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731.
Richard Bradley 《Topoi》2011,30(1):39-45
Case-based reasoning is a familiar method of evaluating sentences. But when applied to conditionals, it seems to lead to implausible
conclusions. In this paper I argue that the problem arises from equating the probability of a conditional sentence on the
evidential supposition of some condition with the conditional probability of the former, given the latter. 相似文献
732.
Managing a new collaborative entity in business organizations: understanding organizational communities of practice effectiveness 总被引:1,自引:0,他引:1
Kirkman BL Mathieu JE Cordery JL Rosen B Kukenberger M 《The Journal of applied psychology》2011,96(6):1234-1245
Companies worldwide are turning to organizational communities of practice (OCoPs) as vehicles to generate learning and enhance organizational performance. OCoPs are defined as groups of employees who share a concern, a set of problems, or a passion about a topic and who strengthen their knowledge and expertise by interacting on a consistent basis. To date, OCoP research has drawn almost exclusively from the community of practice (CoP) literature, even though the organizational form of CoPs shares attributes of traditional CoPs and of organizational teams. Drawing on Lave and Wenger's (1991) original theory of legitimate peripheral participation, we integrate theory and research from CoPs and organizational teams to develop and empirically examine a model of OCoP effectiveness that includes constructs such as leadership, empowerment, the structure of tasks, and OCoP relevance to organizational effectiveness. Using data from 32 OCoPs in a U.S.-based multinational mining and minerals processing firm, we found that external community leaders play an important role in enhancing OCoP empowerment, particularly to the extent that task interdependence is high. Empowerment, in turn, was positively related to OCoP effectiveness. We also found that OCoPs designated as "core" by the organization (e.g., working on critical issues) were more effective than those that were noncore. Task interdependence also was positively related to OCoP effectiveness. We provide scholars and practitioners with insights on how to effectively manage OCoPs in today's organizations. 相似文献
733.
Accuracy rates with polygraphs using concealed information tests (CITs) depend on memory for crime details. Some participants read instructions on murdering a dummy victim that specified exact crime details asked on the subsequent CIT. Others read instructions not stating details, but still requiring interaction with the exact same details for the crime. For example, the murder weapon was under four heavy boxes. Instructions stated either "... remove the 4 boxes ..." or "... remove the boxes ..." Thus, each group removed four boxes, but only one group was primed with the number "4" beforehand. In addition, the victim unexpectedly shouted at some participants during the crime. An innocent group was not exposed to either manipulation. Memory, detection scores, and detection rates were lower for guilty participants not primed with details. Sound affected detection scores but not memory, and there was no interaction between the two factors. Information tests are limited by how crime information is received. 相似文献
734.
Sturz BR Cooke SP Bodily KD 《Journal of experimental psychology. Animal behavior processes》2011,37(3):368-374
Vectors are mathematical representations of distance and direction information that take the form of line segments where length represents distance and orientation in space represents direction. Vector-based models have proven beneficial in understanding the spatial behavior of a variety of species in tasks that require landmark-based navigation via vector addition and vector averaging to determine a location. Extant research regarding vector-based representational and computational accounts of landmark-based navigation has involved tasks that required solving for one unknown (i.e., a location). Using a novel landmark-based navigation task, we provide evidence consistent with a form of vector algebra that involves solving two simultaneous equations with two unknowns in order to determine a location in space. Results extend vector-based accounts of landmark-based navigation and provide a novel methodological approach to the testing of mobile organisms. 相似文献
735.
736.
Biggs AT Kreager RD Gibson BS Villano M Crowell CR 《Journal of experimental psychology. Human perception and performance》2012,38(2):531-541
Emotion appears to have a substantial impact on a wide variety of attentional functions. However, stimuli that elicit affective responses also tend to be meaningful. Here we attempted to disentangle the effects of meaning from the effects of affect on attentional capture by irrelevant distractors. Experiment 1 used a previously unfamiliar distractor stimulus, and manipulated the amount of knowledge provided to observers about the distractor. The results suggested that increases in meaning can reduce attentional capture. Experiments 2 and 3 used both familiar and unfamiliar symbols (baseball logos and flags, respectively) as distractors. Critically, of the two familiar symbols, one was rated as affective-positive and the other was rated as affective-negative. As in Experiment 1, the results showed that unfamiliar distractors can capture attention. In addition, the results also suggested that the two affective distractors captured attention (so long as they were sufficiently intense). This finding suggests that while increased knowledge can reduce capture, affect can restore an item's ability to capture attention. Finally, the results of Experiment 4 showed that observers were slower to disengage from a negative item than from a positive item. This evidence emphasizes the differential roles of semantic knowledge versus affect on attentional capture. 相似文献
737.
