全文获取类型
收费全文 | 23421篇 |
免费 | 180篇 |
国内免费 | 4篇 |
出版年
2023年 | 38篇 |
2022年 | 41篇 |
2021年 | 60篇 |
2020年 | 87篇 |
2019年 | 102篇 |
2018年 | 3566篇 |
2017年 | 2902篇 |
2016年 | 2357篇 |
2015年 | 279篇 |
2014年 | 193篇 |
2013年 | 470篇 |
2012年 | 740篇 |
2011年 | 2526篇 |
2010年 | 2616篇 |
2009年 | 1550篇 |
2008年 | 1839篇 |
2007年 | 2297篇 |
2006年 | 163篇 |
2005年 | 319篇 |
2004年 | 259篇 |
2003年 | 216篇 |
2002年 | 155篇 |
2001年 | 75篇 |
2000年 | 91篇 |
1999年 | 58篇 |
1998年 | 49篇 |
1997年 | 41篇 |
1996年 | 39篇 |
1995年 | 24篇 |
1994年 | 24篇 |
1993年 | 19篇 |
1992年 | 28篇 |
1991年 | 23篇 |
1990年 | 28篇 |
1989年 | 15篇 |
1988年 | 24篇 |
1987年 | 20篇 |
1986年 | 19篇 |
1985年 | 14篇 |
1984年 | 25篇 |
1983年 | 11篇 |
1982年 | 12篇 |
1981年 | 13篇 |
1980年 | 11篇 |
1978年 | 12篇 |
1974年 | 10篇 |
1972年 | 14篇 |
1969年 | 13篇 |
1968年 | 10篇 |
1967年 | 9篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
Jos De Mul 《Man and World》1991,24(4):409-426
Paper delivered at theEighth International Human Science Research Conference at Aarhus University (Denmark), 18–22 August 1989. 相似文献
82.
An alternating least squares method for iteratively fitting the longitudinal reduced-rank regression model is proposed. The method uses ordinary least squares and majorization substeps to estimate the unknown parameters in the system and measurement equations of the model. In an example with cross-sectional data, it is shown how the results conform closely to results from eigenanalysis. Optimal scaling of nominal and ordinal variables is added in a third substep, and illustrated with two examples involving cross-sectional and longitudinal data.Financial support by the Institute for Traffic Safety Research (SWOV) in Leidschendam, The Netherlands is gratefully acknowledged. 相似文献
83.
Pierre Philippot Norbert Schwarz Pilar Carrera Nannes De Vries Nico W. Van Yperen 《European journal of social psychology》1991,21(4):293-302
Two experiments investigated whether the direction of priming effects depends on the processing stage at which the individual links the prime to a trait that is applicable to the evaluation of an ambiguously described target person. In line with previous research, it is hypothesized that assimilation effects will emerge when primes are processed in terms of a trait concept that is applicable to the encoding task. However, when the primes are not processed in applicable trait terms, they may still affect subsequent Judgments if the individual recalls the prime when judging the target along a trait dimension. In this case, the primes may serve as an anchor, resulting in contrast effects. Two experiments, in which subjects were primed with names of prototypically nice or hostile famous individuals under instructions that did or did not prompt subjects to process the prime in applicable trait terms, supported these hypotheses. Implications for the emergence of priming effects in everyday social interaction are discussed. 相似文献
84.
Sara Staats 《Current Psychology》1991,10(1-2):21-30
This is a preliminary report of a project designed to increase hope and quality of life (QOL) in older persons through a series
of five training sessions. The training sessions for the experimental groups are based on research on happiness, goal imagery,
and time management. Data indicates that the training is effective in increasing expected QOL.
Several measures of affect and stress are examined as a function of three time frames of self-reported QOL. Daily uplifts
are significantly related to present and future QOL while measures of stress and major life changes are not. Correlations
of affective measures with QOL tend to increase from time frames of the past five years through the present to the next five
years, indicating the relevance of hope for older persons. Training for increased hope works with older persons. Data obtained
in the process is used to address theoretical models of QOL in older persons.
This project was supported by a grant from the American Association of Retired Persons Andrus Foundation. 相似文献
85.
