References of "Scientific Presentations in Universities or Research Centers"
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See detailSprachenlernen durch Geschichtenerzählen in der Schreibwerkstatt und mit iTEO
Kirsch, Claudine UL

Presentation (2013, January 23)

Wir gehen davon aus, dass Kinder eine Sprache lernen, wenn sie diese in unterschiedlichen Situationen und mit unterschiedlichen Personen benutzen, um etwas mitzuteilen, was ihnen wichtig ist. Zuhören ... [more ▼]

Wir gehen davon aus, dass Kinder eine Sprache lernen, wenn sie diese in unterschiedlichen Situationen und mit unterschiedlichen Personen benutzen, um etwas mitzuteilen, was ihnen wichtig ist. Zuhören, Kollaboration, Autonomie und Respekt sind wichtige Kompetenzen, die man in der Schule entwickeln muss. Da diverse (neue) Medien zum soziokulturellen Alltag der Kinder gehören, sollen sie auch im Sprachunterricht eingesetzt werden. Die Arbeit mit den Kindern in der Schreibwerkstatt und mit der iPad App iTEO (traitement de texte oral) basierten und basieren auf soziokonstruktivistischen Prinzipien. Die Ergebnisse unserer Studien zeigen, dass Kinder, die gemeinsam mit Kameraden Geschichten erzählten, ihre Sprache entwickelten (z.B. Wortschatz, Grammatik, diskursive Kompetenzen), sich metalinguistisches Wissen aneigneten und Lernstrategien erwarben. Das Ziel dieses Workshops ist es, die Konzepte 'Storying' und Schreibwerkstatt vorzustellen, das Programm iTEO auszuprobieren und mündliche und schriftliche Textproduktionen von Kindern zu analysieren. [less ▲]

Detailed reference viewed: 154 (3 UL)
See detailModular forms and the inverse Galois problem
Wiese, Gabor UL

Presentation (2013, January 17)

Detailed reference viewed: 96 (1 UL)
See detailEntwicklung der Zweitsprache und der Argumentationsfähigkeit
Kirsch, Claudine UL

Presentation (2013, January 11)

Detailed reference viewed: 64 (1 UL)
See detailTransversal skills and their importance in education and educational assessment
Greiff, Samuel UL

Presentation (2013, January 09)

Detailed reference viewed: 71 (1 UL)
See detailWorkshop on Modular forms and Galois representations
Yoo, Hwajong UL

Presentation (2013, January 07)

We present the result on non-optimal levels of reducible modular Galois representations.

Detailed reference viewed: 57 (2 UL)
See detailSustainable Migration Policies
Picard, Pierre M. UL

Presentation (2013, January)

Detailed reference viewed: 32 (0 UL)
See detailPrésentation du livre : Social Long-term Contracts in European Law
Hiez, David UL

Presentation (2013)

Detailed reference viewed: 63 (6 UL)
See detailBorderland Children in Europe. An Explorative Study
Venken, Machteld UL

Presentation (2013)

Detailed reference viewed: 10 (0 UL)
See detailPredicting Materials Properties, A Computer Game
Schilling, Tanja UL

Presentation (2013)

Detailed reference viewed: 36 (0 UL)
See detailThe Impracticality of Practical Knowledge in Educational Research
Popkewitz, Thomas S. UL

Presentation (2013)

Detailed reference viewed: 284 (2 UL)
See detailModeling default correlation in a US retail loan portfolio
Pisa, Magdalena UL

Presentation (2013)

Detailed reference viewed: 50 (10 UL)
See detailAnimation de la conférence de Pascale Kramer
Barthelmebs-Raguin, Hélène UL

Presentation (2013)

Detailed reference viewed: 55 (0 UL)
See detailMagnetic neutron scattering on nanomagnets
Michels, Andreas UL

Presentation (2013)

Detailed reference viewed: 40 (4 UL)
See detailMagnetic SANS on bulk magnets
Michels, Andreas UL

Presentation (2013)

Detailed reference viewed: 50 (5 UL)
See detailCrystallization in colloidal suspensions
Schilling, Tanja UL

Presentation (2013)

Detailed reference viewed: 49 (6 UL)
See detailTowards a EU-US free trade zone
Hofmann, Herwig UL

Presentation (2013)

