Sources of evidence for case studies There are six forms of evidence that could be collected Interviews Direct observations Participant observations Documentation Archival records Physical artifacts Colleting from multiple sources(triangulation) helps increase the reliability of that data8 Sources of Evidence for Case Studies • There are six forms of evidence that could be collected – Interviews – Direct observations – Participant observations – Documentation – Archival records – Physical artifacts • Colleting from multiple sources (triangulation) helps increase the reliability of that data