From A for AGF Videoforschung to Z for zapping, the most important technical terms in video research are explained here.

The universe of the system of AGF is persons aged three and above in private households with a German-speaking main income person and at least one device for the use of video.


USB is an acronym that stands for Universal Serial Bus. It refers to a standard for the connection of external devices such as hard drives or USB sticks to computers and modern TV sets.

Weighted number of persons or households that have fulfilled a minimum usage condition for an evaluation element. Regardless of the frequency of contact, a user is only counted once.

User-centric measurement is an approach to measuring audience reach. The measurement refers to the user groups of media and is mainly carried out as a panel-based measurement approach.