摘要：This article aims at highlighting the importance of triangulation as tool to compare and validate information coming from different sources and procedures. To do so, we assessed the needs for in-service training demanded by teachers and offered by the educational administration in Madrid (Spain). The data was collected using different techniques and analyzed with different data-analysis method and from this combination the results are richer and more complex. Starting with a short introduction about triangulation, we present methods, sources and analysis of the data as well main results and conclusions obtained via triangulation.
关键词：Triangulation; continuing teacher education; needs assessment; quantitative and qualitative methodology; statistical decision trees.;Triangulación; formación permanente del profesorado; evaluación de necesidades; metodología cuantitativa y cualitativa; árboles estadísticos de decisión.
