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851.
The place at which the eyes first fixate in a word during continuous reading, called the preferred landing position (PLP), is usually located halfway between the beginning and the middle of the word. To propose a mechanism that might account for the off-center location of the PLP, six eye movement experiments were conducted using a lexical decision task (Experiment 1) and a stimulus bisection task (Experiments 2-6). The type of stimulus--linguistic (words and nonwords) versus nonlinguistic (strings of hashes, dotted lines, and solid lines)--and the stimulus presentation side (left vs. right) were manipulated. The results showed that (1) stimulus discreteness versus continuousness is an important factor in saccade computation and (2) PLP asymmetry can be explained in terms of attentional and/or oculomotor processes.  相似文献   
852.
Recent models of lexical processing suggest that written spelling partly depends upon the semantic system. According to these models, a deterioration in word meanings would necessarily lead to a spelling impairment, especially for low-frequency and orthographically irregular words. We report a case study of a patient (MK) with semantic dementia who presents impairments in knowledge of word meanings and surface dysgraphia. By specifically identifying concepts that are still known or that are partially or completely deteriorated, we show that the patient's spelling deficit is highly correlated with word comprehension. These data confirm that surface dysgraphia is directly linked to the breakdown in semantic memory.  相似文献   
853.
Aged intact and young hippocampal-lesioned rats show similar deficits on the spatial water maze. However, this does not necessitate that the source of these deficits in the aged animals is due to hippocampal damage. These water maze deficits may arise from other aging factors such as changes in thermoregulation, muscle fatigue, swim ability, and response to stress. Consequently, it is imperative to examine the performance of aged rats on a comparable nonhippocampal version of this task. Past attempts to develop a hippocampus-independent version of the water maze were confounded because these tasks were easier (i.e., the rats spent much less time swimming in the water) than the spatial versions of the task. The current study examined performance on a hippocampus-independent task comparable in difficulty to the spatial water one. Middle-aged (16-m) and old (25-m) male F344 rats were given sham or dorsal hippocampus lesions and tested on both a spatial and a nonspatial water maze. The middle-aged rats with hippocampal lesions were impaired on the spatial task but not on the nonspatial task. Conversely, aged animals showed a similar impairment on both types of water maze tasks. Additionally, hippocampal lesions exacerbated the age-related impairment on both tasks. These findings indicate that caution must be used when interpreting the results of water maze tasks for aged animals.  相似文献   
854.
Spatial working memory (SWM) is known to be impaired in children with ADHD-CT, whether anxiety is present or not. Yet, it remains unclear whether anxiety disorders add to the SWM impairments evident in ADHD-CT and whether these findings extend into adolescents with ADHD-CT and anxiety. Further, it is not yet known whether children and adolescents with carefully defined anxiety disorders alone, demonstrate SWM deficits. This study explored the association of SWM and its strategy and spatial span components in carefully defined children and adolescents (age 6–16 years) with ADHD-CT alone (N?=?163; 14 % female), ADHD-CT and anxiety (N?=?243; 23 % female), anxiety disorders alone (N?=?69; 25 % female) compared to age- and gender-matched healthy control participants (N?=?116; 19 % female). The relationship between SWM and its strategy and span components and core ADHD-CT symptoms and anxiety symptoms were also examined. There was no evidence of an additive effect of ADHD and anxiety on SWM, strategy and spatial span deficits. But, anxiety disorders alone were associated with impaired SWM and span performance compared to healthy control participants. In contrast, strategy did not differ between children and adolescents with anxiety disorders alone and healthy control participants, suggesting that with anxiety span is the most affected component. Further, these findings were age-independent. This study concurs with and extends current influential models about the cognitive effects of anxiety on performance in the setting of ADHD-CT. Clinical implications and future research directions are discussed.  相似文献   
855.
This paper presents an analysis of the rowing parameters of differently skilled rowers. The study focuses on technique dependency on stroke rate. Five elite, five junior and five non-rowers participated, and the biomechanics of rowing on an ergometer was analyzed at stroke rates of 20, 26 and 34 str/min. The results show that elite rowers use a similar, consistent rowing technique at all stroke rates, the technique of junior rowers follows similar principles, while the technique of non-rowers varies. Elite rowers’ stroke length, handle motion and body posture do not change with stroke rate while the ratio of stroke phases, maximum forces, stroke work and joint loadings are constant at the same stroke rate but dependent on stroke rate. Junior rowers with stroke rate change also the stroke length. In non-rowers the differences can be observed in the handle motion and body posture during the stroke, their stroke length changes with stroke rate while the ratio of stroke phases stays constant. Although different movement execution is evident and variable with stroke rate, non-rowers demonstrate a consistent pattern at the same stroke rate. On the basis of the results, the crucial parameters that differentiate elite, junior, and non-rowers are identified.  相似文献   
856.

