全文获取类型
收费全文 | 3079篇 |
免费 | 150篇 |
国内免费 | 1篇 |
出版年
2023年 | 22篇 |
2022年 | 18篇 |
2021年 | 32篇 |
2020年 | 50篇 |
2019年 | 60篇 |
2018年 | 86篇 |
2017年 | 102篇 |
2016年 | 129篇 |
2015年 | 67篇 |
2014年 | 96篇 |
2013年 | 359篇 |
2012年 | 160篇 |
2011年 | 165篇 |
2010年 | 106篇 |
2009年 | 95篇 |
2008年 | 147篇 |
2007年 | 130篇 |
2006年 | 116篇 |
2005年 | 104篇 |
2004年 | 111篇 |
2003年 | 102篇 |
2002年 | 69篇 |
2001年 | 67篇 |
2000年 | 57篇 |
1999年 | 42篇 |
1998年 | 36篇 |
1997年 | 42篇 |
1996年 | 35篇 |
1995年 | 42篇 |
1994年 | 26篇 |
1993年 | 38篇 |
1992年 | 35篇 |
1991年 | 32篇 |
1990年 | 33篇 |
1989年 | 21篇 |
1988年 | 31篇 |
1987年 | 17篇 |
1986年 | 14篇 |
1985年 | 24篇 |
1984年 | 24篇 |
1983年 | 16篇 |
1982年 | 24篇 |
1979年 | 21篇 |
1978年 | 13篇 |
1977年 | 20篇 |
1974年 | 18篇 |
1972年 | 18篇 |
1971年 | 12篇 |
1970年 | 12篇 |
1968年 | 13篇 |
排序方式: 共有3230条查询结果,搜索用时 0 毫秒
31.
Racial reckoning is defined as the subjugation of Black, Indigenous, and people of Color (BIPOC) to racial hierarchies and subordinate groups that influence multiple well-being outcomes throughout the developmental lifespan and across generations. With the two pandemics of racial reckoning and COVID-19 amidst a growing controversial political landscape, topics around civic engagement have been brought to the forefront of community conversation. Discussions surrounding civic engagement must go beyond addressing issues of public concern and examine the vehicle in which civic engagement may be delivered. This is becoming increasingly important as civic engagement is one of the main avenues of social change through individual and collective action, particularly regarding racial reckoning and healthcare disparities highlighted by COVID-19. The paper focuses on civic engagement among ethnic minority youth and young adults. An integrated model of civic engagement was created based off what was learned through this review. This proposed model of civic engagement is meant to be the first step to addressing the gap in civic engagement literature for ethnic minority youth. Weaknesses and future considerations regarding the model will also be discussed, as well as any implications for ethnic minority youth and young adults. 相似文献
32.
Patrick Murphy Jennifer Foley Joe Mole Natasja Van Harskamp Lisa Cipolotti 《Journal of Neuropsychology》2023,17(2):417-429
Raven's Advanced Progressive Matrices (APM) Set I is a validated and brief test of fluid intelligence, ideal for use in busy clinical settings. However, there is a dearth of normative data allowing an accurate interpretation of APM scores. To address this, we present normative data from across the adult lifespan (18–89 years) for the APM Set I. Data are presented in five age cohorts (total N = 352), including two older adult cohorts (65–79 years and 80–89 years), which allows age-standardized assessment. We also present data from a validated measure of premorbid intellectual ability, which was absent from previous standardizations of longer forms of the APM. In line with previous findings, a striking age-related decline was noted, beginning relatively early in adulthood and most marked amongst lower-scoring individuals. Older adults did not demonstrate difficulty with specific test items or make an increased proportion of specific errors. Sex was not a significant predictor of performance. The data set is of particular use in the neuropsychological assessment of older adults, given the known susceptibility of fluid intelligence to both the effects of normal ageing and acquired brain injury in older age. The results are discussed in light of theories of neurological ageing. 相似文献
33.
