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Infants can see someone pointing to one of two buckets and infer that the toy they are seeking is hidden inside. Great apes do not succeed in this task, but, surprisingly, domestic dogs do. However, whether children and dogs understand these communicative acts in the same way is not yet known. To test this possibility, an experimenter did not point, look, or extend any part of her body towards either bucket, but instead lifted and shook one via a centrally pulled rope. She did this either intentionally or accidentally, and did or did not address her act to the subject using ostensive cues. Young 2‐year‐old children but not dogs understood the experimenter's act in intentional conditions. While ostensive pulling of the rope made no difference to children's success, it actually hindered dogs' performance. We conclude that while human children may be capable of inferring communicative intent from a wide variety actions, so long as these actions are performed intentionally, dogs are likely to be less flexible in this respect. Their understanding of communicative intention may be more dependent upon bodily markers of communicative intent, including gaze, orientation, extended limbs, and vocalizations. This may be because humans have come under selective pressure to develop skills for communicating with absent interlocutors – where bodily co‐presence is not possible.  相似文献   
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Alastair Logan has argued for the existence of a post-baptismalanointing with ointment in parts of the ‘great church’of second-century Syria and Asia Minor. He has proposed thatthis rite fell into desuetude but found new life in the fourthcentury. Logan's arguments depend especially on Ignatius’Letter to the Ephesians 17.1, the blessing at the end of theCoptic Didache 10.7, and the version of this prayer in ApostolicConstitutions 7.27. However, Logan's evidence lacks convincingcompleteness for three reasons. First, Ignatius’ Letterto the Ephesians says too little about the anointing practisedin communities he judged orthodox to serve as a witness fora post-baptismal ointment rite in these churches. Second, Logan'sargument that the prayer at the end of the Coptic Didache 10.7refers to ointment and is an original part of this documentfails to answer sufficiently too many questions and counter-argumentsfound in the literature. Third, his argument for supposing thatApostolic Constitutions 7.27 proposes a ritual innovation consideredessential by the redactor depends on the misreading of somepassages and on the assertion of divergent interpretations ofthe baptismal ointment in this work which comparison with otherAntiochene sources shows to be unjustified.  相似文献   
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Several studies have found that edible items tend to displace leisure items in multiple-stimulus preference assessments for individuals with developmental disabilities. One recent study (Conine & Vollmer, 2019) included screen-based technology devices in assessments and found that food items were less likely to displace leisure items and in some cases leisure items totally displaced edible items. The purpose of our study was to conduct a replication of Conine and Vollmer in Italy to evaluate cultural differences in food and leisure preferences. Results of our study were similar: For 44% of participants, at least one leisure item ranked above all edible items and leisure items displaced all edible items for 28% of participants. Participants in the present study showed a higher preference for leisure items or toys that were not screen-based technology devices, suggesting there may be cultural variation in the types of leisure items that are preferred.  相似文献   
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Across two studies, we examined the relation between mindsets of health, expectancy‐value, and eating intentions. We also explored if relations are stronger for African Americans compared to White Americans. In Study 1, we conducted a correlational study (N = 158) to examine initial relations among constructs. In Study 2, we employed an experimental design (N = 205), and randomly assigned participants to either a growth mindset or a fixed mindset of health condition. In both studies, we measured participants’ mindsets of health, expectancy‐value beliefs, healthy eating intentions, past eating habits, and demographics. In Study 1, stronger growth mindsets of health predicted healthier eating intentions. Expectancy‐value beliefs, namely, the extent to which individuals value healthy eating habits and expect to be able to manage their eating, mediated this relation. In Study 2, we successfully manipulated mindsets of health and individuals in the growth mindset condition reported healthier eating intentions, compared to those in the fixed mindset condition. Expectancy‐value beliefs again mediated this link. Race only moderated the relation in Study 1, such that effects of growth mindsets on outcomes (i.e., eating intentions and expectancy‐value beliefs) are stronger for African Americans compared to White Americans. Study 1 provided initial evidence of a relationship between stronger growth mindsets of health and healthier beliefs and intentions. Study 2 offered experimental evidence. We discuss theoretical and practical implications.  相似文献   
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Rats retain source memory (memory for the origin of information) over a retention interval of at least 1 week, whereas their spatial working memory (radial maze locations) decays within approximately 1 day. We have argued that different forgetting functions dissociate memory systems. However, the two tasks, in our previous work, used different reward values. The source memory task used multiple pellets of a preferred food flavor (chocolate), whereas the spatial working memory task provided access to a single pellet of standard chow-flavored food at each location. Thus, according to the reward-value hypothesis, enhanced performance in the source memory task stems from enhanced encoding/memory of a preferred reward. We tested the reward-value hypothesis by using a standard 8-arm radial maze task to compare spatial working memory accuracy of rats rewarded with either multiple chocolate or chow pellets at each location using a between-subjects design. The reward-value hypothesis predicts superior accuracy for high-valued rewards. We documented equivalent spatial memory accuracy for high- and low-value rewards. Importantly, a 24-h retention interval produced equivalent spatial working memory accuracy for both flavors. These data are inconsistent with the reward-value hypothesis and suggest that reward value does not explain our earlier findings that source memory survives unusually long retention intervals.  相似文献   
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