approach over others. This openness is well-grounded, since "a
particular approach offers certain perspectives on a research
question, and, in this way, enables the researcher to study [these]
aspects of learning, while other aspects, that are not in focus using
the selected approach, become unclear or 'blurred'" (Berglund,
submitted for review). Thus, the selection an approach is closely
intertwined with the research question under investigation.