全文获取类型
收费全文 | 795篇 |
免费 | 39篇 |
国内免费 | 1篇 |
专业分类
835篇 |
出版年
2023年 | 5篇 |
2022年 | 5篇 |
2021年 | 7篇 |
2020年 | 14篇 |
2019年 | 13篇 |
2018年 | 28篇 |
2017年 | 39篇 |
2016年 | 26篇 |
2015年 | 22篇 |
2014年 | 20篇 |
2013年 | 96篇 |
2012年 | 38篇 |
2011年 | 32篇 |
2010年 | 19篇 |
2009年 | 24篇 |
2008年 | 38篇 |
2007年 | 36篇 |
2006年 | 29篇 |
2005年 | 26篇 |
2004年 | 24篇 |
2003年 | 32篇 |
2002年 | 32篇 |
2001年 | 12篇 |
2000年 | 14篇 |
1999年 | 15篇 |
1998年 | 12篇 |
1997年 | 10篇 |
1996年 | 15篇 |
1995年 | 10篇 |
1994年 | 8篇 |
1993年 | 5篇 |
1992年 | 5篇 |
1991年 | 8篇 |
1990年 | 7篇 |
1989年 | 5篇 |
1988年 | 3篇 |
1987年 | 5篇 |
1986年 | 9篇 |
1985年 | 11篇 |
1984年 | 6篇 |
1983年 | 12篇 |
1982年 | 8篇 |
1981年 | 3篇 |
1980年 | 3篇 |
1979年 | 9篇 |
1978年 | 7篇 |
1977年 | 3篇 |
1976年 | 3篇 |
1975年 | 4篇 |
1974年 | 5篇 |
排序方式: 共有835条查询结果,搜索用时 0 毫秒
161.
We suggest that the core features of borderline personality disorder (BPD) are the intense inner pain commonly reported by borderline patients and the awkward means they use to manage and express this pain. In this model, the pain has both affective and cognitive components. The awkward means of managing and expressing this pain are behavioral and interpersonal in nature. The etiology of these core features of BPD seems to lie in the interaction of a kindling event or events, which can be traumatic or normative in nature, and a vulnerable or hyperbolic temperament. The treatment and nosological implications of this model are discussed. 相似文献
162.
Evidence for infants' internal working models of attachment 总被引:2,自引:0,他引:2
163.
University of Illinois at Urbana-Champaign, Urbana, Illinois Much of our learning comes from interacting with objects. Two
experiments investigated whether or not arbitrary actions used during category learning with objects might be incorporated
into object representations and influence later recognition judgments. In a virtual-reality chamber, participants used distinct
arm movements to make different classification responses. During a recognition test phase, these same objects required arm
movements that were consistent or inconsistent with the classification movement. In both experiments, consistent movements
were facilitated relative to inconsistent movements, suggesting that arbitrary action information is incorporated into the
representations. 相似文献
164.
Enriching the environment of alphaCaMKIIT286A mutant mice reveals that LTD occurs in memory processing but must be subsequently reversed by LTP 下载免费PDF全文
Parsley SL Pilgram SM Soto F Giese KP Edwards FA 《Learning & memory (Cold Spring Harbor, N.Y.)》2007,14(1-2):75-83
alphaCaMKII(T286A) mutant mice lack long-term potentiation (LTP) in the hippocampal CA1 region and are impaired in spatial learning. In situ hybridization confirms that the mutant mice show the same developmental expression of alphaCaMKII as their wild-type littermates. A simple hypothesis would suggest that if LTP is a substrate for learning, then enriching the environment should cause learning-dependent changes in wild-type mice that have LTP. Such changes would not be seen in LTP-deficient alphaCaMKII(T286A) mutants. Excitatory synaptic currents in CA1 neurons, recorded with patch clamp in brain slices, revealed that enrichment induces an increase in glutamate release probability and a decreased miniature current amplitude. Confocal microscopy also showed dendritic spine density to be reduced. However, contrary to the hypothesis above, these enrichment-induced changes occur only in the mutant mice and are not detectable in wild-type littermates. We suggest that enrichment induces alphaCaMKII-independent changes in both wild-type and mutant mice. Such changes may be subsequently reversed in wild-type animals via alphaCaMKII-dependent mechanisms, such as LTP. Reversal of plasticity has long been hypothesized to be essential for the hippocampus to maintain its role in memory processing. The inability to reverse plasticity in alphaCaMKII(T286A) mutant mice would then result in impairment of spatial learning. 相似文献
165.
