全文获取类型
收费全文 | 47856篇 |
免费 | 1656篇 |
国内免费 | 21篇 |
专业分类
49533篇 |
出版年
2018年 | 602篇 |
2017年 | 654篇 |
2016年 | 712篇 |
2015年 | 541篇 |
2014年 | 640篇 |
2013年 | 3447篇 |
2012年 | 1157篇 |
2011年 | 1225篇 |
2010年 | 782篇 |
2009年 | 774篇 |
2008年 | 1164篇 |
2007年 | 1055篇 |
2006年 | 975篇 |
2005年 | 899篇 |
2004年 | 859篇 |
2003年 | 876篇 |
2002年 | 912篇 |
2001年 | 1260篇 |
2000年 | 1241篇 |
1999年 | 929篇 |
1998年 | 478篇 |
1997年 | 485篇 |
1996年 | 465篇 |
1992年 | 901篇 |
1991年 | 840篇 |
1990年 | 862篇 |
1989年 | 832篇 |
1988年 | 787篇 |
1987年 | 777篇 |
1986年 | 840篇 |
1985年 | 862篇 |
1984年 | 733篇 |
1983年 | 677篇 |
1982年 | 496篇 |
1981年 | 555篇 |
1979年 | 799篇 |
1978年 | 614篇 |
1977年 | 542篇 |
1976年 | 543篇 |
1975年 | 704篇 |
1974年 | 837篇 |
1973年 | 885篇 |
1972年 | 703篇 |
1971年 | 718篇 |
1970年 | 670篇 |
1969年 | 709篇 |
1968年 | 880篇 |
1967年 | 810篇 |
1966年 | 812篇 |
1958年 | 467篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
121.
Finding the face in the crowd: an anger superiority effect 总被引:16,自引:0,他引:16
Facial gestures have been given an increasingly critical role in models of emotion. The biological significance of interindividual transmission of emotional signals is a pivotal assumption for placing the face in a central position in these models. This assumption invited a logical corollary, examined in this article: Face-processing should be highly efficient. Three experiments documented an asymmetry in the processing of emotionally discrepant faces embedded in crowds. The results suggested that threatening faces pop out of crowds, perhaps as a result of a preattentive, parallel search for signals of direct threat. 相似文献
122.
Some observations on control by spoken words in children's conditional discrimination and matching by exclusion 总被引:2,自引:0,他引:2
This study examined matching-to-sample procedures that might result in the emergence of conditional behavior never explicitly taught. Subjects were preschool children. Two pictures were displayed as comparisons on every trial, and samples were spoken words. In baseline training preceding each of three experiments, children learned to select pictures of a dog, a table, and a banana in response to their spoken English names. Thereafter, probe trials displayed novel comparisons with baseline comparisons: one novel comparison was displayed with the dog and another with the table. The three experiments differed primarily in the nature of the samples presented on probe trials. In Experiment 1, probe samples were novel words, "JAIJAI" and "BREEL." On the probes, each of seven subjects reliably selected the novel comparisons, apparently "excluding" the familiar ones. In Experiment 2, probe samples were from the subjects' baseline. On one probe, for example, the sample was "TABLE," and the subject had to choose either the dog or the novel picture. Exclusion was logically possible because the dog had always before been incorrect in the presence of "TABLE." Under these conditions, however, only two of nine children excluded reliably. In Experiment 3, probe samples were words that had never been samples on any matching-to-sample trial, but that had controlled the children's behavior in other settings. On one probe, for example, the sample was "PENCIL," and the subject had to choose either the dog or a novel picture. Subjects virtually always excluded the former and selected the latter. Unreliable exclusion in Experiment 2, therefore, apparently resulted because the probe samples had previously served also as samples on baseline trials. Spontaneous verbalizations recorded during probing provided further data consistent with this interpretation. The study helps to define variables controlling exclusion performances by showing that such performances are more likely to occur if the sample has no prior experimental history. 相似文献
123.
