
Surveys/ Questionnaires - Strongly designed questions allow researchers to analyze responses and summarize results *low response rates
Interviews - One-on-one or focus group interviews use standard or probing questions *high response rates
Observation - A participant or non-participant in the research activity immerses himself in observing behavior and reactions of others
Psychometrics - "Self-report questionnaires, objective tests, and normative, criterion-referenced and idiogrpahic tests" (Brewerton & Millward, 2002)
Company records - Attendance, participation, operations reports, performance reviews, reports, blogs etc.
Not all research methods are appropriate or feasible in all situations. Consider the following criteria when making your decision: credibility, practicality, timeliness, accuracy, objectivity, scope, availability, cost effectiveness.
Reference:
Brewerton, P., & Millward, L. (2002). Organizational Research Methods. Thousand Oaks, CA: Sage Publications.