Mixed methods research combines both qualitative and quantitative research approaches and methods. There are four main types of mixed methods designs: triangulation design, embedded design, explanatory design, and exploratory design. The triangulation design concurrently collects and analyzes quantitative and qualitative data to compare or validate results. The embedded design has one data type play a supportive role to the other. The explanatory design uses qualitative data to explain initial quantitative results, while the exploratory design uses qualitative data to develop instruments for a subsequent quantitative phase. Mixed methods research provides a more comprehensive understanding of research problems than a single method alone.