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To what extent do students and teachers hold similar beliefs about excellent teaching? Do differences in beliefs have practical implications (e.g., how students rate their teachers on end-of-semester evaluation forms)? In Study 1, undergraduate students (N=414) and faculty members (N=128) responded to questionnaires assessing their perceptions of an excellent discussion leader, lecturer, or instructor. Participants judged items that contributed to a Structure composite as more characteristic of excellent lecturers than excellent discussion leaders and items that contributed to a Process composite as more characteristic of excellent discussion leaders than excellent lecturers. Results for students and teachers showed several systematic differences. In Study 2,278 students and their course teachers rated the characteristics of a hypothetical excellent lecturer. In addition, students rated the effectiveness of their individual teachers. Students’ ratings of their teachers were higher when students and teachers agreed on their perceptions of characteristics of excellent lecturers.  相似文献   
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Median based smoothing algorithms have received considerable attention in the last few years. Their properties make them sometimes superior to linear smoothers. In this paper we develop an expression for the bivariate distribution of a median- smoothed Markov chain and we illustrate one application of it by comparing the power spectra of the input and the output of a median smoother when the input is binary valued.  相似文献   
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In this paper, we focus on the potential innovative benefits to corporate venture capital (CVC), i.e. equity investments in entrepreneurial ventures by incumbent firms. We propose that corporate venture capital programs may be instrumental in harvesting innovations from entrepreneurial ventures and thus an important part of a firm's overall innovation strategy. We hypothesize that these programs are especially effective in weak intellectual property (IP) regimes and when the firm has sufficient absorptive capacity. We analyze a large panel of public firms over a 20-year period and find that increases in corporate venture capital investments are associated with subsequent increases in firm patenting.  相似文献   
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In an effort to provide high-quality preschool education, policymakers are increasingly requiring public preschool teachers to have at least a Bachelor's degree, preferably in early childhood education. Seven major studies of early care and education were used to predict classroom quality and children's academic outcomes from the educational attainment and major of teachers of 4-year-olds. The findings indicate largely null or contradictory associations, indicating that policies focused solely on increasing teachers' education will not suffice for improving classroom quality or maximizing children's academic gains. Instead, raising the effectiveness of early childhood education likely will require a broad range of professional development activities and supports targeted toward teachers' interactions with children.  相似文献   
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This study compared the Qualitative Scoring System for the modified version of the Bender-Gestalt Test and the Developmental Scoring System for the Bender-Gestalt Test in predicting performance on the Metropolitan Achievement Test. The subjects were 409 first through fourth graders from regular classes in a public elementary school. Both scoring systems correlated significantly with school achievement. However, the Qualitative system correlated higher than the Developmental system with all Metropolitan Achievement Test subscores. Tests for differences between correlations indicated that five of these comparisons were statistically significant.  相似文献   
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