In Xorro-Q, engagement is measured through comparing answer counts to question counts. The idea is to judge to what extent an individual or an audience chooses to participate, by answering questions when these are offered. Each Question Impression is one opportunity to participate; each Answer is that opportunity taken.
This approach is applied to an Engagement Scale reflecting the degree to which an attending participant commits to answering questions offered. This scale starts with "initiating", followed by "participating", and then "engaging".