全文获取类型
收费全文 | 32061篇 |
免费 | 1385篇 |
国内免费 | 26篇 |
专业分类
33472篇 |
出版年
2020年 | 369篇 |
2019年 | 452篇 |
2018年 | 633篇 |
2017年 | 604篇 |
2016年 | 694篇 |
2015年 | 460篇 |
2014年 | 553篇 |
2013年 | 2497篇 |
2012年 | 1047篇 |
2011年 | 1038篇 |
2010年 | 636篇 |
2009年 | 699篇 |
2008年 | 876篇 |
2007年 | 902篇 |
2006年 | 791篇 |
2005年 | 696篇 |
2004年 | 667篇 |
2003年 | 622篇 |
2002年 | 644篇 |
2001年 | 1066篇 |
2000年 | 1071篇 |
1999年 | 788篇 |
1998年 | 333篇 |
1997年 | 307篇 |
1995年 | 311篇 |
1992年 | 640篇 |
1991年 | 601篇 |
1990年 | 584篇 |
1989年 | 556篇 |
1988年 | 547篇 |
1987年 | 492篇 |
1986年 | 489篇 |
1985年 | 531篇 |
1984年 | 436篇 |
1983年 | 399篇 |
1982年 | 313篇 |
1979年 | 476篇 |
1978年 | 333篇 |
1977年 | 302篇 |
1976年 | 321篇 |
1975年 | 367篇 |
1974年 | 441篇 |
1973年 | 467篇 |
1972年 | 403篇 |
1971年 | 344篇 |
1970年 | 324篇 |
1969年 | 341篇 |
1968年 | 421篇 |
1967年 | 378篇 |
1966年 | 360篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
992.
Multifactorial assessment of bulimia nervosa 总被引:1,自引:0,他引:1
D L Tobin C Johnson S Steinberg M Staats A B Dennis 《Journal of abnormal psychology》1991,100(1):14-21
We investigated a multifactorial approach to the assessment of bulimia nervosa by means of hierarchical factor analysis. Two hundred forty-five bulimia nervosa patients and 68 patients with either anorexia nervosa or eating disorders not otherwise specified were administered a self-report battery that was organized into 21 dimensions relevant to eating disorder patients. When dimensions from this battery were subjected to hierarchical factor analysis, support for bulimia nervosa as a unique diagnostic category was obtained. However, the emergence of 3 secondary factors and 6 primary factors suggests that bulimia nervosa can also be described more complexly. The emergence of a multifactorial model of bulimia nervosa that incorporates several existing undimensional models suggests the potential for both divergent and complicated clinical presentation in bulimia nervosa patients. 相似文献
993.
994.
On the semantic content of subcategorization frames 总被引:3,自引:1,他引:2
This paper investigates relations between the meanings of verbs and the syntactic structures in which they appear. This investigation is motivated by the enigmas as to how children discover verb meanings. Well-known problems with unconstrained induction of word meanings from observation of world circumstances suggest that additional constraints or sources of information are required. If there exist strong and reliable parallels between the structural and semantic properties of verbs, then an additional source of information about verb meanings is reliably present in each verb's linguistic context. Five experiments are presented which investigate the following hypothesis regarding the scope of these relations: The closer any two verbs in their semantic structure, the greater the overlap should be in their licensed syntactic structures. To investigate this hypothesis, data of two kinds were collected from different groups of subjects: (a) One group of subjects was asked to judge the semantic relatedness of verbs by selecting the semantic outlier in triads presented to them. (b) A second group of subjects was asked to judge the grammaticality of these same verbs in a large range of syntactic environments. These two types of data were then compared to assess the degree of correspondence in the two partitionings (syntactic and semantic) of the verb set. The findings, overall, support the view that the syntax of verbs is a quite regular, although complex, projection from their semantics. In conclusion, we discuss the kinds of features that are formally marked in syntactic structure and relate these to the problem of verb-vocabulary acquisition in young children. 相似文献
995.
Handedness among architects was determined by mail survey. Contrary to previous reports, no evidence was found of an excess of left-handers among a sample of 236 fully qualified male architects and 78 male architectural students. A second study examined whether the use of mail surveys systematically biases the returns of handedness questionnaires. For this, questionnaires were sent to 1,017 university students. No evidence was found for a bias amongst those who did and did not reply to the initial questionnaire. These results strengthen the findings of the first study. 相似文献
996.