B auer M arianne Relations between prediction- and estimation-responses in cue-probability learning and transfer. Scand. J. Psychol ., 1972, 13 , 198–207. —Comparisons were made between prediction- and estimation-responses, preceded by training with different types of responding and when task probabilities were shifted. The main results were: ( a ) differential effects of procedure of learning and shift in task structure on predictions and estimates support the hypothesis of two different processes, ( b ) estimates as indicators of probability learning reflect traits assumed to characterize the perception process, viz. sensitivity to shifts in probabilities, and robustness against influence from procedure of learning, and ( c ) prediction-responses were affected in the direction of more extreme responses by simultaneous estimation, which result strengthens the supposition that probability estimates are insufficient as indicators of the complete perception process in a prediction task. 相似文献
34.
Paul E. Van Hemel 《Journal of the experimental analysis of behavior》1972,17(2):237-245
Two experiments examined mouse killing as a reinforcer of key pressing by rats that killed mice. In Experiment I, mouse-killing rats performed the key-pressing response when each press was reinforced with presentation of a mouse. Offered a choice between a key that yielded presentation of mice and one that did not, the rats preferred the key that yielded mice. When the contingency was reversed, the rats preferred the other key and continued to kill mice. In Experiment II, mouse-killing rats that did not kill rat pups performed a key-pressing response reinforced with presentation of mice on a variable-interval schedule. In tests for responding reinforced on that schedule with presentation of normal mice, anesthetized mice, dead mice, or rat pups, these rats that killed mice but not rat pups exhibited a decline in response rate when rat pups were the reinforcer. Altering the condition of the mice did not significantly affect performance. 相似文献
35.
In two experiments, the effect of an illuminated response key on the acquisition of stimulus control by an airflow stimulus was assessed. In the first experiment, pigeons were given nondifferential training with airflow emerging from behind the response key in one of three conditions of illumination: trained to peck a lighted key, trained to peck an unlighted key with a houselight present, trained to peck a key in total darkness. After 10 days of training on a variable-interval schedule of reinforcement, all subjects were given a generalization test on airflow velocity. The gradients for subjects trained in the dark were sharp, while those for subjects trained in lighted conditions were shallow. In the second experiment, the effect of an irrelevant keylight on the acquisition of an airflow velocity discrimination was assessed. Two groups of pigeons were trained to discriminate two airflow velocities. One group was trained with a lighted response key and the other was trained to peck the response key in total darkness. The dark-trained subjects acquired the discrimination more rapidly. The results demonstrate that the acquisition of stimulus control by airflow with either a differential or nondifferential training procedure can be overshadowed by keylight. 相似文献
36.
37.
38.
Marianne Frankenhaeuser Gundla Järpe H. Svan B. Wrangsjö 《Scandinavian journal of psychology》1963,4(1):245-250
Reactions to a placebo introduced either as a depressant or as a stimulant drug were examined in 16 healthy female subjects. Comparisons between pre- and post-placebo measurements showed that the two treatments produced marked effects in opposite directions: (1) the 'depressant' placebo produced a statistically significant decrease in pulse rate, blood pressure, objective and subjective reaction speed, as well as significant effects on subjective mood in the expected directions, and (2) the 'stimulant' placebo produced opposite and significant changes in all variables. The subjective reactions were, on the whole, more pronounced than the effects on performance and physiological functions. 相似文献
39.
40.
Ragnar Hagdahl Marianne Frankenhaeuser Bertil Wolff 《Scandinavian journal of psychology》1967,8(1):251-256
Skin conductance and heart rate were continuously recorded in 8 subjects repeatedly exposed to a perceptual-conflict test and to auditory signals. (1) Both complex and simple stimuli gave rise to a pronounced increase in skin conductance, the magnitude of response decreasing with number of repetitions. For both types of stimuli a linear relationship was obtained when GSR, measured as the change in log conductance, was plotted against the logarithm of the stimulus number. (2) Each presentation of the conflict test increased heart rate, magnitude of change decreasing approximately linearly with number of trials. 相似文献