全文获取类型
收费全文 | 684篇 |
免费 | 42篇 |
出版年
2020年 | 11篇 |
2019年 | 9篇 |
2018年 | 15篇 |
2017年 | 19篇 |
2016年 | 14篇 |
2015年 | 11篇 |
2014年 | 11篇 |
2013年 | 70篇 |
2012年 | 23篇 |
2011年 | 27篇 |
2010年 | 20篇 |
2009年 | 15篇 |
2008年 | 21篇 |
2007年 | 19篇 |
2006年 | 21篇 |
2005年 | 22篇 |
2004年 | 16篇 |
2003年 | 22篇 |
2002年 | 16篇 |
2001年 | 17篇 |
2000年 | 27篇 |
1999年 | 20篇 |
1998年 | 14篇 |
1997年 | 13篇 |
1996年 | 6篇 |
1994年 | 6篇 |
1993年 | 8篇 |
1992年 | 7篇 |
1991年 | 9篇 |
1990年 | 6篇 |
1989年 | 6篇 |
1987年 | 11篇 |
1986年 | 13篇 |
1985年 | 7篇 |
1984年 | 12篇 |
1983年 | 15篇 |
1982年 | 9篇 |
1980年 | 6篇 |
1979年 | 13篇 |
1977年 | 8篇 |
1976年 | 11篇 |
1975年 | 8篇 |
1974年 | 9篇 |
1973年 | 9篇 |
1972年 | 8篇 |
1971年 | 8篇 |
1970年 | 6篇 |
1968年 | 7篇 |
1967年 | 10篇 |
1966年 | 5篇 |
排序方式: 共有726条查询结果,搜索用时 15 毫秒
31.
32.
Digital music synthesizers represent audio signals in the form of binary coded numbers. These binary coded numbers can be manipulated by the operator, thereby altering the audio signal in a variety of ways. The present article describes how these capabilities can be used to produce perfectly aligned dichotic tapes in which the stimulus items are matched on all extraneous (timbre, amplitude, duration) factors. 相似文献
33.
Ira M. Schwartz 《Behavioral sciences & the law》1991,9(2):189-199
This paper describes the recent trends in the child welfare and children's mental health systems and their implications for public policy. Despite the rhetoric calling for preserving families and treating children and youth in their own homes, the best available evidence indicates that the rates of out-of-home placement are increasing at an alarming rate. More concerted and comprehensive efforts are needed if this trend is to be reversed in the near future. 相似文献
34.
Interval and ratio reinforcement of a complex sequential operant in pigeons 总被引:2,自引:2,他引:0 下载免费PDF全文
Schwartz B 《Journal of the experimental analysis of behavior》1982,37(3):349-357
Pigeons were required to produce exactly four pecks on each of two keys in any order for reinforcement. Correct response sequences were reinforced on either fixed-interval two-minute or fixed-ratio four schedules, with each correct sequence treated as a single response. Each pigeon developed a particular dominant sequence that accounted for more than 80% of all sequences. Sequence stereotypy was relatively unaffected by the temporal properties of the fixed-interval and fixed-ratio schedules. Response time (time from the first response in each sequence to the last) was also relatively unaffected by the temporal properties of the schedules. In contrast, response latency (time from end of one sequence to the beginning of the next) was markedly affected by the schedules. Latencies were long early in the interreinforcement interval and got shorter as the interreinforcement interval progressed. These data suggest that stereotyped response sequences become functional behavioral units, resistant to disruption or alteration by reinforcement variables that ordinarily influence the temporal spacing of individual responses. 相似文献
35.
The notion that verbal ability is related to mental processing speed was examined using tasks that systematically varied in semantic content. Subjects' reaction times were measured in five tasks involving arrow matching, physical identity word matching, or taxonomic identity word matching. The findings indicated that matching tasks using different decision rules and different stimuli were all related to verbal ability. In fact, reaction time for subjects required to judge whether two arrows pointed in the same direction was the best predictor of verbal ability. One explanation of the results is that speed of information processing (a general factor) may be the important component of verbal ability which is measured by seemingly different matching tasks. 相似文献
36.
