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141.
Megan C. Kirkland Matthew B. Downer Brett J. Holloway Elizabeth M. Wallack Evan J. Lockyer Natasha C. M. Buckle 《Journal of motor behavior》2017,49(5):505-513
Measures of walking such as the timed 25-ft walk test (T25FWT) may not be able to detect subtle impairment in lower limb function among people with multiple sclerosis (MS). We examined bipedal hopping to determine to what extent people with mild (Expanded Disease Severity Scale ≤ 3.5) MS (n = 13) would differ compared to age-, gender-, and education-matched controls (n = 9) and elderly participants (n = 13; ≥ 70 years old). We estimated lower limb power (e.g., hop length, velocity), consistency (e.g., variability of hop length, time), and symmetry (ratio of left to right foot). Participants completed the T25FWT and, after a rest, they then hopped using both feet 4 times along the walkway. We found that although all groups scored below the 6 -s cutoff for T25FWT, the elderly group had significantly shorter hop lengths, more variability, and more asymmetry than the controls. The results of the MS group were not significantly different from the elderly or controls in most measures and most of their values fell between the control and elderly groups. Hop length, but not measures of walking predicted Expanded Disease Severity Scale score (R2 = .38, p = .02). Bipedal hopping is a potentially useful measure of lower limb neuromuscular performance. 相似文献
142.
The transfer of Crel contextual control (same,opposite, less than,more than) through equivalence relations
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William F. Perez Roberta Kovac Yara C. Nico Daniel M. Caro Adriana P. Fidalgo Ila Linares João Henrique de Almeida Júlio C. de Rose 《Journal of the experimental analysis of behavior》2017,108(3):318-334
According to Relational Frame Theory (RFT) Crel denotes a contextual stimulus that controls a particular type of relational response (sameness, opposition, comparative, temporal, hierarchical etc.) in a given situation. Previous studies suggest that contextual functions may be indirectly acquired via transfer of function. The present study investigated the transfer of Crel contextual control through equivalence relations. Experiment 1 evaluated the transfer of Crel contextual functions for relational responses based on sameness and opposition. Experiment 2 extended these findings by evaluating transfer of function using comparative Crel stimuli. Both experiments followed a similar sequence of phases. First, abstract forms were established as Crel stimuli via multiple exemplar training (Phase 1). The contextual cues were then applied to establish arbitrary relations among nonsense words and to test derived relations (Phase 2). After that, equivalence relations involving the original Crel stimuli and other abstract forms were trained and tested (Phase 3). Transfer of function was evaluated by replacing the directly established Crel stimuli with their equivalent stimuli in the former experimental tasks (Phases 1 and 2). Results from both experiments suggest that Crel contextual control may be extended via equivalence relations, allowing other arbitrarily related stimuli to indirectly acquire Crel functions and regulate behavior by evoking appropriate relational responses in the presence of both previously known and novel stimuli. 相似文献
143.
老年执行功能的认知可塑性和神经可塑性 总被引:3,自引:0,他引:3
执行衰退假说认为执行功能的特异性衰退是引起认知年老化的主要原因, 近年来越来越多的研究表明, 老年人的执行功能及其相关脑区(主要为前额叶)存在可塑性, 通过训练执行功能的衰退可得到缓解, 且相关脑区的激活水平、脑容量或神经递质都可发生改变; 部分研究还发现执行功能训练对其它认知能力有一定的迁移效应。这些发现对于认知年老化理论的继续探索和认知干预研究的实践应用都具有重要意义。 相似文献
144.
Abstract: We investigated a transfer from an operant experimental situation to a feeding situation in pigeons using real objects as stimuli. Four pigeons were trained in an operant box to categorize familiar edible items as positives and inedible items as negatives with a go/no‐go procedure. Next, two pairs of unfamiliar edible items were added as stimuli. One of the paired stimuli was arbitrarily assigned as positive and the other as negative. We tested the subjects in their home cages to see whether they would feed on the items they were trained to categorize as positives. In three of the six cases in which categorization training was successful, they continued to peck the positive items. This result suggests that the pigeons transfer what they learned in the operant training situation to the feeding situation. 相似文献
145.
