全文获取类型
收费全文 | 80789篇 |
免费 | 1661篇 |
国内免费 | 4篇 |
专业分类
82454篇 |
出版年
2019年 | 931篇 |
2018年 | 1266篇 |
2017年 | 1303篇 |
2016年 | 1397篇 |
2015年 | 1020篇 |
2014年 | 1230篇 |
2013年 | 5837篇 |
2012年 | 2247篇 |
2011年 | 2434篇 |
2010年 | 1554篇 |
2009年 | 1498篇 |
2008年 | 2161篇 |
2007年 | 2146篇 |
2006年 | 1983篇 |
2005年 | 1734篇 |
2004年 | 1630篇 |
2003年 | 1573篇 |
2002年 | 1672篇 |
2001年 | 2413篇 |
2000年 | 2372篇 |
1999年 | 1822篇 |
1998年 | 911篇 |
1997年 | 850篇 |
1996年 | 851篇 |
1995年 | 763篇 |
1992年 | 1581篇 |
1991年 | 1465篇 |
1990年 | 1444篇 |
1989年 | 1339篇 |
1988年 | 1332篇 |
1987年 | 1254篇 |
1986年 | 1371篇 |
1985年 | 1375篇 |
1984年 | 1176篇 |
1983年 | 1069篇 |
1982年 | 766篇 |
1981年 | 781篇 |
1979年 | 1247篇 |
1978年 | 925篇 |
1976年 | 763篇 |
1975年 | 1035篇 |
1974年 | 1157篇 |
1973年 | 1267篇 |
1972年 | 1032篇 |
1971年 | 1010篇 |
1970年 | 911篇 |
1969年 | 947篇 |
1968年 | 1187篇 |
1967年 | 1069篇 |
1966年 | 977篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
881.
Paul J. Casey 《Memory & cognition》1993,21(4):506-518
Normative data (N=896) collected on solutions to the traditional reasoning problem “Brothers and sisters have I none,/That man’s father is my father’s son” was the platform for a set of experiments to investigate the roles of problem structure, subject strategy, and working memory in error making in a class of verbal problems. The normative data revealed that the modal, but incorrect response to the brothers and sisters problem was “himself,” whereas the correct response of “son” was given by only 17% of subjects for the traditional version above, rising to 40% for a reordered novel version. This problem’s structure, identified as adouble-modifier structure, was found to produce similar response patterns across a range of verbal problems. Results from (1) syntactical structure manipulations (e.g., “My father’s son is the father of that man”), and (2) efforts to teach subjects to use a linear strategy (a sequence of steps), interpreted within a framework of Just and Carpenter’s (1992) capacity theory of comprehension, suggested that working memory overload varies across within-structure modifications and subjects. Further-more, this overload may be compounded by subjects’ choices of strategy. 相似文献
882.
The theoretical distinction between an articulatory control process and a short-term phonological store was supported in five experiments on immediate serial recall. In Experiment 1, articulatory suppression during the presentation and recall of auditory material abolished the word length effect but not the phonemic similarity effect. In Experiment 2, the two latter effects were found to be independent with auditory presentation. In Experiment 3, the effects of irrelevant speech and word length were found to be independent with visual presentation. In Experiment 4, articulatory suppression during the presentation and recall of auditory material abolished the phonemic similarity effect with a slow presentation rate. Nevertheless, in Experiment 5, articulatory suppression with a conventional presentation rate did not reduce the effect of phonemic similarity, even when a 10-sec interval was interposed between presentation and recall. These results indicate that the encoding, maintenance, and retrieval of spoken material within the phonological store do not depend on a process of articulatory rehearsal. 相似文献
883.
Memory & Cognition - The use of different types of partial temporal information is shown to affect dating accuracy and the distribution of errors in event dating. Several different types of... 相似文献
884.