Chunking in recall of symbolic drawings 总被引:4,自引:0,他引:4
Three experiments explored memory for symbolic circuit drawings using skilled electronics technicians and novice subjects. In the first experiment a skilled technician reconstructed circuit diagrams from memory. Recall showed marked “chunking”, or grouping, by functional units similar to Chess Masters’ recall of chess positions. In the second experiment skilled technicians were able to recall more than were novice subjects following a brief exposure of the drawings. This advantage did not hold for randomly arranged symbols. In the third experiment the size of chunks retrieved systematically increased with additional study time. Supplementary analyses suggested that the chunking by skilled subjects was not an artifact of spatial proximity and chunk statistics, and that severe constraints are placed on any explanation of the data based on guessing. It is proposed that skilled subjects identify the conceptual category for an entire drawing, and retrieve elements using a generate-and-test process. 相似文献
37.
Two types of pigeon key pecking: suppression of long- but not short-duration key pecks by duration-dependent shock 下载免费PDF全文
Schwartz B 《Journal of the experimental analysis of behavior》1977,27(2):393-398
The key pecking of eight pigeons was maintained on a variable-interval 1-minute schedule of food reinforcement. Sometimes, all responses between 35 and 50 milliseconds in duration produced a shock; sometimes, all responses between 10 and 25 milliseconds produced a shock; sometimes, shocks were produced by pecks without regard to duration (nondifferential punishment), and sometimes shocks were delivered independently of responding. Punishment of 35- to 50-millisecond responses selectively suppressed those responses, while punishment of 10- to 25-millisecond responses and nondifferential punishment suppressed responding overall but did not suppress responses of particular duration. Punishment of 35- to 50-millisecond responses suppressed key pecking slightly less than did nondifferential punishment. Punishment of 10- to 25-millisecond responses and response-independent shock produced roughly equal amounts of suppression, substantially less than the other punishment procedures. The data support the view that there are at least two kinds of key peck, identifiable on the basis of duration, one of which (short duration) is insensitive to its consequences. 相似文献
38.
Subjects were assigned to use either three or six categories and were given either 5 or 10 trials in a word-sorting task. Subsequent to sorting, they recalled as many words as they could. A measure of sorting consistency showed that the six-category sort was a more difficult task than was the three-category sort. Number of categories did not have a significant effect on recall performance regardless of whether 5 or 10 sorting trials were used. A correlational analysis raised questions about the relationship of the sorting tasks to recall performance and clustering. 相似文献
39.
G M Schwartz H S Hoffman C L Stitt R R Marsh 《Journal of experimental psychology. Animal behavior processes》1976,2(1):28-37
Male hooded and albino rats were exposed to a light flash followed at various temporal intervals by a startle-eliciting 117 db. (re 20 muN/m2) burst of white noise. The visual stimulus engendered startle response inhibition (maximally when the lead time was 64-250 msec) as well as startle response latency reduction (maximally when the lead time was 2-8 msec). The temporal functions for the effects of visual stimuli paralleled those previously reported for startle modification by acoustic events. Further study revealed that, given optimal lead times, inhibition is produced reliably by weaker visual stimuli (3 X 10-6 cd-sec/cm2) than latency reduction (3 X 10-4 cd-sec/cm2). This differential sensitivity to visual stimuli is also analogous to previously reported findings for events in the acoustic environment. It reveals that the neural mechanisms that mediate latency reduction and inhibition can be engaged by either acoustic or visual stimulation. 相似文献
40.
Dr. Valerie Klinge Thomas Rodziewicz Linda Schwartz 《Journal of abnormal child psychology》1976,4(1):73-81
The present study compared the WISC and WISC-R on a group of psychiatric adolescent inpatients. The results indicated high intercorrelations between the two test versions but with the correlations linearly related to the changes in content and administration rules of the WISC-R. Analyses of variance indicated that, on the basis of the Full Scale IQ, the WISC is an easier test than the WISC-R.The authors gratefully acknowledge the assistance of Ms. Kathleen Lennox for her aid in data analysis and computer programming. 相似文献