Detailed reference viewed: 156 (4 UL)
See detailModeling default correlation in a US retail loan portfolio
Pisa, Magdalena UL

Presentation (2013)

Detailed reference viewed: 37 (7 UL)
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See detailSpace-Time Shear-Slip Mesh Update Method for Fluid-Structure Interaction Problems
Schippke, Henning; Zilian, Andreas UL

Presentation (2013)

Many practical problems in engineering consist of a structure surrounded by a fluid. These are all from the theoretical point of view fluid-structure interaction problems, in which the movement of the ... [more ▼]

Many practical problems in engineering consist of a structure surrounded by a fluid. These are all from the theoretical point of view fluid-structure interaction problems, in which the movement of the structure influences the flow field of the fluid and vice versa. In this contribution the structure is described in a total Lagrangian representation based on velocities and the 2nd Piola-Kirchhoff stress state as primal variables in a hybrid-mixed formulation, while the fluid is modelled via the incompressible Navier-Stokes equations with velocities and pressure as unknowns. The governing equations of fluid and structural dynamics are uniformly discretised using space-time finite elements [1]. The discretised model equations of the fluid are stabilised using a SUPG/PSPG approach. Shape and test functions are continuous within the space-time slabs, while across the space- time slabs the shape and test functions are continuous only in space, but discontinuous in time yielding a time-discontinuous Galerkin approach. The space-time discretisation of the coupled system with velocities and pressure as remaining unknowns lays the basis for a mathematically profound analysis due to its methodical uniformity. During the mesh generation of the fluid-structure problem a fitting mesh at the conjoint interface of fluid and structure is generated ensuring natively the geometric continuity. In the discretised flow domain, which model equations are formulated in the Eulerian framework, a mesh-moving scheme needs to be applied to avoid severe mesh distortions. In case of large but regular structural displacements a discontinuous mesh-moving scheme like the Shear-Slip Mesh Update Method (SSMUM) is applicable [2]. In order to increase robustness and conservation behaviour of the classical SSMUM a modification based on the space-time discretisation of the problem described above is investigated. In the Space- Time SSMUM (ST-SSMUM) the alteration of the spatial connectivity takes place continuously in the space-time domain. By avoiding sudden changes in the spatial connectivity between two adjacent space-time slabs any difficulty in evaluating the jump term is circumvented. The properties of the introduced ST-SSMUM is shown by a computation of the flow field of a rotating impeller, which can be interpreted as a simplified water turbine or blood pump. [less ▲]

Detailed reference viewed: 139 (2 UL)
See detailKonsum und die Modernisierung des Kaiserreichs
Lenz, Thomas UL

Presentation (2013)

Detailed reference viewed: 45 (1 UL)
See detailNoncognitive Skills and Adult Outcomes
Samuel, Robin UL

Presentation (2013)

Detailed reference viewed: 44 (0 UL)
See detailModeling default correlation in a US retail loan portfolio
Pisa, Magdalena UL

Presentation (2013)

Detailed reference viewed: 46 (8 UL)
See detailContesting Education. Media Debates and the Public Sphere in Luxembourg.
Lenz, Thomas UL

Presentation (2013)

Detailed reference viewed: 48 (0 UL)
Full Text
See detailNumerical analysis of free-surface flow through rotating machines
Schippke, Henning; Zilian, Andreas UL

Presentation (2013)

In the context of the transformation process currently taking place in the energy production sector, energy gained from renewable power sources shall replace the present mixture, which mostly relies on ... [more ▼]

