Qualitative data were collected from four sources: non-participant observations by three of the investigators CB, AF and NF with the help of a check list previously developed from field research, video and audio tapes of the activities at each of the 5 workstations, unstructured interviews of the 5 instructors, students answers to questions for evaluation of the course on a form prepared by two members of the research team DA-RC.
Técnica de observación no participativa, realizada por 3 de los investigadores CB, AF y NF, acogiéndose a una guía o lista de chequeo previamente definida desde investigaciones del campo.