Factorial structure of the New Ecological Paradigm scale in two French samples     

Ghozlane Fleury-Bahi  Aurore Marcouyeux  Elise Renard  Nicolas Roussiau 《Environmental Education Research》2015,21(6):821-831

The principal objective of this research is to test the factorial structure of the New Ecological Paradigm scale on a population of men and women residing in France. The tested model is a second-order factorial model. This factorial structure is evaluated on two separate samples to test the stability of the solution (a first sample of 253 participants, diversified in terms of age and socioprofessional category, and a second sample of 266 students). The results confirm the existence of a second-order factorial structure in which environmental beliefs, measured based on 13 items taken from the New Ecological Paradigm scale, would constitute a homogeneous system of beliefs supported in five distinct dimensions.  相似文献   

Getting cited: Does open access help?   总被引：1，自引：0，他引：1  

Patrick Gaulé  Nicolas Maystre 《Research Policy》2011,40(10):1332-1338

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A cognitive gap between arithmetic and algebra   总被引：1，自引：0，他引：1  

Nicolas Herscovics  Liora Linchevski 《Educational Studies in Mathematics》1994,27(1):59-78

Serious attempts are being made to improve the students' preparation for algebra. However, without a clear-cut demarcation between arithmetic and algebra, most of these undertakings merely provide either an earlier introduction of the topic or simply spread it out over a longer period of instruction. The present study investigates the upper limits of the students' informal processes in the solution of first degree equations in one unknown prior to any instruction. The results indicate the existence of acognitive gap between arithmetic and algebra, a cognitive gap that can be characterized asthe students' inability to operate spontaneously with or on the unknown. Furthermore, the study reveals other difficulties of a pre-algebraic nature such as a tendency to detach a numeral from the preceding minus sign in the grouping of numerical terms and problems in the acceptance of the equal symbol to denote a decomposition into a difference as in 23=37–n which leads some students to read such equations from right to left.This research was funded by the Quebec Ministry of Education (Fonds FCAR-92-ER-1032).The authors wish to thank Patricia Lytle for her many helpful suggestions in the preparation of this paper.  相似文献   

Rabbit nictitating membrane conditioning: Lower limit of the effective interstimulus interval     

W. Ronald Salafia  Richard W. Lambert  Karen C. Host  Nicolas L. Chiaia  Julio J. Ramirez 《Learning & behavior》1980,8(1):85-91

In three experiments, the nictitating membrane response of rabbits was conditioned for 10 daily sessions at interstimulus intervals (ISIs) ranging from 48 to 125 msec, followed by a shift to 250 msec for 5 days. At tested ISIs shorter than 67 msec, there was no evidence of conditioning, and postshift performance revealed neither facilitation nor interference as a result of the first 10 conditioning sessions. Postshift performance of groups conditioned at preshift ISIs of 67 msec or longer revealed a gradient of increasing savings with increasing ISI. One of the groups in Experiment 1, initially conditioned at 250 msec ISI and then shifted to 48 msec, exhibited extinction of the previously well-conditioned response. Analysis of CR-onset latencies substantiated the absence of associative effects at very short ISIs. It was concluded that there is a temporal limit below which classical conditioning of the nictitating membrane response of rabbits employing forward CS-US pairing does not occur.  相似文献   

Objectives, agreements and matching in science-industry collaborations: reassembling the pieces of the puzzle   总被引：1，自引：0，他引：1  

Nicolas Carayol 《Research Policy》2003,32(6):887-908

Science-industry collaborations have been the subject of a considerable attention in the last few years. The paper argues that, however, the existing studies are still restricted to a partial view of the phenomenon. In this respect, our study departs from the specialised literature by taking into consideration, for a given set of heterogeneous collaborations, information from both the academics’ and the firms’ side, relative to their characteristics, their aims and the collaboration settings. To do so, we constructed a database of 46 collaborations from original data we collected, in several European countries and in the US, within the SESI-TSER project. The first outcome of our study is a typology of science-industry collaborations built on a formal procedure (a multi-correspondence analysis followed by an ascendant hierarchical classification) exhibiting five coherent types of collaborations that we describe precisely. Highlighting the crucial importance of research agendas, we thus propose a simple rationale for the matching process. The latter leads us to propose an “assortative” matching hypothesis generating two polar configurations which we test and confirm. Finally, we examine the policy implications of the findings.  相似文献   

‘Libre’ software: turning fads into institutions?     

Jean-Michel Dalle  Nicolas Jullien 《Research Policy》2003,32(1):1-11

The article presents an economic analysis of Libre software and of its sustainability as a new economic model for software. We underline the role of Libre software development communities and analyze incentives for both kernel and obscure developers. We emphasize the role of the so-called ‘public’ licenses to provide an appropriate institutional framework. We show that several features of Libre software also allow it to improve faster than proprietary software, and therefore to achieve strong market performance when competing against existing standards, even when proprietary software producers react. We illustrate our point using a simple local and global interaction model to study the technological competition between Linux and Windows on the server operating system (OS) market. We finally argue that if sufficient initial momentum could be created through public intervention Libre software could turn from a fad into an efficient economic institution to correct inefficiencies due to network externalities.  相似文献   

Why We Take Prozac     

Nicolas Rasmussen 《Metascience》2005,14(2):219-223

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Advances of the Semantic Web for e-learning: expanding learning frontiers     

Ambjörn Naeve  Miltiadis Lytras  Wolfgang Nejdl  Nicolas Balacheff  Joseph Hardin 《British journal of educational technology : journal of the Council for Educational Technology》2006,37(3):321-330

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Reviews     

Ivan Crozier  Patricia Fara  Jon Hodge  Brendan Kitts  Robin Knight  Sverre Myhra  David Oldroyd  Elizabeth A. Wilson  Rosemary Robins  Stephen Dovers  John Forge  Harshi Gunawardena  Jenny Tannoch-Bland  Loet Leydesdorff  David Oldroyd  David Oldroyd  David Oldroyd  Nicolas Rasmussen  Greg Restall  Helaine Selin  Michael Shortland  E. E. Sleinis  Fiona Solomon  Scott McQuire  Maurice Crosland  David Farrier  Roslynn Haynes  Sverre Myhra  Colin Russell  Libby Robin  Karin Garrety  Stephen Gaukroger  Stephen Ames  Wendy Varney  Vojislav Bozickovic  Phil Dowe 《Metascience》1996,5(2):71-192

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Reviews     

Anthony Corones  Deborah Dowling  Andrew G. Bonnell  Jean Lachapelle  David Oldroyd  Emma Spary  Ben Oldroyd  Keith Campbell  Ragbir Bhathal  Phil Dowe  Antonina Harbus  Cathy Legg  Brian Martin  Yvonne Luxford  Nicolas Rasmussen  Paul Redding  Tim Sprod  Roland Sypel 《Metascience》1996,5(1):167-235

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