In the context of the transformation process currently taking place in the energy production sector, energy gained from renewable power sources shall replace the present mixture, which mostly relies on fossil burnings. Therefore, in the future most of the energy shall be gained by harvesting power from sun, wind or water, geothermal heat or biomass. In case of converting energy from wind into electrical power wind turbines are used in general, while hydropower turbines are the state-of-the-art machinery to derive energy from running water. In order to convert the potential energy from running water as well water wheels pose the method of choice. Turbines in air or water represent mechanically a two-field system, in which the structure of the turbine is surrounded by a streaming fluid. Due to the elasticity of the rotor blades the stresses of the fluid onto the structure deform the blades, which in return yield a time-dependent flow domain. Therefore turbines in a streaming fluid represent a typical example of fluid-structure interaction. Furthermore, in case of water wheels the surrounding air as third field and additional fluid phase comes into play introducing a free surface. In this contribution the governing equations of incompressible fluid flow are presented using primal variables and discretised via the space-time finite element method [3]. The discretised model equations of the fluid are stabilised using an SUPG/PSPG approach. Shape and test functions are continuous within the space-time slabs, while across the space- time slabs the shape and test functions are continuous only in space, but discontinuous in time yielding a time-discontinuous Galerkin approach. Due to the moving rotor blades a mesh moving technique needs to be incorporated into the computational set-up. Considering the occurring large but regular displacements of the flow boundary arising from the rotating rotor blades the shear-slip mesh update method (SSMUM) [1] as discontinuous mesh moving technique is applied. In case of water wheels the free surface is described implicitly via a Level-Set function [2] yielding a single fluid phase with almost discontinuous density and viscosity. The verification and validation of the developed numerical scheme is carried out with the help of computing classical benchmark problems as well as via a comparison to existing experimental data. [less ▲]

Detailed reference viewed: 97 (3 UL)
See detailPredicting Materials Properties - A Computer Game
Schilling, Tanja UL

Presentation (2013)

Detailed reference viewed: 47 (2 UL)
See detailSocial interactions, social capital and urban structure
Picard, Pierre M. UL

Presentation (2013)

Detailed reference viewed: 32 (2 UL)
See detailSpatial segregation and urban structure
Picard, Pierre M. UL

Presentation (2013)

Detailed reference viewed: 89 (6 UL)
See detailE.T.A. Hoffmann und das Experiment
Küpper, Achim UL

Presentation (2013)

Detailed reference viewed: 43 (0 UL)
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See detailMarriage formation with assortative meeting as a two-sided optimal stopping problem
Tampieri, Alessandro UL; Parilina, Elena

Presentation (2013)

Detailed reference viewed: 68 (0 UL)
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See detailArts vs Engineering: Choosing Consumption of and Investment in Education
Tampieri, Alessandro UL; Richard, Romano

Presentation (2013)

Detailed reference viewed: 78 (7 UL)
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See detailArts vs Engineering: Choosing Consumption of and Investment in Education
Tampieri, Alessandro UL; Romano, Richard

Presentation (2013)

Detailed reference viewed: 74 (4 UL)
See detailEmpirical Welfare Analysis - When Preferences Matter
Carpantier, Jean-Francois UL

Presentation (2013)

Detailed reference viewed: 80 (5 UL)
See detailStyles of Reason: Two Forms of Curriculum History
Popkewitz, Thomas S. UL

Presentation (2013)

Detailed reference viewed: 56 (0 UL)
See detailAttachment and reflective function in a sample of Italian adopted adolescents
Molina, Paola; Casonato, Marta; Manavella, Giorgia et al

Presentation (2013)

Detailed reference viewed: 52 (5 UL)
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See detailStudents Social Origins and Targeted Grade Inflation
Tampieri, Alessandro UL

Presentation (2013)

Detailed reference viewed: 18 (0 UL)
See detailStudying and teaching in a multilingual university : Policies, practices, learning outcomes
de Saint-Georges, Ingrid UL; Hu, Adelheid

Presentation (2012, December 17)

Detailed reference viewed: 134 (4 UL)
See detailMultilingualism as capital: Linguistic repertoires of immigrant entrepreneurs
Serwe, Stefan Karl UL

Presentation (2012, December 17)

Integrating migrants into national labour markets is arguably of perennial concern for governments across Europe. Self-employment or entrepreneurship has been identified as a possible route to active ... [more ▼]

