全文获取类型
收费全文 | 1343篇 |
免费 | 77篇 |
国内免费 | 1篇 |
专业分类
1421篇 |
出版年
2023年 | 14篇 |
2021年 | 16篇 |
2020年 | 22篇 |
2019年 | 34篇 |
2018年 | 40篇 |
2017年 | 34篇 |
2016年 | 52篇 |
2015年 | 16篇 |
2014年 | 23篇 |
2013年 | 116篇 |
2012年 | 51篇 |
2011年 | 47篇 |
2010年 | 27篇 |
2009年 | 29篇 |
2008年 | 56篇 |
2007年 | 45篇 |
2006年 | 35篇 |
2005年 | 38篇 |
2004年 | 47篇 |
2003年 | 25篇 |
2002年 | 27篇 |
2001年 | 32篇 |
2000年 | 23篇 |
1999年 | 26篇 |
1998年 | 13篇 |
1997年 | 26篇 |
1996年 | 16篇 |
1995年 | 16篇 |
1994年 | 18篇 |
1992年 | 21篇 |
1991年 | 16篇 |
1990年 | 13篇 |
1989年 | 14篇 |
1988年 | 13篇 |
1987年 | 21篇 |
1985年 | 16篇 |
1984年 | 20篇 |
1983年 | 15篇 |
1982年 | 15篇 |
1981年 | 18篇 |
1979年 | 13篇 |
1978年 | 17篇 |
1976年 | 16篇 |
1975年 | 18篇 |
1974年 | 16篇 |
1973年 | 20篇 |
1972年 | 18篇 |
1971年 | 22篇 |
1968年 | 13篇 |
1965年 | 12篇 |
排序方式: 共有1421条查询结果,搜索用时 0 毫秒
171.
172.
173.
A rapid automatic technique for generating operant key-press behavior in rats 总被引:1,自引:1,他引:0 下载免费PDF全文
Experimentally naive rats were trained to key press on a fixed-ratio 10 schedule of food reinforcement by a completely automatic procedure within a single, 1-hr session. Control procedures demonstrated that the resulting behavior was an operant, under control of the schedule of reinforcement and the specified reinforcing stimulus (food). A simple, combination food-tray operandum, also described, was used as the basis for the training technique. 相似文献
174.
Stephen P. Davis 《Journal of Employment Counseling》1971,8(2):50-58
This study was done to find out if there are certain types of bias in the Interest Check List (ICL) used by employment counselors. If one analyzes the ICL in terms of modal Worker Trait Group (WTG) areas, the concern about the frequency of certain WTG areas takes on added importance. The issue is one of validity. Is it valid to say that if one responds positively to a WTG area that has only N=1 as compared to three positive responses for a WTG area that has N=12, the former is not a modal WTG? The exclusion of certain WTG areas from the ICL is discussed. A final issue is the orientation toward data-type jobs rather than people or thing jobs in the ICL. 相似文献
175.
Hall RV Fox R Willard D Goldsmith L Emerson M Owen M Davis F Porcia E 《Journal of applied behavior analysis》1971,4(2):141-149
Disputing and talking-out behaviors of individual pupils and entire classroom groups in special education classes and regular classes from white middle-class areas and from all black poverty areas ranging from the first grade to junior high school were studied. The classroom teacher in each case acted as the experimenter and as an observer. Various means of recording behaviors were used and reliability of observation was checked by an outside observer, another teacher, a teacher-aide, a student, or by using a tape recorder. Observation sessions varied from 15 min to an entire school day. After baseline rates were obtained, extinction of inappropriate disputing or talking-out behaviors and reinforcement of appropriate behavior with teacher attention, praise and in some cases a desired classroom activity or a surprise at the end of the week brought a decrease in undesired verbalizations. A reversal of contingencies brought a return to high levels of inappropriate talking with a return to low levels when reinforcement for appropriate talking was reinstated. The experiments demonstrated that teachers in a variety of classroom settings could obtain reliable observational records and carry out experimental manipulations successfully using resources available in most schools. 相似文献
176.
Measurement of specific anosmia 总被引:3,自引:0,他引:3
177.
178.
Christopher M. Davis 《Attention, perception & psychophysics》1974,16(1):67-69
Objects are lifted through a system of body levers and, since the force required to lift objects decreases as the effective lever length is shortened, it was hypothesized that the perceived heaviness of objects would be less when they were lifted with the elbow bent than with it extended. Cans lifted from greater initial angles were consistently judged to be lighter by blindfolded Ss. 相似文献
179.
180.