全文获取类型
收费全文 | 176263篇 |
免费 | 7787篇 |
国内免费 | 165篇 |
专业分类
184215篇 |
出版年
2021年 | 1515篇 |
2020年 | 2800篇 |
2019年 | 3458篇 |
2018年 | 3606篇 |
2017年 | 4047篇 |
2016年 | 4685篇 |
2015年 | 3932篇 |
2014年 | 4819篇 |
2013年 | 23493篇 |
2012年 | 4806篇 |
2011年 | 3869篇 |
2010年 | 4011篇 |
2009年 | 4812篇 |
2008年 | 4081篇 |
2007年 | 3671篇 |
2006年 | 4219篇 |
2005年 | 4144篇 |
2004年 | 3614篇 |
2003年 | 3240篇 |
2002年 | 3061篇 |
2001年 | 3381篇 |
2000年 | 3214篇 |
1999年 | 3227篇 |
1998年 | 2822篇 |
1997年 | 2663篇 |
1996年 | 2570篇 |
1995年 | 2438篇 |
1994年 | 2380篇 |
1993年 | 2336篇 |
1992年 | 2686篇 |
1991年 | 2480篇 |
1990年 | 2379篇 |
1989年 | 2258篇 |
1988年 | 2249篇 |
1987年 | 2255篇 |
1986年 | 2224篇 |
1985年 | 2409篇 |
1984年 | 2532篇 |
1983年 | 2328篇 |
1982年 | 2369篇 |
1981年 | 2339篇 |
1980年 | 2190篇 |
1979年 | 2255篇 |
1978年 | 2195篇 |
1977年 | 2146篇 |
1976年 | 1961篇 |
1975年 | 2033篇 |
1974年 | 2084篇 |
1973年 | 1984篇 |
1972年 | 1531篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
811.
812.
Two experiments are reported which investigated how subject gender and time-of-day influenced the estimation of duration and
the perception of task-related mental workload. In the first experiment, 24 subjects performed a filled time-estimation task
in a constant blacked-out, noise-reduced environment at 0800h, 1200h, 1600h, and 2000h, respectively. In the second experiment,
12 different subjects performed an unfilled time estimation task in similar conditions at 0900h, 1400h, and 1900h. At the
termination of all experimental sessions, participants completed the NASA Task Load Index workload assessment questionnaire
as a measure of perceived mental workload. Results indicated that physiological response, reflected in body temperature change,
followed an expected pattern of sequential increase with time-of-day. However, estimates of duration and the perception of
mental workload showed no significant effects for time-of-day. In each of the experiments there were significant differences
in time estimation and mental workload response contingent on the gender of the participant. These results are interpreted
in light of the previous positive findings for circadian fluctuation in performance efficiency and the equivocal findings
of a gender difference in time estimation. A unifying account of these collective results is given based on gender by time-of-day
interactional effects.
An earlier version of this paper was presented at the 32nd Annual Meeting of the Human Factors Society, Anaheim, CA, October,
1988. 相似文献
813.
This study sought to investigate the effects of mild head injury on a particular type of cognitive ability, verbal analogical
reasoning. The performance of 19 individuals with head injuries was compared to a group of 30 control subjects matched for
age, education, and gender on 100 verbal analogies. Solution times and error rates were modeled. Unstandardized regression
weights for individual subjects were correlated with subjects’ performance on a number of standardized ability tests. Results
showed that compared to the control subjects, the head injured subjects: (a) were significantly slower to solve the analogies,
and were particularly slow to perform certain processes: encoding/inference and comparison; (b) tended to show greater variability
in performance; and (c) had data that had a poorer componential model fit. The data suggest that analogical reasoning is affected
by a head injury, and that certain information processes may be responsible for performance deficits. 相似文献
814.
