全文获取类型
收费全文 | 51037篇 |
免费 | 1998篇 |
国内免费 | 33篇 |
出版年
2020年 | 522篇 |
2019年 | 598篇 |
2018年 | 886篇 |
2017年 | 898篇 |
2016年 | 968篇 |
2015年 | 639篇 |
2014年 | 807篇 |
2013年 | 3928篇 |
2012年 | 1533篇 |
2011年 | 1576篇 |
2010年 | 953篇 |
2009年 | 995篇 |
2008年 | 1319篇 |
2007年 | 1347篇 |
2006年 | 1198篇 |
2005年 | 1079篇 |
2004年 | 1040篇 |
2003年 | 963篇 |
2002年 | 1024篇 |
2001年 | 1661篇 |
2000年 | 1664篇 |
1999年 | 1243篇 |
1998年 | 561篇 |
1997年 | 490篇 |
1993年 | 471篇 |
1992年 | 1005篇 |
1991年 | 923篇 |
1990年 | 950篇 |
1989年 | 898篇 |
1988年 | 866篇 |
1987年 | 840篇 |
1986年 | 844篇 |
1985年 | 906篇 |
1984年 | 737篇 |
1983年 | 668篇 |
1982年 | 524篇 |
1979年 | 804篇 |
1978年 | 583篇 |
1977年 | 532篇 |
1976年 | 520篇 |
1975年 | 676篇 |
1974年 | 763篇 |
1973年 | 767篇 |
1972年 | 681篇 |
1971年 | 600篇 |
1970年 | 540篇 |
1969年 | 630篇 |
1968年 | 745篇 |
1967年 | 662篇 |
1966年 | 649篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
871.
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
872.
873.
874.
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
875.
876.
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
877.
Thomas G. Haring Blair Roger Mellanie Lee Catherine Breen Robert Gaylord-Ross 《Journal of applied behavior analysis》1986,19(2):159-171
Three students with moderate handicaps were taught to initiate and expand on conversational topics. The teaching procedure used stimuli generated from actual conversations with nonhandicapped peers. Generalization was assessed by audiotaping conversations between the handicapped students and their peers in natural school contexts without adult supervision. Results indicated that training generalized to natural contexts. These results were socially validated by undergraduate special education students, who rated tapes of two of the students' conversations during training phases as more socially competent than during baseline. Results are discussed in terms of the evaluation of complex social behavior as multioperant behaviors. 相似文献
878.
Observational learning of two visual discriminations by pigeons: a within-subjects design.
下载免费PDF全文
![点击此处可从《Journal of the experimental analysis of behavior》网站下载免费的PDF全文](/ch/ext_images/free.gif)
G B Biederman H A Robertson M Vanayan 《Journal of the experimental analysis of behavior》1986,46(1):45-49
Pigeon's observational learning of successive visual discrimination was studied using within-subject comparisons of data from three experimental conditions. Two pairs of discriminative stimuli were used; each bird was exposed to two of the three experimental conditions, with different pairs of stimuli used in a given bird's two conditions. In one condition, observers were exposed to visual discriminative stimuli only. In a second condition, subjects were exposed to a randomly alternating sequence of two stimuli where the one that would subsequently be used as S+ was paired with the operation of the grain magazine. In a third experimental condition, subjects were exposed to the performance of a conspecific in the operant discrimination procedure. After exposures to conspecific performances, there was facilitation of discriminative learning, relative to that which followed exposures to stimulus and reinforcement sequences or exposures to stimulus sequences alone. Exposure to stimulus and food-delivery sequences enhanced performance relative to exposure to stimulus sequences alone. The differential effects of these three types of exposure were not attributable to order effects or to task difficulty; rather, they clearly were due to the type of exposure. 相似文献
879.
Behavioral contrast in fixed-interval components: effects of extinction-component duration.
下载免费PDF全文
![点击此处可从《Journal of the experimental analysis of behavior》网站下载免费的PDF全文](/ch/ext_images/free.gif)
J C de Rose 《Journal of the experimental analysis of behavior》1986,45(2):175-188
Seven albino rats were exposed to a multiple schedule of reinforcement in which the two components (fixed interval and extinction) alternated such that a presentation of the extinction component followed each fixed-interval reinforcement. In baseline sessions, the duration of the extinction component was constant and always one-third of the fixed-interval value. Probe sessions contained a probe segment in which the duration of the extinction component was increased; the response rate in fixed-interval components during the probe segment was compared with the response rate in the segments preceding and following the probe. The effect of increasing the duration of the extinction component was studied under three values of fixed interval: 30 s, 120 s, and 18 s, in three successive conditions. Response rate within fixed intervals was a direct function of duration of the extinction component. Pausing at the beginning of the fixed interval decreased as extinction duration increased. These effects were larger and more consistent for the shorter fixed-interval values (18 s and 30 s). These results indicate a functional relation between relative component duration and responding. For the component providing more frequent reinforcement, this could be stated as an inverse relationship between relative component duration and response rate. This relation is similar to findings regarding the ratio of trial and intertrial duration in Pavlovian conditioning procedures, and suggests that behavioral contrast may be related to Pavlovian contingencies underlying the multiple schedule. 相似文献
880.
Three experiments describe the effects of manipulating the frequency of response-reinforcer contiguity in a recycling conjunctive schedule. The schedule arranged that a reinforcer was delivered after 30 s provided at least one response had occurred; otherwise the next cycle started immediately. In Experiment 1, this schedule produced the typical pause–respond–pause pattern, with most responses at mid-interval; and, when a limited number of contiguities between responses and food delivery were added, the pattern became more like the monotonic scallop seen on fixed-interval schedules. In Experiment 2, the schedule was initially presented with an additional contingency that allowed contiguity on every trial. Fixed-interval-like behavior occurred and tended to persist as contiguities were gradually eliminated. In Experiment 3, the recycling conjunctive schedule alternated with a condition in which a large number of contiguities occurred. The pause–respond–pause pattern and fixed-interval-like performance occurred with few or many contiguities, respectively. The results of all three experiments illustrate how contiguity interacts with a small number of other variables to determine performance on interval schedules and illuminate previous findings with fixed-interval and fixed-time schedules. 相似文献