Fortunately, the comScore panel provides visibility into all events that a user is conducting and all the HTTP calls associated with the user’s actions. Based on this insight, we have developed a priority scoring system that allows us to identify search results with explicit user action and interstitial results with a sufficiently long pause to suggest some level of implicit engagement. User actions that qualify an explicit query include those where a user hits “enter,” clicks on an algorithmic or sponsored result, clicks one of the various refinement links (such as past 24 hours, etc.) or clicks on a vertical search tab to execute the query in a different channel (such as News or Image Search). Any query with such explicit action is counted in Explicit Core Search. Query result pages without explicit user action, but with a pause of at least 3 seconds, are considered as indicating ‘implicit’ engagement and will count towards Total Core Search.