M. S. Singer 《Current Psychology》1992,11(2):128-144
This study attempted to apply the relative deprivation theory to preferential selection research. Two questions were addressed
in this context: First, does preferential selection cause feelings of injustice or deprivation? and, second, can the magnitude
of such feelings of injustice be predicted? A questionnaire was designed to assess fairness perceptions of all types of selection
outcomes: preferential selection; together with selection involving discrimination against minorities and selections without
either forms of discrimination. Results showed that preferential selection caused feelings of injustice. The level of felt
injustice associated with preferential selection was identical to that due to discrimination against minorities. Further,
the magnitude of felt injustice due to preferential selection could be predicted by the size of the discrepancy in “performance-relevant
merits” between the selected minority candidate and the unsuccessful majority candidate. The study also compared effects of
the “self-other” comparison process, used in previous relative deprivation research, and a “other-other” comparison process
on justice perception. Implications of the results for the application of relative deprivation theory to preferential selection
research were discussed. 相似文献
815.
Psychological knowledge from eye-witness research is applied here to the particular problem of reporting road accidents. Thereby
the paper highlights some of the assumptions in eye-witness research. The interface between that research and the reporting
of road accidents is examined by reference to existing social psychological notions. These are notions about questioning and
about hypothesis testing. The paper makes special reference to the questioning of child witnesses because problems therein
are particularly acute. 相似文献
816.
Measures of spatial cognition, neighborhood knowledge, and neighborhood use from the research described by Walsh, Krauss, and Regnier (1981) were examined to determine if laboratory tests of spatial cognition were significant predictors of older adults' use of their neighborhoods. The overall results show that laboratory-based measures of spatial cognition and subjects' knowledge of their neighborhoods are both significant predictors of their use of neighborhood goods and services. The ability to learn and remember the location and orientation of objects, when contextual cues were not provided at test, was more predictive of the participants' neighborhood use than either the participants' number of years in the neighborhood or their mobility. Spatial memory as measured by the Educational Testing Service Building Memory task predicted neighborhood knowledge, which was predictive of neighborhood use. 相似文献
817.
Eighty younger (less than 50 years, M = 28 years) and 80 older (more than 50 years, M = 69 years) Type A and Type B Ss were evaluated for Type A behavior pattern using the Structured Interview (SI) and given personality tests for anxiety, depression, anger, aggression, hostility, and anger-in-anger-out. Ss also underwent an emotion induction procedure. Videotapes of the emotion induction procedure (N = 160) and the SI (N = 80) were coded for facial expression of emotion. Type As did not differ from Bs on anxiety or depression but did on anger and aggression. Type As showed anger inhibition and anger bound to shame, as predicted by emotion socialization theory. The greatest number of differential effects were observed between age groups. Older individuals, in general, were more emotionally expressive than younger Ss across a range of emotions. Women appeared more conflicted about anger expression than men, and Type A women more so than Type A men. 相似文献
818.
The authors used a correlated motion paradigm to investigate the effects of aging and gender on motion sensitivity. In 2 experiments with a total of 50 elderly and 50 young subjects, motion thresholds were significantly higher for elderly women. The correlated motion signal, which was embedded in random motion, may have been coherent to subjects in much the same way a form is in Witkin's Embedded Figures Test (EFT). In Experiment 2, EFT scores were obtained. A significant positive relationship between motion thresholds and EFT performance was found within each age group. Although gender-related perceptual style differences may contribute to motion perception effects, the authors argue that a common neural factor contributes to performance on both the EFT and the correlated motion task. 相似文献
819.
Hayes LJ 《The Behavior analyst / MABA》1992,15(2):139-145
The present paper compares behavior-analytic and cognitive treatments of the concept of psychological history with regard to its role in current action. Both treatments take the position that the past bears some responsibility for the present, and are thereby obligated to find a means of actualizing the past in the present. Both do so by arguing that the past is brought to bear in the present via the organism. Although the arguments of the two positions differ on this issue, neither provides a complete account. An unconventional treatment of psychological history is proposed, the logic of which is exemplified in anthropological, biological, and psychological perspectives. The unconventional treatment in psychological perspective holds that (a) the organism's interaction with its environment, not the organism itself, changes with experience; and (b) the past interactions of an organism exist as, and only as, the present interactions of that organism. This solution to the problem of psychological history provides obligations and opportunities for analysis that are not available when the more conventional positions of cognitivism and behavior analysis are adopted. 相似文献
820.