An analysis of the difficulties experienced by students when applying the principle of superposition to electric fields is first presented. Two main obstacles are illustrated: the students' needs for an effect to accept the existence of a field, and a causal interpretation of some relationships. An experimental sequence aiming at overcoming the latter obstacle is described. The evaluation, on the basis of "conceptual profiles," is also presented.
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Keywords:Vocational/Professional Development Education,Higher Education,Assessment,NSDL,oai:nsdl.org:2200/20061003065218824T,Education Foundations,Undergraduate (Upper Division),Undergraduate (Lower Division),Education Practices,Physics,Electric Fields and Potential,Electric Field,NSDL_SetSpec_439869,research teaching,instructional strategies,Instructional Material Design,Electricity & Magnetism,Physics Education Research,Education,General Physics,Graduate/Professional
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