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21.
In two experiments, we examined two related conditioning problems previously investigated by Red-head and Pearce (1995a) and Pearce, Aydin, and Redhead (1997). Experiment 1 involved an A+, B+, C+, AB+, AC+, BC+, ABC2 discrimination. The Rescorla-Wagner model predicts that response to AB, AC, and BC will be greater than that to A, B, and C at asymptote, whereas the Pearce model makes the opposite prediction. In Experiment 2, we investigated the responding to a novel ABC compound in groups trained with either A+, B+, C+ or AB+, AC+, BC+. The Rescorla-Wagner model predicts greater response to ABC in the group trained with A+, B+, C+ than in the group trained with AB+, AC+, BC+, whereas the Pearce model makes the opposite prediction. In contrast to the findings of Redhead and Pearce (1995a) and Pearce et al. (1997) in pigeon autoshaping, our findings in rabbit eyelid conditioning support the Rescorla-Wagner model. 相似文献
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Maria Veronica Santelices Edgar Valencia Jorge Gonzalez Sandy Taut 《Educational Assessment, Evaluation and Accountability》2017,29(2):111-146
This research examines empirically the relationship between two measures of teacher quality: one based on professional standards and a second one using teacher value-added estimates. It also studies the extent to which teacher observable characteristics, such as teacher training variables, are associated to better performance on either of these measures and whether any of these two assessments is able to effectively measure teacher quality isolated from the effect of the context where teachers work. Context in this article is defined as any variable that is not under the direct control of the teacher but plays an important role on student learning and we believe is captured by school and municipal variables. The study uses hierarchical linear models and information from national and standardized assessments from Chile, specifically from the municipal education sector. Results show a small correlation between the two measures of teacher quality, in the lower end of results from previous studies conducted in the USA, and suggest that there is only a limited relationship between both measures of teacher quality. Teacher initial education type and professional development were statistically associated only to the standard-based measure of teacher quality. Context (both the school and municipal levels) plays an important role in the teacher effect measure, and in the standard-based measures, therefore, we conclude that neither of these measures are context-free. We expect that these results will contribute to the discussion about how to best measure teacher quality and how to evaluate teacher performance both in Chile and other parts of the world. 相似文献
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Edgar E. Willis 《Communication Studies》2013,64(3):187-193
The advent of radio broadcasting brought some significant changes into presidential campaigns but it jailed to produce other changes that one might have expected to arise from the use of this new communications medium. This paper describes the changes that took place and examines the reasons for certain expected changes failing to materialize. 相似文献
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Harrison B. Summers Robert E. Summers John H. Pennybacker Giraud Chester Garnet R. Garrison Edgar E. Willis 《Communication Booknotes Quarterly》2013,44(10):165-167
Harrison B. Summers, Robert E. Summers, and John H. Pennybacker, Broadcasting and the Public (Belmont, Calif.: Wadsworth Publishing Co., 1978—$13.95) Giraud Chester, Garnet R. Garrison, and Edgar E. Willis, Television and Radio (Englewood Cliffs, N.J.: Prentice-Hall, l978—price not given) Saundra Hybels and Dana Ulloth, Broadcasting: An Introduction to Radio and Television (New York: D. Van Nostrand Co., 1978— price not given) 相似文献
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Edgar W. Jenkins 《课程研究杂志》2013,45(2):132-151
This paper explores the ways in which the ‘nature of science’ (NoS) has been interpreted, accommodated and justified within school curricula since science was first schooled in the mid-nineteenth century. It explores how different interpretations of ‘the NoS’ have been invoked by those seeking to reform school science education in response to wider political, economic or social concerns such as the demand to ‘humanise’ school science teaching, to increase the supply of qualified scientists or to promote scientific literacy. It offers some comments upon the implications of these interpretations for current attempts to promote the ‘NoS’ in school science education. The focus of attention is England and, to a lesser extent, the USA but the issues raised are of contemporary relevance to many other parts of the world. 相似文献
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