Integrating migrants into national labour markets is arguably of perennial concern for governments across Europe. Self-employment or entrepreneurship has been identified as a possible route to active professional participation (Light & Gold 2001, Leicht et al. 2012). Studies of immigrant businesses identified multilingual language proficiency as an important aspect of their success (Light 2007). On the one hand, heritage language proficiency may provide the means to maintain advantageous social network ties to coethnic business partners (Aldrich & Waldinger 1990). On the other, sustainable growth is apparently directly related to certain levels of proficiency of the main language of the economy (Nekvapil 2009, Kloosterman 2010). While studies in applied linguistics have stressed the pragmatic impact of multilingualism in service encounters in entrepreneurial contexts (e.g. Leung 2009, Collier 2006, 2010, 2011), I believe that more work needs to be done in accounting for the value of multilingualism across the whole range of linguistic practices that self employment requires. The aim of this presentation is to take a first step into this direction by investigating the ways immigrant business owners navigate professional practices linguistically. For this presentation I intend to examine autobiographic narratives of five successful female business owners with Asian roots who have set up businesses in the borderlands of Germany, Luxemburg and France, so as to reconstruct the ways these individuals employ and develop their linguistic repertoires in connection to their workplace practices. The paper shall thus shed some empirical light on commonly held assumptions about heritage language use as an asset and majority language(s) use as a problem in such professional settings. [less ▲]

Detailed reference viewed: 149 (9 UL)
See detailEinführende Überlegungen zum Beobachten mit Video
Sunnen, Patrick UL; Sujbert, Monika UL

Presentation (2012, December 13)

Detailed reference viewed: 77 (0 UL)
See detailNumber-space interactions and how they develop over lifespan
Schiltz, Christine UL

Presentation (2012, December 05)

Detailed reference viewed: 61 (1 UL)
See detailOptical and vibrational properties of M0S2
Wirtz, Ludger UL

Presentation (2012, November 26)

Detailed reference viewed: 99 (2 UL)
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See detailSustainable Regional Development through Energetic Regionlaisations
Faller, Fabian UL

Presentation (2012, November 20)

The goal of my research project is to analyse processes of (re)productions of regions within the biogas sector and illustrate different development paths. The case study is located in the border area of ... [more ▼]

The goal of my research project is to analyse processes of (re)productions of regions within the biogas sector and illustrate different development paths. The case study is located in the border area of Luxembourg and Germany. The application of renewable energies in decentralised ways is considered being the ultimate chance for a long lasting prosperous and environmentally sound regional development, since they trigger various positive effects (e. g. regional value added, less power loss, lower susceptibility to discrepancies, substitution of energy imports, job creation etc.). To effectively and efficiently implement decentralised renewables, such as bioenergy, photovoltaics or wind power, the interaction and collaboration of various regional and sub-/supra-regional actors is necessary. They all – at least slightly - differ in their perspectives on challenges for energy supply as well as on the region itself. Hence, questions of space and scale arise: If the transition to renewable energies can be achieved by a decentralised utilisation, where does this take place, what is the region for implementing them? Or vice versa – my core research question: Which processes of regionalisations are initiated through the utilisation of renewable energies, especially biogas production? To address this question, I apply a multi-theory and multi-method approach. In theoretic terms, I put on two “glasses”. On the one hand, I analyse institutional and structural conditions that frame processes of regionalisations in the biogas economy and how these conditions relate to socio-technical developments. My theoretical approach is based on evolutionary institutionalism and socio-technical transition studies. Therefor, industrial networks and strategic games, techno-scientific knowledge, cultural and symbolic meanings, sectorial policies, as well as markets and user practices are important elements of analysis. It is important to be aware of the dynamic dimension of frameworks (development and change / evolution), the concurrence of political, social, economic and technical processes, the long lasting transformations, and the spatial differences (context) (cf. Boschma/Frenken, 2006; Glückler, 2007; Hayter, 2004; Jones/Murphy, 2010; Truffer, 2008) – that are typical not only for decentralised technologies. My focuses of investigation from this perspective are threefold. First, I explore the legal framework, contractual agreements and association/group structures that relate to biogas production. Second, I study the political, social, and economic developments in the biogas sector and their effects on technological developments. And third, I analyse the alignments of institutional structures and individual decision making with new biogas technologies. I apply a retrospective perspective, looking back at the period from the mid-1990s (liberalisation of EU energy market, upcoming of bioenergy) till today. On the other hand, I shift the focus to economic practices and everyday actions of actors in the biogas economy (e.g. operators, investors). The main goals are to analyse the economic utilisation of spatial categories and contexts, and to uncover the relationship of economy, action and spatial references. In which ways do everyday actions constitute, reproduce and transform scale and space metaphors („regions“)? Which action responses do they trigger? Which external regionalisations influence the actors’ decisions – regionalisations “done” by non-economic actors (e.g. planners, politicians, NGOs, media)? How do biogas producers perceive external regionalisations? I focus on processes of constitution and reproduction of different types of energy regions and the modes and patterns, in which practices influence the processes of regionalisations – following Benno Werlen’s theory of everyday regionalisations (Werlen, 1999; 2007; 2010). In terms of methodology I am currently using two different concepts. Since I apply, on the one hand, an action oriented approach to regionalisations, I conduct interviews with actors in the biogas economy to investigate elements such as perceptions, performances, patterns, power relations, or intensions. I will set these elements in the context of scale and space metaphors: doings and sayings with spatial references or connotations – whether explicit or implicit. On the other hand I apply document analysis for extracting different “regions” that are expressed, for example, in strategy papers, business reports, official statements, laws, directives, planning documents, or media coverage. I will, in another step, confront experts with the findings from the second data source to examine, how they – if at all – perceive them and how they incorporate them into their practices. The findings and theoretical thoughts shall lead to a better understanding of processes of regionalisations and different concepts or connotations of the region, for theoretical purposes as well as to inform policy making. Furthermore, I aim at enriching or even opening the floor for two discussions. At the one hand, how theories of economic practice might enrich evolutionary approaches to understand economic processes. At the other hand – and in the context of a energy / bioenergy debate – how a new perspective on the relations between economy and environment can help us to conceptualise an Environmental Economic Geography that takes Economic/Corporate Greening, Environmental Governance, Facets of North-South-Relations and other Greening Contexts serious. [less ▲]

