What is one alternative method to estimate reliability without multiple observers?

Correlating ratings from a single observer over time is an effective method to estimate reliability because it assesses the consistency of the observer’s judgments across different instances. This approach relies on the premise that if an observer is reliable, their ratings should demonstrate stability and similarity when measuring the same phenomenon at different times. By analyzing these repeated measures, one can discern if the observations are consistent, thereby providing a form of internal reliability assessment.

The other options, while they may have their merits in different contexts, do not specifically focus on estimating reliability from a single observer's perspective. Examining data across different organizations might reveal variances in practices or outcomes but doesn’t specifically relate to one observer's reliability. Using video recordings for analysis could help review observations and possibly enhance training or inter-rater reliability but does not directly provide a metric of reliability for a single observer's consistency. Conducting interviews for subjective assessment is more qualitative in nature and doesn’t yield quantitative measures to assess reliability.