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61.
Wayne A. Hershberger 《Learning & behavior》1986,14(4):443-451
Forty food-deprived cockerel chicks were tested individually in a straight runway containing a familiar food cup that moved when the chicks moved. The food cup always moved in the same direction as the chick: For 20 experimental chicks it moved twice as far as the chick; for 20 control chicks it moved half as far. In Lewis Carroll’s (1898/1926) picturesque terminology, the experimental chicks were tested in Alice’s “room through the looking-glass,” in which, in order to approach the food cup, they had to “walk the other way.” Although the control chicks performed well, the experimental chicks evinced the runway behavior that characterizes positive feedback: They persistently chased the food cup away. This means that the spatial polarity of visual feedback is critical and implies that an ordinary approach response is but an automatic (closed-loop) realization of an intended visual perception. 相似文献
62.
ABSTRACTIn this paper, our purpose is to investigate policy informing texts and discourses referencing transgender equality and gender diversity in the Western Australian education system. Drawing on scholarship from transgender, queer and policy studies, we highlight the interplay of progressive and conservative forces affecting the Western Australian education system’s commitment to supporting transgender and gender non-binary students. Based on a Social Sciences and Humanities Research Council of Canada (SSHRC) project, the paper constructs a Western Australian case study, which threads together the critical examination of policy informing texts, qualitative interview data and media discourses surrounding public narratives, such as the Safe School Coalition Australia’s attempt to implement a school program, which builds awareness about gender and sexual diversity. Emerging through the material, discursive and spatial elements of locales and networks, our case study has the potential to deepen knowledge regarding the heuristic capacity of employing policyscape as an analytic category. In this vein, we draw attention to the possibilities and challenges for re-conceptualizing gender and providing trans-affirmative school spaces that promote equality. 相似文献
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This paper focuses on the Australian federal Parliamentary Inquiry into Boys’ Education, Boys: Getting it Right, which is shown to be an exemplary instance of recuperative masculinity politics. The paper demonstrates how, through a variety of rhetorical strategies, its anti‐feminist politics are masked and how the report works with essentialised differences between boys and girls. The argument is demonstrated through a focus on a number of the report’s recommendations, including the call for a recasting of current gender policy, the need for creating so‐called ‘boy‐friendly’ curricula, assessment and pedagogical practices, and for employment of more male teachers. The report draws on populist literature and submissions from the boys’ lobby, as well as practice‐oriented submissions to the neglect of theoretically oriented and (pro‐)feminist work. As such, the significance of the construction of masculinities to boys’ attachment to and performances in school is totally neglected, limiting the value of the report’s recommendations for improving schooling for both boys and girls. 相似文献
65.
A hurdle-jump escape response was employed to assess the laboratory rat’s aversion or attraction to different types of conspecific odor. Odorant donor subjects received 112 runway acquisition trials on a continuous reward schedule followed by 32 extinction trials, 112 acquisition trials on a 50% schedule of reward and nonreward followed by 32 extinction trials, or 144 “neutral” trials with no reward in the alley. Different groups of test subjects escaped from odor excreted by odorant subjects on (a) nonrewarded acquisition and extinction trials, (b) rewarded trials during continuous reinforcement, (c) rewarded trials during partial reinforcement, or (d) neutral trials; others escaped from a clean box. The principal findings were: (1) significant aversion to “odor of nonreward” appeared after the donor odorants had received 12 exposures to reward; (2) production of odor of nonreward by odorant subjects changed as a function of training experience with reward; (3) after repeated exposure to odor of nonreward, the escape response habituated; (4) greater or different odor excretion in extinction resulted from subjects trained on a continuous reward schedule than on a partial reward schedule. Relationships of the data to frustration theory were discussed, assuming that inferred differences in production of odor reflect differences in frustration reaction. 相似文献
66.
Julian G Elliott Neil Hufton Leonid Illushin Wayne Willis 《Cambridge Journal of Education》2001,31(2):179-204
Comparative studies of attitudes in different countries have resulted in the claim that parents in the USA and England tend to have unrealistically positive views of their children's schools and academic performance. Low expectations, together with a belief in the importance of natural ability, it has been argued, lead to low standards and reduce striving to succeed. The present study builds upon earlier investigations of children's attitudes, beliefs and behaviours in Sunderland, Eastern Kentucky and St Petersburg by surveying parental perspectives. Findings from these three regions reinforce earlier findings about English and American complacency and the more demanding nature of the Russian context. In line with our earlier studies, and contrary to the suggestion of a number of writers, an emphasis upon effort, rather than ability, was a strong feature of the English and American responses, although it is pointed out that such beliefs may not actually result in high work rates. The paper concludes by suggesting that the important role of parents in instilling important attitudes and behaviours in their children is undermined by the current emphasis upon schools as fundamentally responsible for ensuring high levels of achievement. 相似文献
67.
Thermodynamic principles are basic to an understanding of the complex fluxes of energy and information required to keep cells alive. These microscopic machines are nonequilibrium systems at the micron scale that are maintained in pseudo-steady-state conditions by very sophisticated processes. Therefore, several nonstandard concepts need to be taught to rationalize why these very ordered systems proliferate actively all over our planet in seeming contradiction to the second law of thermodynamics. We propose a model consisting of boxes with different shapes that contain small balls that are in constant motion due to a stream of air blowing from below. This is a simple macroscopic system that can be easily visualized by students and that can be understood as mimicking the behavior of a set of molecules exchanging energy. With such boxes, the basic concepts of entropy, enthalpy, and free energy can be taught while reinforcing a molecular understanding of the concepts and stressing the stochastic nature of the thermodynamic laws. In addition, time-related concepts, such as reaction rates and activation energy, can be readily visualized. Moreover, the boxes provide an intuitive way to introduce the role in cellular organization of "information" and Maxwell's demons operating under nonequilibrium conditions. 相似文献
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This study examined whether the candidate-controlled public relations tools of political ads and candidate blogs were successful in influencing the issue and news agenda of the major television news networks during the 2004 presidential election. Data showed strong correlations between blogs and the media agenda. Advertisements did not correlate with the media agenda. Cross-lag analyses showed that the media set the candidates' agenda. The authors suggest intermedia agenda setting occurred as the media transferred their agenda to campaign blogs. 相似文献