IAR: ComScore Admits Measurement Flaws
Oops…
ComScore Media Metrix said on Monday it had discovered flaws in its measurement methodology, causing it to revise its site counts for October through December 2002.
The company said the methodology it introduced in October undercounted at-work users, with the restated figures causing some sites' traffic figures and duration-of-visit data to increase sharply. Also, ComScore altered its counting of some ad-supported software, such as AWS Convergence Technology's WeatherBug.