Bradley S. Gibson William G. Kronenberger Dawn M. Gondoli Ann C. Johnson Rebecca A. Morrissey Christine M. Steeger 《Journal of applied research in memory and cognition》2012,1(3):179-184
There has been growing interest in using adaptive training interventions such as Cogmed-RM to increase the capacity of working memory (WM), but this intervention may not be optimally designed. For instance, Cogmed-RM can target the primary memory (PM) component of WM capacity, but not the secondary memory (SM) component. The present study hypothesized that Cogmed-RM does not target SM capacity because the simple span exercises it uses may not cause a sufficient amount of information to be lost from PM during training. To investigate, we randomly assigned participants to either a standard (simple span; N = 31) or a modified (complex span; N = 30) training condition. The main findings showed that SM capacity did not improve, even in the modified training condition. Hence, the potency of span-based WM interventions cannot be increased simply by converting simple span exercises into complex span exercises. 相似文献
738.
Although there is evidence that praise of different types (i.e., generic vs. nongeneric) influences motivation, it is unclear how this occurs. Generic praise (e.g., ??You are smart??) conveys that a child possesses a trait responsible for their performance, whereas nongeneric praise (e.g., ??You worked hard??) conveys that performance is effort-based. Because praise conveys the basis for success, praise may change the interpretation and salience of errors. Specifically, generic praise may highlight the threatening nature of error (i.e., the child does not possess this trait). Because attention is drawn to threats in the environment, we expected generic praise to increase attention to error. We used eyetracking to measure implicit responses to errors (i.e., visual attention: fixation counts and durations) in order to determine the relation between visual attention and verbal reports of motivation (persistence and self-evaluations) in 30 four- to seven-year-old children. Children first saw pictures attributed to them, for which they received either generic or nongeneric praise. The children then saw pictures attributed to them that contained errors??that is, missing features. As a pretest and posttest, the children saw pictures that were ??drawn by other children,?? half of which contained errors. The results indicated that children who received generic praise (??you are a good drawer??) produced more and longer fixations on errors, both their ??own?? and on ??other children??s,?? than did children who received nongeneric praise (??you did a good job drawing??). More fixations on errors were related to lower persistence and lower self-evaluations. These results suggest that generic praise increases attention to errors because error threatens the possession of a positive trait. 相似文献
739.
Trait vs. nontrait conceptualizations of intrinsic/extrinsic motivational orientation 总被引:1,自引:0,他引:1
The present study questioned whether intrinsic vs. extrinsic motivation should be conceptualized as a trait among elementary school students. Previous instruments employing question formats that pit an intrinsic orientation against an extrinsic orientation typically result in normal distributions around the midpoint of the scale. Such a pattern could only result from a majority of children endorsing both intrinsic and extrinsic items. In the present study we investigated the hypothesis that such children may be intrinsically motivated in some school subjects but extrinsically motivated in others. Questions designed to assess motivational orientation in each of four academic subjects (math, social studies, English, and science) revealed three types of students: (a) those that were intrinsic in some subjects but extrinsic in others, (b) those that were intrinsic in all school subjects, and (c) those that were extrinsic in all school subjects. It was concluded that for the first group, motivational orientation does not function as a trait, but rather is specific to the academic content. However, for the second and third groups, motivational orientation does appear to be trait-like since children consistently report the same orientation across academic subjects. A similar analysis was applied to consistency vs. change over time where three groups were also identified. Discussion focused on the larger issues involving trait- vs. situation-specific approaches. 相似文献
740.