique contribution to predicting social adjustment. This finding indicates that both patients and informants provide unique information on Axis II psychopathology and argues for the use of both sources in the assessment of PDs. 相似文献
900.
Results from studies on incremental validity are described for (a) interviews, (b) personality inventories, (c) projective techniques, and (d) brief self-rated and clinician-rated measures. In some of the studies (clinical judgment studies), psychologists were given increasing amounts of information. In other studies (statistical prediction studies), increasing amounts of assessment information were entered into a statistical prediction rule. Although relatively little research has been conducted on incremental validity, results that have been obtained tend to favor the use of interviews, personality inventories (e.g., the Minnesota Multiphasic Personality Inventory--2; J. N. Butcher, W. G. Dahlstrom, J. R., Graham, A. Tellegen, & B. Kaemmer, 1989), and brief self-rated measures (e.g., the Anxiety Sensitivity Index, S. Reiss, R. A. Peterson, D. M. Gursky, & R. M. McNally, 1986). Results are generally less encouraging for projective techniques. 相似文献