In this study the long-term effectiveness of Social Skills Training (SST) and Rational Emotive Therapy (RET), on social phobia was studied, as well as the differential influence of patient characteristics on treatment effectiveness. Fifty-seven patients were assessed 14 months after the post-test. Results showed that long-term effectiveness was independent of the response-pattern of the patients. Comparisons between methods, irrespective of the response-pattern of the patients, showed no differences in effectiveness in favor of either SST or RET. Explorative analysis indicated the potential predictive power for treatment-outcome of confederate ratings of overt behavior on the SSIT. Patients who needed additional treatment appeared to perform significantly worse on this measure at the pretest. No factors could be traced that predict relapse after a relatively successful treatment. 相似文献
997.
S Bossert R G Laessle C Meiller M Junker H Ellgring K M Pirke 《Behaviour research and therapy》1991,29(4):337-341
The effects of 19 meals of different caloric content on slides on palatability and hypothetical duration of consumption were investigated in 7 patients with anorexia nervosa, 17 patients with bulimia nervosa at the beginning and after 8 weeks of hospital treatment. Nine healthy females served as controls. At the beginning of treatment, palatability of low caloric food was significantly higher and hypothetical duration of consumption of high caloric food was significantly longer in patients when compared to controls. After 8 weeks, in the patients palatability of low caloric food had decreased. Dislike for high caloric food remained stable in anorexics. 相似文献
998.
Anxiety induced by cardiac perceptions in patients with panic attacks: a field study 总被引:2,自引:1,他引:1
P Pauli C Marquardt L Hartl D O Nutzinger R H?lzl F Strian 《Behaviour research and therapy》1991,29(2):137-145
In panic disorder bodily sensations appear to play an important role as a trigger for anxiety. In our psychophysiological model of panic attacks we postulate the following vicious circle: individuals with panic attacks perceive even quite small increases in heart rate and interpret these changes as being catastrophic. This elicits anxiety and a further increase in heart rate. To evaluate this model we conducted a field study of 28 subjects with panic attacks and 20 healthy controls. A 24 hr ambulatory ECG was recorded and the subjects were instructed to report any cardiac perceptions during this period and to rate the anxiety elicited by these perceptions. The incidence of cardiac perceptions was about the same in both groups, but only subjects with panic attacks reported anxiety associated with such perceptions. Analysis of the ECGs revealed that in both groups heart rate accelerations preceded cardiac perceptions. Following cardiac perceptions, the healthy controls showed a heart rate deceleration, whereas the subjects with panic attacks had a further acceleration. This heart rate increase after cardiac perceptions was positively related to the level of anxiety elicited by the perceptions. These results provide clear evidence in support of the vicious circle model of panic attacks. 相似文献
999.
Handicapped individuals who have been taught spontaneous gesture requests often use only a small part of their vocabulary. Procedures to recover the unused part of this vocabulary have not been documented. This study was designed to identify procedures for increasing the proportion of gestures used spontaneously. Six mentally handicapped individuals served as subjects. After a baseline phase during which spontaneous gesture requests were reinforced, consequences were withheld for high-rate gesture requests. This led to an increase in different gesture requests. Although gesture requests did not return to baseline levels during a reversal condition, functional control was demonstrated by way of a multiple baseline across subjects. The absence of a reversal effect suggests enduring effects of the procedure. 相似文献
1000.
Multiple role juggling and daily mood states in working mothers: an experience sampling study 总被引:2,自引:0,他引:2
K J Williams J Suls G M Alliger S M Learner C K Wan 《The Journal of applied psychology》1991,76(5):664-674
The effects of multiple role juggling (i.e., simultaneously attending to demands of different roles) on daily mood states of employed mothers were examined. Ss completed activity and mood questionnaires 8 times a day for 8 days. Multiple role juggling had immediate negative effects on task enjoyment and mood. However, contrast effects and habituation to role juggling occurred when mood and satisfaction were examined over time. Furthermore, mood states tended to spill over from one episode to the next within a day, but contrast effects were found across days. These results reflect the complex nature of psychological adjustment to multiple role occupancy. 相似文献