Detailed reference viewed: 102 (3 UL)
See detailLangues officielles, langues officieuses en tension au travail : quelles pratiques observables? Quels réinvestissements dans la formation?
Lejot, Eve UL

Presentation (2012, November 16)

Les sites principaux d’un constructeur aéronautique européen sont implantés en Allemagne et en France. Cependant, comme le stipulent certains documents internes l’anglais est la langue officielle de ... [more ▼]

Les sites principaux d’un constructeur aéronautique européen sont implantés en Allemagne et en France. Cependant, comme le stipulent certains documents internes l’anglais est la langue officielle de l’entreprise. Les déclarations des salariés deviennent plus flottantes quand on en vient au fonctionnement par département. L’équipe de travail est présentée par les personnes interviewées comme une zone à part par ses propres règles linguistiques. Nous avons analysé les tensions entre le prescrit et l’observable notamment grâce à l’étude du « mais » des entretiens. Lorsqu’ils abordent le sujet de la dimension personnelle, les salariés sont souvent tentés de se justifier de certains choix qui sont faits pour accomplir leurs tâches de travail au mieux. Ces choix dépendent de la compétence plurilingue et sont parfois mal assumés si cette dernière est limitée. Cette constatation nous invite à repenser les schémas de formations encore employés aujourd’hui. [less ▲]

Detailed reference viewed: 95 (0 UL)
See detailHow to measure Collaborative Problem Solving? Some item prototypes
Greiff, Samuel UL; Martin, Romain UL

Presentation (2012, November 12)

Detailed reference viewed: 67 (1 UL)
See detailDémocratie et autocratie chez Kelsen
Lefort, Elisabeth UL

Presentation (2012, November)

Detailed reference viewed: 47 (0 UL)
See detailMixed-Methods Approach in Displacement/Migration Studies
Wayessa, Gutu Olana UL

Presentation (2012, October 31)

Detailed reference viewed: 59 (2 UL)
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See detailModelling Thermochemical Processes in Granular Media
Hoffmann, Florian UL

Presentation (2012, October 26)

Detailed reference viewed: 86 (1 UL)
See detailNanocrystalline permanent magnets—energy-efficient materials
Michels, Andreas UL

Presentation (2012, October 26)

Detailed reference viewed: 47 (1 UL)
See detailCritical presentation of the results of the linguistic and intercultural group
Ehrhart, Sabine UL

Presentation (2012, October 17)

Detailed reference viewed: 65 (1 UL)
See detailInterlinguistic activities as bridges for intercultural encounters
Ehrhart, Sabine UL

Presentation (2012, October 16)

Detailed reference viewed: 56 (2 UL)
See detailTechnical-based assessment of 21st century skills in an applied context
Greiff, Samuel UL; Funke, Joachim

Presentation (2012, October 15)

Detailed reference viewed: 58 (1 UL)
See detailPotentials of assessment of 21st century skills in technical environments
Greiff, Samuel UL; Reeff, J.-P.