The midlife phase in the marital relationship is a complicated transition period, challenging the flexibility and coping skills of every couple. Separation-Divorce Initiation (S/DI) at this time can serve a special function in the change process required in this stage. A comprehensive therapeutic model for S/DI couples is described. It includes (1) assessment of the relationship's stamina and the function of the S/DI; (2) treating symptoms and reactions to the traumatic event in an emergency intervention mode; (3) steps and techniques to help the couple overcome the traumatic effects of the SD/I and to rebuild their relationship on a more appropriate basis. 相似文献
86.
Andre De Vries 《Theoretical medicine and bioethics》1982,3(1):115-120
Recently, the attitude and performance of the physician have been questioned and new codes of medical ethics have been introduced. Any ethics proposed for the future is a scenario reflecting the composer's selectivity. Envisaged ethics of truthful, non-paternalistic, responsible physician-patient interaction will have far-reaching implications for autopsy, euthanasia, abortion, suicide, genetic engineering, transplantation, clinical trials, status of the psychiatric patient, physician immunity and liability. Conflicts between personal and societal medical ethics may continue to be insoluble. A possible projection of the physician's ethics on that of the politician is discussed. A new medical ethics should encompass principles of different creeds and be supranational. 相似文献
87.
Henry J. De Haan 《Attention, perception & psychophysics》1982,32(1):27-31
The relationship between subjective estimates of the comprehensibility of connected, freerunning speech and rate of speech was investigated for each of two types of time-compressed speech: pitch-varying speeded speech and pitch-normalized compressed speech. The midpoints of the resulting functions approximated the values obtained by a previously described speechrate tracking method. For equivalent degrees of comprehensibility, rates were higher for compressed speech than for speeded speech, indicating that estimates are sensitive to the intelligibility of speech. Subjective estimates of comprehensibility of time-compressed speech provide a means of assessing the itelligibility of connected speech. 相似文献
88.
89.
Two pigeons were trained to peck a key under a free-operant avoidance schedule. Then, changes in key color signalled the beginning (safe period) and the end (warning period) of the response-shock interval, with a response required to change the key color. Finally, a change in key color signalled the warning period and either a response or a shock reinstated the safe stimulus. During signalled avoidance, response rate was higher during the warning stimulus than during the safe stimulus. More responding tended to occur in the warning stimulus when it was terminated by either a response or a shock than by only a response. In either procedure, response latency during the warning stimulus was a function of the duration of the warning stimulus. In general, response and shock rate were higher during unsignalled than during signalled avoidance. When the warning stimulus was brief, the results were similar to those of unsignalled avoidance. These results confirm previous findings with pigeons, are in general agreement with data provided by other species in studies of signalled avoidance, and thereby indicate the transituationality of the key-pecking operant. 相似文献
90.
Verbal rehearsal and selective attention in children with learning disabilities: A developmental lag
Sara G Tarver Daniel P Hallahan James M Kauffman Donald W Ball 《Journal of experimental child psychology》1976,22(3):375-385
To investigate the development of verbal rehearsal strategies and selective attention in learning disabled children, Hagen's Central-Incidental task was administered to younger learning disabled (M CA = 8.68 years) and normal (M CA = 8.62 years) boys in Experiment 1 and to intermediate (M CA = 10.18 years) and older (M CA = 13.48 years) learning disabled boys in Experiment 2. Also, in Experiment 2, an experimentally induced verbal rehearsal condition was included to determine its effects on serial recall and selective attention performance. In Experiment 1, the serial postion curve of the normals revealed both a primacy and a recency effect, whereas that of the learning disabled revealed a recency effect only. In Experiment 2, both the intermediate and the older learning disabled exhibited both primacy and recency effects under both standard and rehearsal conditions. A developmental analysis of central recall for the three learning disabled groups revealed constant age-related increases in overall central recall and in primacy recall. That the normals recalled more central, but not more incidental, information than the learning disabled in Experiment 1 suggests that the learning disabled are deficient in selective attention. Correlational findings suggest that the selective attention of the learning disabled improves with age. The results were interpreted as support for the hypothesis of a developmental lag in the learning disabled population. 相似文献