First and second grade public school teachers were trained through interactive video-conferencing to implement Language Enrichment, an Orton-Gillingham-based literacy instruction. The effectiveness of the linguistically informed training was demonstrated by documenting the longitudinal third grade reading comprehension achievement of their students. Student achievement was measured on the state-mandated achievement test, Texas Assessment of Academic Skills (TAAS). Hierarchical linear modeling (HLM) showed that students whose teachers were trained in Language Enrichment instruction had higher third grade reading comprehension achievement than students whose teachers were not trained. Additionally, a significant effect of the length of Language Enrichment teaching experience of the second grade teacher on third grade reading comprehension was found. Earlier occurring second grade teacher training was associated with higher reading scores than later training. Based on these findings it is suggested that teachers who have content-rich knowledge known to support literacy acquisition can provide reading instruction that results in a level of reading comprehension that is significantly higher than that resulting from teachers who do not have a well-developed domain of knowledge concerning the reading process. This study also indicates that teacher competence was enhanced through practice because student reading achievement of the more-experienced Language Enrichment teachers was higher than that of the less-experienced Language Enrichment teachers.  相似文献   
857.
This article reports the outcomes of the first 3 years of an ongoing participatory action research (PAR) project that brought together literacy and content-area teacher educators. The purpose of our collaboration was two-fold: (a) to develop shared understandings or theories related to literacy and the place of literacy instruction in content-area classrooms, and (b) to make changes to our work with preservice teachers in order to prepare them to support adolescents’ content learning and discipline-specific literacy development. The findings reveal that the collaborative activities allowed participants to embrace broad notions of text and literacy that are useful in making sense of disciplinary aims and pedagogy. Furthermore, as teacher educators came to shift their thinking about literacy and disciplinary learning and teaching, their work with preservice teachers changed. Implications for future collaborative activities to promote content-area literacy are discussed.  相似文献   
858.
Previous research has suggested that we tend to show impaired memory for self-threatening information, an effect known as mnemic neglect. Mnemic neglect is believed to be due to shallow processing or inhibition of self-threatening information. Mnemic neglect, however, could also be an example of experiential avoidance and mindfulness training has been demonstrated to counteract experiential avoidance. The current study was designed to negate experiential avoidance on a memory task via mindfulness training and attempt to increase recall of self-threatening information. Participants were exposed to a short intervention, either mindfulness or unfocused attention, before being instructed to read and later recall self-referent behaviors. The findings indicated that recall of self-threatening and other self-referent information was increased following the mindfulness but not unfocused attention intervention. The utility of mindfulness as a strategy for negating the experiential avoidance normally associated with self-threatening information and increasing memory performance are discussed.  相似文献   
859.
One goal of this exploratory study was to describe the experiences of 41 wives engaged in a congregationally based educational program promoting the discussion of advance directives (ADs). Other goals were to explore whether marital commitment was an antecedent for engaging in AD discussions, as well as whether it was positively associated with wives' increased trust that their husbands would carry out their AD preferences. Eighty percent of the wives discussed ADs with their husbands, and 44% revised/signed an AD. Slightly over half of the couples discussed ADs for 1 hour or less.There was marginal support for the hypothesis that there would be a positive association between wives' discussing ADs with their husbands and marital commitment. There was strong support for the hypothesis that wives' level of commitment would be positively associated with their trust that their husbands would carry out their AD preferences.  相似文献   
860.
Jovan Babić 《Philosophia》2013,41(4):1007-1016
The paper has three parts. The first is a discussion of the values as goals and means. This is a known Moorean distinction between intrinsic and instrumental values, with one other Moorean item - the doctrine of value wholes. According to this doctrine the value wholes are not simply a summation of their parts, which implies a possibility that two evils might be better than one (e. g. crime + punishment, two evils, are better than either one of them taken separately). In this first part I will discuss peace as an end value, and war as a means value. The second part dicsusses briefly the issue of sincerity. The third, last and for me the most important part of the paper explores the issue of moral integrity in pacifism: could a pacifist preserve the integrity of the attacker, or, for that matter her own integrity, or must she destroy anyone’s integrity and dehumanize the attacker and also herself?  相似文献   
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