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Triangulate for Truth
Reliability of self-reported data can be compromised by motivations to lie or forgetfulness, particularly in sensitive areas like criminal history. To achieve accuracy in measuring outcomes, it is recommended to triangulate data sources rather than relying on a single method. This includes using peer reports, observer impressions, archival documents, and physiological measures to complement self-reports. There is a caution against assuming that non-self-reported methods are inherently more valid or objective, as biases can still exist in these alternative approaches.