全文获取类型
收费全文 | 86266篇 |
免费 | 2652篇 |
国内免费 | 20篇 |
出版年
2019年 | 849篇 |
2018年 | 4270篇 |
2017年 | 3623篇 |
2016年 | 3294篇 |
2015年 | 1078篇 |
2014年 | 1147篇 |
2013年 | 5324篇 |
2012年 | 2501篇 |
2011年 | 4319篇 |
2010年 | 3634篇 |
2009年 | 2706篇 |
2008年 | 3477篇 |
2007年 | 3901篇 |
2006年 | 1867篇 |
2005年 | 1835篇 |
2004年 | 1678篇 |
2003年 | 1563篇 |
2002年 | 1614篇 |
2001年 | 2118篇 |
2000年 | 2131篇 |
1999年 | 1606篇 |
1998年 | 849篇 |
1997年 | 751篇 |
1996年 | 751篇 |
1995年 | 664篇 |
1993年 | 655篇 |
1992年 | 1351篇 |
1991年 | 1248篇 |
1990年 | 1221篇 |
1989年 | 1123篇 |
1988年 | 1104篇 |
1987年 | 1070篇 |
1986年 | 1151篇 |
1985年 | 1153篇 |
1984年 | 996篇 |
1983年 | 930篇 |
1982年 | 705篇 |
1981年 | 696篇 |
1979年 | 1033篇 |
1978年 | 794篇 |
1975年 | 887篇 |
1974年 | 942篇 |
1973年 | 1024篇 |
1972年 | 861篇 |
1971年 | 788篇 |
1970年 | 700篇 |
1969年 | 729篇 |
1968年 | 923篇 |
1967年 | 815篇 |
1966年 | 702篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
321.
Fragile X speech phonology in Finnish 总被引:1,自引:0,他引:1
Fragile X syndrome is a recently discovered relatively common syndrome linked with an anomaly of the X chromosome and causing handicaps of cognitive development especially in males. In the present phonological analysis we will discuss the sound patterns of two Finnish fragile X speakers, a five (borderline intelligence)- and an eight (mildly mentally retarded)-year-old boy. The fragile X syndrome is not necessarily linked with any anomalies of speech organs. The subjects could produce all Finnish speech sounds in isolated test words. However, in the present samples of connected speech they exhibited general dysphonology. What is noteworthy is that their phonological error patterns resembled each other to a great extent. Among the common features were the tendencies to substitute and omit phonemes. As for vowels, our results showed about one-half of the errors to be omissions. Labiality and quantity oppositions were quite resistant to substitution. Most substitution errors of place of consonants occurred in dentals. As for the feature of manner, /r/ and /s/ were the phonemes most prone for substitution. A tendency toward spirantization or /h/ sation was common for both patients. The number of additions was clearly lower than has been reported for English-speaking developmentally dyspraxic children and also for Finnish Broca's aphasics. The speech problems of our patients seemed to indicate higher level motor encoding problems of linguistic information rather than peripheral articulatory deficits. 相似文献
322.
S J Behrens 《Brain and language》1988,33(1):104-127
Recent research has proposed a general prosodic disturbance associated with right hemisphere damage (RHD), one encompassing both affective and linguistic functions. The present study attempted to explore whether the ability to produce linguistic prosody was impaired in this patient population. Productions of phonemic stress tokens (e.g., Re'dcoat vs. red coa't) as well as examples of contrastive stress, or sentential emphasis (e.g., Sam hated the movie), were elicited from eight male speakers with unilateral right hemisphere CVAs and seven male control subjects. Two types of analyses were conducted on these utterances. Acoustic analysis focused on the correlates associated with word stress, namely changes in amplitude, duration, and fundamental frequency. The perceptual saliency of emerging cues to stress was also examined by presentation of test tokens to phonetically trained listeners for identification of stress placement. The patients as a group produced fewer acoustic cues to stress compared to the normal subjects, but no statistical differences were found between groups for either stress at the phrase level or at the sentence level. In the perceptual analysis, stress produced by the patient group was judged to be less salient than that for the normal group, although a high degree of variability was evident in both populations. The data suggest a spared processing mechanism for linguistic prosody in RHD speakers, thus mitigating against the view of a general dysprosody tied to RHD. 相似文献
323.