The study presents a hypothesis on how randomness could be simulated by human subjects. Three sources of deviation from randomness are predicted: (1) the preferred application of overlearned production schemata for producing sequences of digits, (2) a wrong concept of randomness, and (3) the impossibility to monitor for redundancies of higher- than those of first-order. Deviations of random generation of digits produced by healthy subjects, patients with chronic frontal lobe damage, and patients with Parkinson′s disease from random sequences produced by a computer program can be explained by the differential influence of these factors. Whereas incorrect concepts of randomness and limits on monitoring capacity distinguished all sequences produced by humans from actual random sequences, persistence on a single production strategy distinguished brain-damaged patients from controls. Random generation of digits appears to be a theoretically transparent and clinically useful test of executive function. 相似文献
885.
Summary A study of movement disorders such as Parkinson's disease and Huntington's disease can provide an indication of the motor functions of the basal ganglia. Basal-ganglia diseases affect voluntary movement and can cause involuntary movement. Deficits are often manifested during the coordination of fine multi-joint movements (e. g., handwriting). The disturbances of motor control (e.g. akinesia, bradykinesia) caused by basal-ganglia disorders are illustrated. Data suggest that the basal ganglia play an important role in the automatic execution of serially ordered complex movements. 相似文献
886.
887.
The processing dominance of global and local levels of visual patterns was studied using two tasks: speeded classification and identification. Stimuli were presented with spatial certainty and controlled eccentricity. The results with both procedures showed global advantage: RTs to global level were faster than those to local level. In the same way, the interference effect was bidirectional between the global and local levels, the amount of interference being larger from the global level to the local one than vice versa. 相似文献
888.
A series of experiments on intersensory facilitation demonstrates that non-informative sound of low to moderate intensity (30/80 dB) facilitates the reaction to a visual stimulus. By manipulating the preprocessing and perceptual stages of the visual signals, it appears that auditory intensity reduces choice reaction time independently from the positive influence of the intensity and duration of the visual imperative signal, but interacts with the effect of stimulus degradation. Degraded stimuli take more profit of the sound than intact stimuli. Besides a short-term activation effect, originated by accessories of the auditory modality, on the motor adjustment stage (cf. Sanders 1983), the results suggest that the accessory influences the stage of feature extraction. 相似文献
889.
Previous research on homeless adolescents has largely ignored the distinction between those who have left home on their own volition (runaways), and those who have been forced to leave (throwaways). Fifty-two homeless adolescents in Brisbane, Australia, were assessed to compare male and female runaways and throwaways for social adjustment and symptomatology. Differences for social adjustment (antisocial tendencies and aggression) and symptomatology (social isolation and depression) were predicted. Results indicated that male runaways were significantly more hostile than male throwaways (p less than .001), and significantly more socially isolated than female runaways (p less than .025). Female throwaways, however, were significantly more hostile than male throwaways (p less than .025) and female runaways (p less than .025). Yet homeless males overall had a significantly stronger urge to act out hostility than homeless females (p less than .025). In addition, female throwaways were significantly more antisocial than male throwaways (p less than .001). There were no significant differences for depression. A theory of inner social control (Hirschi, 1969), postulating absence of bonding in earlier socialization, was supported. 相似文献
890.
Krzysztof Włoch M. D. 《American journal of psychoanalysis》1990,50(4):363-366
Competition is an important force behind evolution in present-day ecological conditions, its intensity varying according to the organisms' expectations vis-à-vis resources available. On the other hand, the role of mutation in the evolutionary process can hardly be underestimated: Leading to the change of the preconsciously functioning archetype, mutation makes it impossible for the ego to realize its image. This is a consequence of the clash between the mutated, preconsciously functioning archetype and the system of ethical and moral norms functioning in the collective superego of a given population group. The type of mutation that results from the accelerated pace of evolution can be viewed as a continuity in the development of an organism's behavior. The preconsciously functioning archetype, resulting from these mutations, contains impulses and predispositions that differ markedly from the impulses and predispositions functioning in the genetically determined "pattern of behavior." In a situation where anxiety results from the inhibition of impulses and dispositions, hostility reactions are likely to occur. In its turn, reactive hostility can induce anxiety, thus creating a reaction cycle. Underlying this mechanism is the mutated, preconsciously functioning archetype, which itself is a result of the development of civilization in our contemporary world. 相似文献