Fears and related anxieties across three age groups of Mexican American and White children with disabilities 总被引:1,自引:0,他引:1
The authors compared levels and types of fears and anxieties in a sample of Mexican American children and adolescents with disabilities to a group of White children and adolescents with similar disabilities. Students (N = 238), parents, and teachers completed the Fear Survey Schedule for Children-Revised (T. H. Ollendick, 1983) and the Revised Children's Manifest Anxiety Scale (C. R. Reynolds & B. O. Richmond, 1997). Levels of fear and anxiety were similar for both groups of students and were similarly underestimated by teachers. The groups of students differed in terms of their specific fears and the degree to which their parents recognized their children's fears (Mexican American parents were less accurate at rating their children's fears). Mexican American girls aged 7-10 and 11-13 years and White girls aged 14-18 years reported the highest scores; White boys aged 14-18 years reported the lowest scores. 相似文献
166.
Sensitization and habituation regulate reinforcer effectiveness 总被引:1,自引:1,他引:0
We argue that sensitization and habituation occur to the sensory properties of reinforcers when those reinforcers are presented repeatedly or for a prolonged time. Sensitization increases, and habituation decreases, the ability of a reinforcer to control behavior. Supporting this argument, the rate of operant responding changes systematically within experimental sessions even when the programmed rate of reinforcement is held constant across the session. These within-session changes in operant responding are produced by repeated delivery of the reinforcer, and their empirical characteristics correspond to the characteristics of behavior undergoing sensitization and habituation. Two characteristics of habituation (dishabituation, stimulus specificity) are particularly useful in separating habituation from alternative explanations. Arguing that habituation occurs to reinforcers expands the domain of habituation. The argument implies that habituation occurs to biologically important, not just to neutral, stimuli. The argument also implies that habituation may be observed in “voluntary” (operant), not just in reflexive, behavior. Expanding the domain of habituation has important implications for understanding operant and classical conditioning. Habituation may also contribute to the regulation of motivated behaviors. Habituation provides a more accurate and a less cumbersome explanation for motivated behaviors than homeostasis. Habituation also has some surprising, and easily testable, implications for the control of motivated behaviors. 相似文献
167.
168.
In searching for a target letter while reading, participants make more omissions when the target letter is embedded in frequent function words than when it is embedded in less frequent content words. According to the guidance-organization (GO) model, this occurs because high-frequency function words are processed faster than low-frequency content words, leaving less time available for letter processing. We tested this hypothesis in three experiments by increasing word-processing speed through text repetition, which should translate into higher omission rates. Participants either read the text and searched for the target letter once or read the text three times and searched for a target letter on all readings or the final reading only. In all the experiments in which participants could not anticipate the target letter to be used, results revealed the presence of a large missing-letter effect that was unaffected by familiarity with the text. In addition, when participants knew from the start the target letter to be used on the final reading, the missing-letter effect was eliminated. Repeated search of the same text for different targets increased omissions equally for function words and content words, but this finding was present even when a new text was used, suggesting that repetition of the search task, rather than familiarity with the text, was responsible. 相似文献
169.
170.
This study was designed to evaluate the influence of phonological structure on the performance of French beginning readers. Because the French phonological system has a clear syllabic structure novice readers use phonological units such as syllables when silently reading words. Therefore, the phonological structure of items was expected to be a significant determinant of performance. The results demonstrate the young readers' tendency to simplify polysyllabic words by reducing them to open‐ended syllables. The first experiment showed that nasal vowels involve a delay in phonological processing and the second experiment focused on the difficulties in processing consonant clusters. 相似文献