This document discusses research approaches in second language classrooms. It compares the psychometric tradition, naturalistic inquiry, and action research. It identifies key differences such as the psychometric tradition valuing objectivity and quantitative data while naturalistic inquiry values subjectivity and qualitative data. Examples of research questions suited for each approach are provided. Finally, the document discusses finding a balance between objectivity and subjectivity in research, noting that when studying humans some level of subjectivity is needed to account for things like needs, interests, and personalities.