comescore uses a panel of Internet users that is recruited using Random Digit Dialing (RDD), supplemented by sizable numbers of other panelists including, work and university panelists recruited online.
recruits download and install the software that enables comScore to monitor a households/work/uni Internet use
Instant Messengers have different behaviors than other digital applications. With Instant Messengers, comScore is able to count Unique Visitors and Duration by tracking the calls that a users Instant Messenger clients makes over the Internet. Unique Visitors for these IM applications are counted when the user launches the application, which is consistent with how other Digital Applications are reported. However, duration is not tracked until the user sends a message to another user. The send of the message is the starting point of the duration credited to the IM application, and the next URL request outside of the IM application is the end point of the duration credited to the IM application. Pages being credited to IM applications is limited to messages sent; messages received is similar in concept to pushed traffic (i.e., there was no user request).
comscore technology observes instant message packets transmitted to and from panelists machines and can detect the difference between when a user sends an instant message, and when information is forced to the users messenger application, (i.e. when a stock quote is automatically updated in an instant messenger application). comScore does not record the content of Instant Messages.
# Plus de détails
Posté par lezardbreton . En réponse au journal GTalk, le bide. Évalué à 4.
(vient d'un commentaire du site)
Une critique sur cette méthodologie, expliquant que ComsScore défavorise les utilisateurs connaisseurs de l'informatique : http://ontokyotime.com/2006/07/25/comscores-google-numbers-a(...)