Effects of Social Demand on Reports of Self-Monitored Blood Glucose in Adolescents with Type 1 Diabetes Mellitus 总被引:2,自引:0,他引:2
Alan M. Delamater Steven M. Kurtz Neil H. White Julio V. Santiago 《Journal of applied social psychology》1988,18(6):491-502
The purpose of this study was to test the hypothesis that social demand could substantially affect reports of self-monitored blood glucose (BG) in adolescents with insulin-dependent diabetes mellitus. Of 34 patients initially enrolled in the study, 10 were excluded because they did not bring any BG records with them to an outpatient clinic appointment. The remaining 24 patients were randomly assigned to either a low or high social demand condition that provided instructions for monitoring of BG for the week following the appointment. The subjects' BG records were quantified to provide frequency of measurement and mean reported BG for the week prior to and after the clinic visit. Five subjects did not return their BG records for the week following the intervention. The analyses were therefore based on the 19 subjects from whom complete records were obtained. The 12 subjects in the low social demand group and 7 subjects in the high social demand group were equivalent with regard to age, duration of diabetes, socioeconomic status, and glycosylated hemoglobin. Frequency of BG measurement was similar in both groups during both weeks. The mean BG value reported in the week prior to intervention was similar for the groups. However, analyses of the post-intervention BGs revealed that subjects in the low-demand group reported significantly higher BGs compared to pre-intervention and to subjects in the high-demand group. These findings suggest that self-monitoring and reporting of BG is a social behavior that is affected by the demand characteristics of the interpersonal patient-health provider relationship. Because optimal treatment planning for individuals with diabetes requires accurate BG records, care must be taken to interpret them in light of the social demand characteristics associated with clinical assessment. 相似文献
124.
John W. Schuster David L. Gast Mark Wolery Sharon Guiltinan 《Journal of applied behavior analysis》1988,21(2):169-178
The effectiveness of a 5-s constant time-delay procedure to teach three chained food preparation behaviors to four moderately retarded adolescent students was evaluated within a multiple probe design across behaviors. Results indicate that the procedure was effective in teaching all four students to make a sandwich, boil a boil-in-bag item, and bake canned biscuits. The skills maintained with at least 85% accuracy over a 3-month period. Training generalized from the school to the home setting for the 2 subjects that completed generalization probe sessions. The percentage of errors across all skills and students was less than 9%. 相似文献
125.
A H Baker 《The Journal of general psychology》1988,115(2):161-170
In this study I explored whether the degree of anticipation/habituation (undershooting/overshooting) varies with the dimension to be localized, when the method of adjustment is used in space localization. In this study, undershooting occurred for both the vertical (Group 1) and the horizontal (Group 2) dimensions, but was significant only for verticality. The magnitude of undershooting observed for verticality was significantly greater than that for horizontality. A secondary issue regarding the possible relationship between spatial category width and undershooting/overshooting was examined. It was hypothesized that greater degree of spatial category width would be associated with greater undershooting. The opposite was found: Spatial category width was negatively related to undershooting. Finally, within each group, very high consistency of magnitude of spatial category width was observed (rs greater than .90), despite the fact that spatial category width showed shrinkage over the course of the study. 相似文献
126.
The effect of mood and pleasant versus unpleasant information feedback on performing a motor skill 总被引:1,自引:0,他引:1
M H Anshel 《The Journal of general psychology》1988,115(2):117-129
The effect of negative, positive, or neutral feedback on a rotary pursuit task as a function of the subject's depressed or elated mood was ascertained. Specifically, the self-schema hypothesis was examined. Ninety female volunteers, ranging in age from 18 to 25 years, participated. They were randomly assigned to one of eight conditions based on depressed or elated mood states, elicited by Velten's (1968) mood induction procedure, and feedback. A control group received no feedback and was not subjected to a mood inducing treatment. Baseline measures and changes in mood were determined by the Multiple Adjective Affective Checklist (MAACL). Bogus feedback was offered after all but one of the trials. The subjects' mood changed significantly during the mood-inducing treatment. For motor performance, partial support was lent to self-schema. Elated and depressed subjects performed best under positive and negative feedback, respectively. The effects, however, were temporary. 相似文献
127.
Herbert Sklar C.S.W. 《Journal of Contemporary Psychotherapy》1988,18(2):107-123
This paper emphasizes the impact of the setting, space, and general physical properties of the clinic upon the difficult patient's profound neediness and absence of inner regulatory structure. Moreover, the clinic's administrative style and requirements often related to fiscal restraints, demands for accountability for both how funds are spent and treatment outcome, all impinge upon the patient. Humanizing clinics so they have the capacity for psychotherapeutic holding and provision of safety for difficult patients are discussed in detail in this contribution. 相似文献
128.
129.
Depressed affect and time perception 总被引:1,自引:0,他引:1
130.