Finally, as an additional indication of construct validity, the CORMAS scores were found to differentiate between different memory conditions, yielding for example lower scores for reports provided after a longer delay between exposure and testing, and lower scores for the reports of subjects exposed to "contaminating" post-event misinformation relative to control subjects who were not exposed.
The main conclusions from the CORMAS strand of the project can be summarized as follows:
The CORMAS procedure yields reliable and valid memory scores which capture both the overall amount of correct information (number of correct statements) scores and a more global evaluation of the overall correspondence between the contents of a free-narrative memory report, and the original events and details that actually occurred.
The CORMAS method is standardized, in the sense that it involves a minimal amount of human intervention (in the production of examples and counterexamples), and is quite robust across minor variations in the nature of this intervention.
CORMAS provides a new and convenient research tool that can be used to evaluate the overall quality of free-narrative memory reports in a standardized and reliable way.
We found that several of the QAP measures that were based on a particular participant's memory and metamemory performance on a word-list study task and on a task involving memory of a different crime film could in fact be used to predict the quality of that same participant's free-narrative account of the criterion crime episode, indexed by the CORMAS score assigned to that text.