From A for AGF Videoforschung to Z for zapping, the most important technical terms in video research are explained here.
The random-route method is a multi-stage selection method used for the recruitment of panel households for specified sampling points under which the interviewers are given exact start addresses for each point with a detailed route plan. The households to be contacted are then determined by means of a pre-defined random procedure. Since the beginning of the corona pandemic in 2020, the procedure has been supplemented by the initial telephone contact (CATI) to determine households willing to participate, which also takes into account random sampling (Dual-frame).
Rate types assign commercial breaks to different categories that define the type of advertising. Rate types can be standard rates, event rates or special rates. They are part of the eight-digit commercial break code.
Ratings refer to the average market share of households who watched a programme at a given time. Ratings are stated in percent.
AGF distinguishes between four different reception levels: IPTV, satellite, cable and terrestrial. A household is assigned to a level hierarchically, meaning that if more than one reception level is present, a household is always assigned to the highest level, IPTV being the highest level, followed by satellite, cable and terrestrial. Therefore, a household that receives programmes via IPTV is always assigned to the IPTV level even if other reception options are available in the household. According to AGF’s definition, the satellite level includes all households that receive via satellite, but not via IPTV. A household is assigned to the cable level if it receives via cable, but not via IPTV or satellite. Thus, the terrestrial level only includes all households that only have a DVB-T reception possibility.
Reception levels are taken into consideration for both recruitment and weighting. Regardless of the assignment of a household to a reception level, the other available reception levels in the household are also entered into the AGF system by the technician and form part of the AGF data.
Reception potential indicates the number of persons or households who receive a broadcaster via terrestrial transmission, cable, satellite or IPTV. A broadcaster is deemed to be receivable if it was switched on at least once for one second in a panel household. By virtue of this definition, the reception potential of a broadcaster is always smaller than its technical range because actual reception, not all potential households in the distribution area, forms the basis for the reception potential.
Although the reception potential is largely resistant to fluctuations by reason of its definition, slight changes can arise in a few cases as a result of panel entries and exits, maintenance, cable network or transponder switch-offs or reassignments, and weighting processes.
Reception potential 60/60 indicates the number of persons or households that switched on a broadcaster for at least 60 consecutive seconds in the last 60 days. Thus, the reception potential 60/60 is subject to temporal fluctuations based on actual use.
The hybrid recruitment method by random route and quota is used for recruiting households for the AGF Panel. In both methods, it is first determined whether the household satisfies the target specifications for the AGF Panel with respect to socio-demographic characteristics and the reception situation. If a household is deemed suitable, a recruitment interview for the AGF Panel is conducted. In a recruitment interview, additional information about the household is collected in a manner similar to the Structural Survey. After recruitment, the measuring technology is installed (see Installation) and the household is included in the daily reports.
A red button application is an automatically executed application within the meaning of the HbbTV standard. It is transmitted together with a broadcast programme and launches in the background insofar as it is signaled as “auto start.” These applications often display a red button on the screen, indicating that the application can be activated and visibly displayed by pressing on the red button. Such an application is typically the portal site of a broadcaster that provides additional information and services to the viewer such as access to a media library.
The reporting basis refers to the number of all persons – weighted (potential) or unweighted (number of cases) on which an evaluation is based. These persons usually represent the universe of the AGF Panel, but they can also be a smaller group, depending on the definition. In evaluations, the reporting basis acts as a prefilter for the target group.
The reporting ratio refers to the proportion of all retrievable panel households represented by reporting panel households whose data is transmitted every day, usually overnight between 3:00 a.m. and 5:00 a.m., via the measurement systems to the central system at GfK. The minimum number for successfully daily reporting households is 5,400.