全文获取类型
收费全文 | 57225篇 |
免费 | 2083篇 |
国内免费 | 19篇 |
专业分类
59327篇 |
出版年
2018年 | 835篇 |
2017年 | 808篇 |
2016年 | 895篇 |
2015年 | 651篇 |
2014年 | 799篇 |
2013年 | 4963篇 |
2012年 | 1378篇 |
2011年 | 1458篇 |
2010年 | 956篇 |
2009年 | 908篇 |
2008年 | 1407篇 |
2007年 | 1254篇 |
2006年 | 1192篇 |
2005年 | 1022篇 |
2004年 | 1004篇 |
2003年 | 1018篇 |
2002年 | 1016篇 |
2001年 | 1679篇 |
2000年 | 1614篇 |
1999年 | 1263篇 |
1998年 | 599篇 |
1996年 | 696篇 |
1995年 | 676篇 |
1994年 | 629篇 |
1992年 | 1269篇 |
1991年 | 1151篇 |
1990年 | 1142篇 |
1989年 | 1030篇 |
1988年 | 1066篇 |
1987年 | 1004篇 |
1986年 | 1038篇 |
1985年 | 1040篇 |
1984年 | 914篇 |
1983年 | 774篇 |
1982年 | 606篇 |
1981年 | 645篇 |
1979年 | 902篇 |
1978年 | 705篇 |
1977年 | 594篇 |
1976年 | 635篇 |
1975年 | 810篇 |
1974年 | 887篇 |
1973年 | 974篇 |
1972年 | 835篇 |
1971年 | 789篇 |
1970年 | 711篇 |
1969年 | 725篇 |
1968年 | 893篇 |
1967年 | 798篇 |
1966年 | 802篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
901.
902.
903.
The relationship between basic research, theory, and clinical work with families is conceptualized during a discussion of Jamaican family structure and the application of change theory to a clinical case of depression in a Jamaican woman. It was found that three types of family structure are prevalent in Jamaica. The European ideal of a patriarchal-patrifocal structure creates problems for working-class Jamaicans. General system theory provides support for a different model. Change theory is applied to resolve the paradox created by the European model. 相似文献
904.
The belief that individual marital therapy (IMT) is an ineffective form of treatment for marriage problems and markedly inferior to the conjoint approaches has become almost an article of faith in family therapy circles. This position was originally advanced in the influential reviews of the research literature conducted by Gurman and Kniskern, and their conclusions have been cited in numerous other articles. This paper re-reviews the research studies purportedly supporting this conclusion and finds almost all of them to be invalidated by gross flaws in design and implementation. It is argued that from the highly inadequate evidence available, no conclusions can be reached concerning either the absolute or relative effectiveness of IMT. 相似文献
905.
The analysis of behavior sequences can be a useful technique for understanding family process and has been increasingly employed as a result of developments in family theory. Some of the most popular sequential analytic methods are reviewed, and problems of applying these methodologies to investigations of family interaction are discussed. Independence-of-observations, nonstationarity, and autocontingency are differentiated as three distinct types of serial dependence. In addition, issues concerning the choice of data type, analysis of low base rate behaviors, and the decision as to whether to correct for base rates are considered. Guidelines are presented for dealing with each of these issues in the context of the research or clinical question being addressed. 相似文献
906.
907.
Interventions were employed to program maintenance following correspondence training. The use of reinforcement of verbalization and a mixed sequence of procedures designed to establish indiscriminable contingencies was evaluated in multiple-baseline designs across subjects and behaviors. The results indicated that target behaviors were maintained under less intrusive interventions and in the absence of programmed contingencies during extended follow-up conditions. The results are discussed in terms of changes in reinforcement schedules established in maintenance interventions. 相似文献
908.
Pretrial publicity and a temporal interval between the news and trial were explored for their effects upon the jury's deliberation process and verdict. Publicity (neutral, negative) and trial timing (immediate, delayed) were manipulated in a 2 × 2 design. Twenty 12-person simulated juries were exposed either to neutral or negative publicity and viewed a videotaped criminal trial immediately following news exposure or after a one-week delay between news and trial. Dichotomous pre-and postdeliberation verdicts, probability of guilt scales, trial recall, ratings of companion jurors, perceptions of attorneys, assessments of the news article, and recall of news facts were measured. Deliberations were tape recorded and content analyzed. Juries exposed to neutral and negative publicity did not significantly differ on conviction rate, deliberation length, or on quality of deliberations. Prejudicial news elicited counter remarks about the threatening nature of the publicity to the defendant's right to a fair trial. Individual juror data revealed that while the news manipulation did not significantly affect predeliberation verdicts or attention to trial events, negative news lowered jurors' probability estimates of guilt and facilitated their recall of news facts. A discriminant analysis predicting jury verdict indicated a lack of support for prior research showing damaging effects from prejudicial pretrial publicity. Findings are explored for methodological implications and for usefulness of theoretical notions of reactance, and "sleeper effects". 相似文献
909.
Patrick C. Friman Jack W. Finney Stephen G. Glasscock John W. Weigel Edward R. Christophersen 《Journal of applied behavior analysis》1986,19(1):87-92
Testicular self-examination (TSE) can lead to early diagnosis and treatment of testicular cancer, the third leading cause of death in young men. We evaluated the effectiveness of a brief and specific checklist for teaching TSE skills. Ten men were videotaped while performing testicular self-examinations before and after training. The TSE training resulted in large and significant increases in the number of TSE steps completed and duration of the TSE. Two urological validation measures supported the improvements observed in the mens' self-examinations. Subjects reported continued performance of TSE during a follow-up telephone interview. This pilot study indicates that a brief and specific checklist is an effective strategy for teaching early cancer detection skills. 相似文献
910.
DOES EFFORT PLAY A ROLE IN THE EFFECT OF RESPONSE REQUIREMENTS ON DELAYED MATCHING TO SAMPLE? 总被引:2,自引:2,他引:0 下载免费PDF全文
The possible role of "effort" in the accuracy of pigeons' performance on a delayed matching-to-sample procedure was investigated by examining the effects of response requirements that accompanied a trial-initiating stimulus and that accompanied a sample stimulus. In the first experiment, the effect of varying the size of a fixed-ratio requirement for responses during an initiating stimulus was compared to that of varying a similar requirement for responses during the sample stimulus. Accuracy increased reliably with increases in the ratio scheduled during the sample stimulus, but was not significantly affected by increases in the ratio scheduled on the key during the initiating stimulus. In another phase of Experiment 1, sample duration was held constant while the ratio requirement was varied during the initiating stimulus. Again, accuracy of matching to sample was not significantly affected by the size of the ratio scheduled during the initiating stimulus. Experiment 2 provided a systematic replication of these results in another group of pigeons and included a more detailed analysis of responding. These results support the view that increases in sample-response requirement facilitate accuracy of delayed matching by increasing the durations of exposure to the sample stimuli, and do not support a role of effort in the sample-response effect. In Experiment 3, the facilitative effect of responses on the sample but not of those on the initiating stimulus was replicated using a simultaneous matching-to-sample procedure. This finding provides further evidence against an interpretation of response-requirement effects that appeals to effort; the finding also suggests that sample exposure might affect initial discrimination of the sample rather than remembering the sample. 相似文献