anchor: These are (1) submitting reports to people from whom data were collected and printing their critiques with the report, (2) use of multiple data collection methods within case studies, and (3) adoption of the audit trail or chain-of-evidence technique.
positive: These include turning in reports to those whom data were collected from, use of several data collection methodologies, and using the audit trail.
negative: Reports do not need to be turned in for those whom data was collected from.