Presentation (2012, October 15)

Detailed reference viewed: 53 (1 UL)
See detailLa question de la démocratie chez Kelsen
Lefort, Elisabeth UL

Presentation (2012, October)

Detailed reference viewed: 48 (1 UL)
See detailLänderbericht Luxemburg
Fischbach, Antoine UL; Bertemes, Jos

Presentation (2012, October)

Detailed reference viewed: 56 (9 UL)
See detailThe Trained Genius: Admission to Art Schools
Rothmüller, Barbara UL; Fleischmann, Alexander

Presentation (2012, September 05)

Detailed reference viewed: 66 (2 UL)
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See detailResolution of Different Length Scales by an Efficient Combination of the Finite and the Discrete Element Method
Michael, Mark UL; Peters, Bernhard; Vogel, Frank

Presentation (2012, September 04)

Detailed reference viewed: 97 (0 UL)
See detailMultimodalité et analyse de trajectoires situées
de Saint, Ingrid UL

Presentation (2012, September)

Detailed reference viewed: 45 (0 UL)
See detailSuper-diversity and self-employment: The language use of ethnic entrepreneurs
Serwe, Stefan Karl UL

Presentation (2012, August 23)

In the wake of globalization, technological and infrastructural changes have substantially increased the mobility of migrants all over the world. Across Europe these developments have added more variety ... [more ▼]

In the wake of globalization, technological and infrastructural changes have substantially increased the mobility of migrants all over the world. Across Europe these developments have added more variety to migration populations, a fact that has been identified as super-diversity (Vertovec 2007, 2009). Studying linguistic diversity and variation, sociolinguists have begun the examination of language in super-diverse settings, in order to describe the interweaving and meshing of languages, identities, and language practices (Creese & Blackledge 2010, Blommaert & Rampton 2011). One particularly interesting field within which migrants make use of these transnational and ethnic resources is self-employment (Light & Gold 2000). In this professional domain the knowledge of (multiple) languages and ways of communicating has been presented as an asset and a challenge. To date studies that investigate the linguistic life worlds of migrant entrepreneurs in detail are only few in number. Focusing on the border region between Germany and Luxembourg, this paper aims to explore two aspects of the link between language use and self-employment among non-EU migrants. Firstly, I intend to understand the entrepreneurs’ linguistic trajectories into self-employment. Another aim is to explore how the professional endeavour has shaped each migrant’s linguistic repertoire. The analysis is part of a dissertation research project investigating the language practices of non-EU ethnic entrepreneurs. Following the approach of linguistic ethnography (Creese 2008), oral narrative interviews were part of the data generation. The analysis was informed by the study of language biographies as described by Franceschini (2002) with the aim of focusing on the entrepreneurs’ everyday reasons and experiences using and learning languages at and for their professional practices. The results show that for these migrant entrepreneurs the workplace becomes a site of informal acquisition of the majority languages. On the other hand language practices linked to business activities are sites of language maintenance of heritage languages. The data thus reveals patterns of language diversity management that is directly connected to the entrepreneur’s practical, occupational needs. Moreover, it shows the usefulness of employing language biographies as one of the methods to explore language use and learning in super-diverse workplace settings. [less ▲]

Detailed reference viewed: 115 (1 UL)
See detailAn approach to the functional analysis of movement
Huemer, Birgit UL

Presentation (2012, August 22)

Detailed reference viewed: 40 (0 UL)
See detailThe effect of language and mode on two-digit magnitude judgments in German-French bilingual adults
Ugen, Sonja UL; Van Rinsveld, Amandine UL; Schiltz, Christine UL et al

Presentation (2012, July 17)

The study examined the effect of language and presentation mode on numerical processing skills in German-French bilinguals. This bilingual combination is particularly interesting because the order of two ... [more ▼]

