One way of identifying sessions by looking at this data is to build a map of the website: if the user's first page can be identified, the "session" of actions lasts until they land on a page which cannot be accessed from any of the previously-accessed pages.
#A SESSION DEFINITION FULL#
Navigation-oriented approaches exploit the structure of websites - specifically, the presence of hyperlinks and the tendency of users to navigate between pages on the same website by clicking on them, rather than typing the full URL into their browser. This has the problem of assuming that the thresholds follow a bimodal distribution, and is not suitable for datasets that cover a long period of time. One alternative that has been proposed is using user-specific thresholds rather than a single, global threshold for the entire dataset. Others simply state: "no time threshold is effective at identifying ". Some have argued that a threshold of 30 minutes produces artifacts around naturally long sessions and have experimented with other thresholds. A common value for the inactivity threshold is 30 minutes and sometimes described as the industry standard. Further requests from the same user are considered a second session. Time-oriented approaches to session reconstruction look for a set period of user inactivity commonly called an "inactivity threshold." Once this period of inactivity is reached, the user is assumed to have left the site or stopped using the browser entirely and the session is ended. Approaches to session reconstruction can be divided into two main categories: time-oriented, and navigation-oriented. This is known as "session reconstruction". Session reconstruction an illustration of the different criteria used by different session reconstruction approaches.Įssential to the use of sessions in web analytics is being able to identify them. Sessions are also used for operational analytics, data anonymization, identifying networking anomalies, and synthetic workload generation for testing servers with artificial traffic. Reconstructed sessions have also been used to measure total user input, including to measure the number of labour hours taken to construct Wikipedia. Session length is seen as a more accurate alternative to measuring page views. Other metrics used within research and applied web analytics include session length, and user actions per session. Sessions per user can be used as a measurement of website usage.
#A SESSION DEFINITION SERIES#
A session or query session may be all queries made by a user in a particular time period or it may also be a series of queries or navigations with a consistent underlying user need.
In the context of search engines, "sessions" and "query sessions" have at least two definitions. Generally, a session is understood to consist of "a sequence of requests made by a single end-user during a visit to a particular site". The definition of "session" varies, particularly when applied to search engines. There are two primary methods used to define a session: time-oriented approaches based on continuity in user activity and navigation-based approaches based on continuity in a chain of requested pages.
Sessions are also used in operational analytics and provision of user-specific recommendations. In web analytics, a session, or visit is a unit of measurement of a user's actions taken within a period of time or with regard to completion of a task.
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