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2003. The psychology underlying successful retention practices. Journal of College Student Retention. Abstract
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2004. Reacciones de profesoras y profesores de la Universidad de Costa Rica ante la flexibilización del currículum para estudiantes con necesidades educativas especiales. Revista Electrónica Actualidades Investigativas en Educación. Abstract
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2005. Reflections on retention and persistence: Institucional actions on behalf of student persistence. Studies in Learning, Evaluation, Innovation and Development. Abstract
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2005. To what extent is higher education achievement conditioned by the secondary education model. Studies in Educational Evaluation. Abstract
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2005. La deserción estudiantil en la educación superior: el caso de la Universidad de Costa Rica. Actualidades Investigativas en Educación. Abstract