J M McDowd F I Craik 《Journal of experimental psychology. Human perception and performance》1988,14(2):267-280
We report two experiments that compare the performance of young and older adults on perceptual-motor tasks involving division of attention. Previous studies have shown older people to be especially penalized by divided attention situations, but the generality of this finding was recently challenged by Somberg and Salthouse (1982). The present study was conducted to investigate the possibility that age differences in dual-task performance are amplified by an increase in the difficulty of the constituent tasks, where difficulty was manipulated by varying the central, cognitive nature of the tasks (Experiment 1) or the degree of choice involved (Experiment 2). With the present tasks, strong evidence was found for an age-related decrement in divided attention performance. Contrary to our original expectations, however, it does not seem that division of attention presents some especial difficulty to older people. Rather, division of attention is one of several equivalent ways to increase overall task complexity. In turn, age differences are exaggerated as tasks are made more complex. 相似文献
324.
The influence of affect on causal attributions for success and failure was examined in this experiment. A positive, neurtral, or negative mood was induced in subjects who then learned they had either succeeded or failed an aptitude test taken previously. Relative to neutral mood control conditions, subjects in both positive and negative mood conditions showed a pronounced self-serving bias, particularly following success. The finding is interpreted as self-regulation of affective state. Specifically, causal attribution of success to internal factors can sustain or enhance positive affect; attribution of failure to external factors can diminish negative affect. Ancillary analyses corroborated this interpretation. 相似文献
325.
Interactions between area and numerosity 总被引:2,自引:0,他引:2
Piet G. Vos Michiel P. van Oeffelen Hein J. Tibosch Jüri Allik 《Psychological research》1988,50(3):148-154
Summary The concept of filled area, i.e. the impressionistic ensemble of parts of a stimulus field occupied by dots, is used to account for various kinds of numerosity illusions due to perceptual interaction between a number of dots and their spatial arrangement. A measure of filled area is derived from a model for the perceptual clustering of dots on the basis of relative proximity. It is shown that the quantified concept of filled area successfully predicts illusion data from earlier studies. Subsequently, a two-alternatives forced-choice numerosity experiment is reported, the data of which gave further evidence of the predictive power of the filled-area hypothesis. Our approach is discussed with respect to spatial features of dot stimuli that might be in rivalry with the filled-area factor in numerosity-estimation tasks. 相似文献
326.
Summary The interactive-activation model postulates (a) that activation at the letter level leads automatically to activation at the word level, (b) that the word-superiority effect reflects reactivation of letters by the word they spell, and (c) that subjects identify words on the basis of information obtained from separate letter-position channels. In the first two experiments, we showed words in upper, lower, or mixed case: the word-superiority effect was reduced when words were presented in mixed-case letters, presumably because extra-letter information is lost with mixed-case presentation; i.e., postulate (c) is wrong. The third experiment showed that when the letters of a word are rotated 180° subjects can identify the letters without producing a word-superiority effect; i.e., one of postulates (a) and (b) is wrong. In Experiments 4 and 5, we trained subjects to name words presented in inverted letters; training was more effective when subjects could exploit bigram information in addition to letter-channel information; i.e., reading inverted text is based on extra-letter-feature information, not on a general skill in rotating letters. Taken together, our data deny three of the interactive-activation model's major postulates. We offer some suggestions for future versions of the model.
Electronic mail: Userid: MEWHORTD; Nodeid: QUCDN; Domain: BITNET 相似文献
327.
