Pre-defined descriptor or measurement questions or items are presented to a user or operator using a computer with a storage and a display for use in systematic observation and assessment. Measurement items that are used in the course of observation and assessment are automatically correlated with address data that is associated with a track of simultaneous digital recording so as to automatically generate meaningful indexes for the recorded material. Based upon the contents of the measurement questions or items, including any qualitative or quantitative descriptions or numerical rating results from use of the descriptors or measurement items, the indexes can readily be further processed, providing the capacity for improvements in efficiency, consistency, and accuracy in retrieving and utilizing the recorded material. The method is particularly useful for processes relating to systematic interview or assessment methods, including the training and monitoring of interviewers or assessors and the storage, retrieval, analysis, and other manipulation of recordings.