Qiong Zhang Cuiping Wang Qianwen Zhao Ling Yang Martin Buschkuehl Susanne M. Jaeggi 《Developmental science》2019,22(2)
Executive function (EF), its importance for scholastic achievement and the question of whether or not EF is malleable, have become a topic of intense interest. Education or schooling is often seen as effective approaches to enhance EF due to the specific school‐related requirements as compared to kindergarten or pre‐school. However, no study to date has investigated whether targeted training focusing on those domains might be comparable with regular schooling in improving EF and fluid intelligence (Gf). The aim of the present study was to replicate and extend the previously demonstrated schooling effects on EF by using a school‐cutoff design, and to further investigate whether a theoretically motivated intervention targeting specific EF, i.e., working memory (WM) or inhibitory control (IC), could achieve comparable effects with schooling in both, WM and IC, as well as Gf. 91 6‐year‐old kindergarteners and first‐graders with similar chronological age participated the study. We compared the performance of a first‐grade schooling group with that of two kindergarten training groups as well as a business‐as‐usual kindergarten control group. Participants were assessed in WM, IC and Gf at baseline, immediately after the intervention (posttest), as well as 3 months after training completion (follow‐up). The results showed that the schooling group indeed outperformed the kindergarten groups at baseline in several cognitive tasks. Furthermore, both the WM and IC training showed pronounced gains in the trained tasks, as well as varying degrees of improvement in non‐trained outcome measures. Most importantly, both training groups achieved comparable performance with the schooling group, which was especially apparent in Gf at follow‐up. Our findings provide further evidence for the malleability of EF demonstrating that both, long‐term and short‐term interventions can facilitate the acquisition of those important skills, and as such, our work has important implications for educational practice. 相似文献
146.
《Psychologie du Travail et des Organisations》2008,14(4):295-310
The study proposes us to define and to treat the social questions that the musculoskeletal disorders suppose. Indeed, an optimal prevention is articulated around the two poles of musculoskeletal disorders factors of risk, which are the biomechanics and psychosocial factors of risk. The aim of this article is also to create a collective reaction for mobilise every one which are concerned by this subject. The musculoskeletal disorders are one of the first causes of compensation working disease. The factors of risk in their occurred are mainly the repetitivite gesture, the implementation of the muscular force, the extreme articular amplitudes and also, but in a less proportion, the psychological stress felt by a person during his working time. All these elements will be developing in this study. 相似文献
147.
Learning from explaining: does it matter if mom is listening? 总被引:1,自引:0,他引:1
The goal of the current study was to examine whether explaining to another person improves learning and transfer. In the study, 4- and 5-year-olds (N=54) solved multiple classification problems, received accuracy feedback, and were prompted to explain the correct solutions to their moms, to explain the correct solutions to themselves, or to repeat the solutions. Generating explanations (to selves or moms) improved problem-solving accuracy at posttest, and explaining to mom led to the greatest problem-solving transfer. The study indicates that explanation prompts can facilitate transfer in children as young as 5 years and reveals that it matters if mom is listening. 相似文献
148.
Erik De Corte 《Current directions in psychological science》2003,12(4):142-146
Historically, the notion of transfer has been very controversial, conceptually as well as empirically. Therefore, there is an obvious need for further inquiry aimed at a better understanding of the processes underlying transfer. Taking into account the recent literature, this article defines transfer as the broad, productive, and supported use of acquired knowledge, skills, and motivations in new contexts and learning tasks. As an illustration, an intervention study is briefly discussed. This study shows the possibility of designing a powerful learning environment that yields transfer effects in accordance with this reconceptualized perspective on transfer. 相似文献
149.
探讨在小学三年级句群教学条件下,样例的不同呈现方式与练习方法对形成有关图式及其技能的影响。同时,考察陈述性知识、认知技能(一般程序性知识)和策略相互间的关系及对被试任务操作的影响效果。研究结果表明:(1)在实验班中,同时呈现两个以上样例并加以归纳,再循序渐进地进行变式练习,有利于图式与技能形成以及类比迁移,且中差生获益较大;(2)在被试的任务操作中,陈述性知识主效应非常显著,其次为认知技能,再次为策略,陈述性知识和认知技能之间存在显著交互作用。 相似文献
150.
表面内容不同方面相似性对样例迁移的影响 总被引:2,自引:2,他引:0
应用题表面内容分离为表面概貌和对象对应后,还可以进行再分解。本实验将表面概貌分解为具体属性和问题形式,将对象对应分解表述顺序对应和具体对象对应,研究结果表明,表面内容不同方面的相似性对原理运用有不同的影响。 相似文献