A computer graphical tool for analyzing user reaction to video‐tex systems Available to Purchase

The INVIDO system is a graphical tool which was designed and implemented for studying user reactions to videotex systems. For different themes, including weather reporting, sport results and winning numbers in lotteries, different visual presentations have been created. As home visual information systems will invade the market in the next few years, it is essential to develop new tools which can give an idea of the user's reaction to this kind of information. The entire methodology (graphics capabilities, implementation and investigation) is presented. Numerous examples are also given.