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931.
The authors argue that human sequential learning is often but not always characterized by a shift from stimulus- to plan-based action control. To diagnose this shift, they manipulated the frequency of 1st-order transitions in a repeated manual left-right sequence, assuming that performance is sensitive to frequency-induced biases under stimulus- but not plan-based control. Indeed, frequency biases tended to disappear with practice, but only for explicit learners. This tendency was facilitated by visual-verbal target stimuli, response-contingent sounds, and intentional instructions and hampered by auditory (but not visual) noise. Findings are interpreted within an event-coding model of action control, which holds that plans for sequences of discrete actions are coded phonetically, integrating order and relative timing. The model distinguishes between plan acquisition, linked to explicit knowledge, and plan execution, linked to the action control mode. 相似文献
932.
Joan M. Ostrove 《Sex roles》2007,57(5-6):463-465
933.
Performing under pressure: the effects of physiological arousal, cognitive anxiety, and gaze control in biathlon 总被引:1,自引:0,他引:1
The authors provide evidence that choking under pressure is associated with changes in visual attention. Ten elite biathlon shooters were tested under separate low-pressure (LP) and high-pressure (HP) conditions after exercising on a cycle ergometer at individually prescribed power output (PO) levels of 55%, 70%, 85%, and 100% of their maximum oxygen uptake. The authors determined difference scores by subtracting each athlete's score in the LP condition from his or her score in the HP condition for heart rate (d-HR), rate of perceived exertion (d-RPE), cognitive anxiety (d-CA), and cognitive worry (d-CW), and final fixation on the target or quiet eye gaze (d-QE). Using regression analysis, the authors determined predictors of accuracy for each HP PO level. At PO 55%, the authors found 3 predictors (d-HR, d-RPE, d-QE) that accounted for .62 of the adjusted R2 variance. Accuracy was higher when d-QE was lower and d-RPE and d-HR were higher than the values found in the LP condition. At PO 100%, however, an increase in d-QE and d-RPE accounted for .58 of the adjusted R2 variance. Accuracy was dependent on an increase in external focus (positive d-QE) independently of heart rate. At the highest PO level, directing visual attention externally to critical task information appeared to insulate the athletes from choking under HP. 相似文献
934.
During the late 1990s, the psychology department of Indiana University-Purdue University Indianapolis made investments in its undergraduate advising program in terms of additional professional personnel, a new orientation course, an experimental intrusive advising track, innovative peer activities, and expanded physical facilities. Against this backdrop of innovations, from 1995 to 2001 an exit survey of graduating seniors (N=311) showed improved evaluations of departmental counseling services. Ratings of the obtainability of advising on courses and the quality of course and career advising all showed significant upward shifts over the seven years of study. Regarding a specific innovation, students who completed a 1-hr. orientation course gave higher mean counseling ratings than those not enrolled. 相似文献
935.
Joseph L Verheijde Mohamed Y Rady Joan McGregor 《Philosophy, ethics, and humanities in medicine : PEHM》2007,2(1):8-9
Organ donation after cardiac or circulatory death (DCD) has been introduced to increase the supply of transplantable organs.
In this paper, we argue that the recovery of viable organs useful for transplantation in DCD is not compatible with the dead
donor rule and we explain the consequential ethical and legal ramifications. We also outline serious deficiencies in the current
consent process for DCD with respect to disclosure of necessary elements for voluntary informed decision making and respect
for the donor's autonomy. We compare two alternative proposals for increasing organ donation consent in society: presumed
consent and mandated choice. We conclude that proceeding with the recovery of transplantable organs from decedents requires
a paradigm change in the ethics of organ donation. The paradigm change to ensure the legitimacy of DCD practice must include:
(1) societal agreement on abandonment of the dead donor rule, (2) legislative revisions reflecting abandonment of the dead
donor rule, and (3) requirement of mandated choice to facilitate individual participation in organ donation and to ensure
that decisions to participate are made in compliance with the societal values of respect for autonomy and self-determination. 相似文献
936.
937.
Margaret Anne Defeyter Riccardo Russo Pamela Louise McPartlin 《Cognitive development》2009,24(3):265-273
Items studied as pictures are better remembered than items studied as words even when test items are presented as words. The present study examined the development of this picture superiority effect in recognition memory. Four groups ranging in age from 7 to 20 years participated. They studied words and pictures, with test stimuli always presented as words, and time to respond to test stimuli was manipulated. The picture superiority effect showed a clear developmental trend. In the condition in which participants had ample response time, a significant picture superiority effect appeared in all but the youngest group. With short response time, a significant picture superiority effect appeared only among 11- and 20-year-old groups, while a significant reverse of the picture superiority effect was detected in the youngest group. These results were interpreted as suggesting that different memory processes (familiarity and recollection) contribute differently to the picture superiority effect at different stages of development. 相似文献
938.
Phillip W. Braddy Adam W. Meade Joan J. Michael John W. Fleenor 《International Journal of Selection & Assessment》2009,17(1):19-34
This study examined the effects of four ‘careers’ website content features (pictures, testimonials, organizational policies, and awards won) on viewers' perceptions of nine organizational culture attributes. Eight of these culture attributes were more strongly conveyed by culture‐specific website content features than by culture‐neutral website content features. This study also found support for a partial mediated‐moderation model. This model illustrated that participants with weak culture preferences formed less favorable person–organization (P–O) fit perceptions as they perceived an organization to more strongly convey the culture attribute under investigation. Conversely, participants with strong culture preferences formed more favorable P–O fit perceptions as they perceived an organization to more strongly portray the culture attribute in question. Respondents with stronger P–O fit perceptions in turn reported stronger organizational attraction. 相似文献
939.
940.
Sarah Frances Brosnan Joan B. Silk Joseph Henrich Mary Catherine Mareno Susan P. Lambeth Steven J. Schapiro 《Animal cognition》2009,12(4):587-597
Chimpanzees provide help to unrelated individuals in a broad range of situations. The pattern of helping within pairs suggests
that contingent reciprocity may have been an important mechanism in the evolution of altruism in chimpanzees. However, correlational
analyses of the cumulative pattern of interactions over time do not demonstrate that helping is contingent upon previous acts
of altruism, as required by the theory of reciprocal altruism. Experimental studies provide a controlled approach to examine
the importance of contingency in helping interactions. In this study, we evaluated whether chimpanzees would be more likely
to provide food to a social partner from their home group if their partner had previously provided food for them. The chimpanzees
manipulated a barpull apparatus in which actors could deliver rewards either to themselves and their partners or only to themselves.
Our findings indicate that the chimpanzees’ responses were not consistently influenced by the behavior of their partners in
previous rounds. Only one of the 11 dyads that we tested demonstrated positive reciprocity. We conclude that contingent reciprocity
does not spontaneously arise in experimental settings, despite the fact that patterns of behavior in the field indicate that
individuals cooperate preferentially with reciprocating partners. 相似文献