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This study investigated how great apes and human infants use imperative pointing to request objects. In a series of three experiments (infants, N = 44; apes, N = 12), subjects were given the opportunity to either point to a desired object from a distance or else to approach closer and request it proximally. The apes always approached close to the object, signaling their request through instrumental actions. In contrast, the infants quite often stayed at a distance, directing the experimenters' attention to the desired object through index‐finger pointing, even when the object was in the open and they could obtain it by themselves. Findings distinguish 12‐month‐olds' imperative pointing from ontogenetic and phylogenetic earlier forms of ritualized reaching. 相似文献
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This study provides insight in age differences in the amount of media multitasking and in the media that people combine. Results of a diary study (N = 3,048) among 13- to 65-year-olds reject the popular notion that media multitasking is particularly prevalent among young people. The youngest (13–16 years) and the oldest (50–65 years) age groups did distinguish themselves in terms of media combinations. The youngest group particularly combined music with online activities, whereas the oldest group was unique in combining radio with e-mail or newspapers. A plausible explanation for these age differences in media multitasking are lifespan related and generational differences in media use in general. 相似文献
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Over the last few years, questions in the Australian polls aboutthe rate of immigration and the rate of Asian immigration havegenerated a remarkably wide range of response. While most ofthe polls conducted since 1984 suggest majority opposition tothe rate at which immigrants, including Asian immigrants, havebeen coming to Australia, other polls suggest majority support.Differences between the 1984 poll figures and some of the morerecent polls may reflect changes over time. Other polled differencesalmost certainly reflect differences in the way the questionswere worded. However, the most remarkable if least obvious causeof the difference seems to be the contexts in which the questionswere asked; more precisely, differences in the length and focusof the various questionnaires in which questions on immigrationwere embedded. Public opinion on the rate of immigration isnot only ‘soft’, it is created in the very attemptto measure it. Under these circumstances there is little pointin trying to isolate ‘majority opinion’ or in attemptingto establish which of the polls provides the most accurate reading.Where different readings are a product of differing contextsthey may be best understood in terms of competing conceptionsof what ‘public opinion’ itself is all about. 相似文献
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