The study examined the effect of language and presentation mode on numerical processing skills in German-French bilinguals. This bilingual combination is particularly interesting because the order of two digit number words is inversed in both languages: decade-unit in French but unit-decade in German. Further, previous studies used written number word presentations as verbal notation to activate language, which are, however, rarely used in everyday life. The present study therefore tackled the question whether two-digit magnitude judgments are affected by the presentation mode (visual Arabic vs. auditory words) and the language (German vs. French)? Data stem from proficient German-French bilinguals (mean age: 25,3 years. The within-subject design involved two-digit number pair comparisons presented visually and auditory in German and in French. In line with previous studies, participants responded faster and more accurately on compatible than on incompatible trials in the visual Arabic presentation mode in both languages (compatibility effect): In compatible number pairs, the decades and units concord to the same magnitude decision (e.g. 23_57; decade: 2<5 and unit:3<7) whereas decade and units discord (47_82; decade: 4<8 but 7>2) for incompatible number pairs. In the auditory mode, the results showed a tendency for a regular compatibility effect in German and an inverse compatibility effect in French with participants responding faster on incompatible trials suggesting that bilinguals process numerical tasks in the language of presentation similar to monolinguals using the same language. Conclusively, the results imply differential numerical processing according to the presentation mode (visual Arabic vs. auditory words) and the language (German vs. French). [less ▲]

Detailed reference viewed: 73 (3 UL)
See detailA developmental investigation of the SNARC effect using a colour discrimination task.
Hoffmann, Danielle UL; Hornung, Caroline UL; Martin, Romain UL et al

Presentation (2012, July 17)

How do number-space interactions develop from childhood to adulthood? The SNARC effect (Spatial Numerical Association of Response Codes) reflects the finding that participants respond faster to small ... [more ▼]

How do number-space interactions develop from childhood to adulthood? The SNARC effect (Spatial Numerical Association of Response Codes) reflects the finding that participants respond faster to small numbers with their left hand and to large numbers with their right hand during a number classification task. Typically assessed through magnitude-independent parity judgment tasks, the SNARC effect is thought to show the automaticity of the number-space link. Using a parity task on children Berch et al. (1999) found a SNARC effect no earlier than from 9.2 years onwards. However, we hypothesise that parity judgments might be inappropriate to assess younger children. Therefore a more age-apropriate colour judgment task (implicit) and a magnitude judgement task (explicit) were designed and tested on 363 children from kindergarten to Grade 6 (5.8-12 years). The experimental tasks were complemented by a brief assessment of arithmetic skills. The results revealed overall significant SNARC effects [colour task t(355)=2.6, p<0.01; magnitude task t(340)=4.7, p<0.001], which interacted with grade [colour task F(6,355)=2.18; p<0.05; magnitude task F(6,340)=2.09; p=0.05]. Most interestingly, even the kindergartners already display both effects [colour task t(28)=1.96; p<0.05; magnitude task t(24)=1.7; p=0.05]. These results show explicit and implicit access to numerical magnitude in children as young as 5.8 years. [less ▲]

Detailed reference viewed: 104 (5 UL)
See detailAttentional shifts induced by uninformative number symbols modulate neural activity in human occipital cortex
Schiltz, Christine UL; Goffaux, Valérie; Martin, Romain UL et al

Presentation (2012, July 17)

Number processing interacts with space encoding in a wide variety of experimental paradigms. Most intriguingly, the passive viewing of uninformative number symbols can shift visuo-spatial attention to ... [more ▼]

Number processing interacts with space encoding in a wide variety of experimental paradigms. Most intriguingly, the passive viewing of uninformative number symbols can shift visuo-spatial attention to different target locations according to the number magnitude, i.e. small/large numbers facilitate processing of left/right targets, respectively. The brain architecture dedicated to these attention shifts associated with numbers currently remains unknown. Evoked potential recordings indicate that both early and late stages are involved in this spatio-numerical interaction, but the neuro-functional anatomy needs to be specified. Here we use, for the first time, functional magnetic resonance imaging (fMRI) to investigate attentional orienting following uninformative Arabic digits. We show that BOLD response in occipital visual regions was modulated by the congruency between digit magnitude (small/large) and target side (left/right). Additionally, we report higher BOLD responses following large (8, 9) compared to small (1, 2) digits in two bilateral parietal regions, yielding a significant effect of digit magnitude. We propose and discuss the view that automatic encoding of semantic representations related to number symbols in parietal cortex lead to shifts in visuo-spatial attention and enhanced visual processing in the occipital cortex according to number-space congruency rules. [less ▲]

Detailed reference viewed: 128 (0 UL)