The purpose of the present study was to determine whether the sex role orientations of male and female collegiate athletes were more similar in team sports than in individual sports. It was predicted that females in masculine-oriented team sports (basketball and volleyball) would exhibit sex role orientations more similar to those of their male counterparts than would females in individual sports (track/field and swimming). To test this notion the S. L. Bem (The Measurement of Psychological Androgyny, Journal of Consulting and Clinical Psychology, 1974, 42, 155–167) Sex Role Inventory was administered to 381 athletes from 37 National Collegiate Athletic Association institutions. The median-split procedure (S. L. Bem, On the Utility of Alternative Procedures for Assessing Psychology Androgyny, Journal of Consulting and Clinical Psychology, 1977, 45, 196–205) was used to classify subjects as masculine, feminine, androgynous, or undifferentiated. Separate Gender × Sex Role Orientation chi square tests were performed on the frequency data of team and individual sport athletes. The results indicated no significant differences in the sex role orientations of male and female team sport performers, with the greatest proportion (66%) having a masculine (33%) or androgynous (33%) orientation. For individual sports there was a significant difference in the sex role orientations of males and females. The highest proportion of females were classified as feminine (37%) and the lowest proportion were classified as masculine (11%). Individual sport males were somewhat evenly distributed among the four sex role orientation categories, with the highest proportion classified as undifferentiated (36%). It was concluded that sex role orientation of elite female athletes may be associated with the male appropriateness of the sport in which they participate. 相似文献
328.
329.
Lemkau JP 《Psychology of women quarterly》1988,12(4):461-472
For women in therapy who have had abortions, an exploration of the context and aftermath of each abortion has been suggested. This inquiry should include: characteristics of the woman herself before and at the time of the abortion, the nature of the interpersonal and cultural milieu at the time, characteristics of the medical environment and procedure, and any events subsequent to the abortion that may evoke regrets about the earlier decision.
Whether or not such an inquiry results in the identification of unresolved issues surrounding the abortion, it is likely to enhance one's general understanding of the client. Exploring a woman's decision to have an abortion can bring into relief developmental and family issues, relationship conflicts, and her aspirations for education, work, and family. A woman's approach to establishing and asserting her priorities and values in making difficult personal decisions becomes clear as does her ability to tolerate and resolve the ambivalence inherent in making difficult decisions.
In psychotherapy, it is important to understand and address those aspects of experience that women have difficulty resolving. Hence, the emphasis on categories of experience that may have a negative impact on a woman's emotional well-being after abortion. Nevertheless, the clinician should remember that even women who report negative post-abortion sequelae overwhelmingly report that they feel that the decision was the right one for them. Having ambivalent feelings to resolve does not necessarily mean that one has made a wrong choice, only that one has made an emotionally significant choice with far-reaching personal implications, in a sociocultural environment that reinforces the ambivalence inherent in such decisions. 相似文献
Whether or not such an inquiry results in the identification of unresolved issues surrounding the abortion, it is likely to enhance one's general understanding of the client. Exploring a woman's decision to have an abortion can bring into relief developmental and family issues, relationship conflicts, and her aspirations for education, work, and family. A woman's approach to establishing and asserting her priorities and values in making difficult personal decisions becomes clear as does her ability to tolerate and resolve the ambivalence inherent in making difficult decisions.
In psychotherapy, it is important to understand and address those aspects of experience that women have difficulty resolving. Hence, the emphasis on categories of experience that may have a negative impact on a woman's emotional well-being after abortion. Nevertheless, the clinician should remember that even women who report negative post-abortion sequelae overwhelmingly report that they feel that the decision was the right one for them. Having ambivalent feelings to resolve does not necessarily mean that one has made a wrong choice, only that one has made an emotionally significant choice with far-reaching personal implications, in a sociocultural environment that reinforces the ambivalence inherent in such decisions. 相似文献
330.
James B. Wade Ph.D. Robert P. Hart Ph.D. Donald F. Kirby M.D. Peter R. Mills M.D. 《Group》1988,12(3):172-178
This study evaluated the efficacy of the Garren-Edwards Behavior Modification Program, which uses the Garren-Edwards Gastric Bubble as an adjunct to treatment. Group therapy sessions were conducted with 23 morbidly obese subjects for 6 months on a biweekly basis. Each therapy session used a five-stage problem-solving sequence designed to facilitate adaptive behavioral alternatives. In evaluating weight change, a multivariate analysis of variance was conducted along with two preplanned orthogonal comparisons. Patients lost significant amounts of weight between initial to 3-month (p<.0001) and 3- to 6-month intervals (p<0001). A similar treatment effect was noted in an additional sample of 24 morbidly obese subjects following 3 months of treatment (p<0005). The findings support the value of longer goal-oriented programs in promoting continued weight loss. Implications for treatment process and therapist interventions prompted by this new format are discussed. 相似文献