A combined remote control and data logging unit for use as a market research tool in assessing consumer preferences with respect to television and other audio-visual entertainment sources, as well as purchasing behaviour. The device includes a microprocessor controlling the usual remote control functions, and also memory means for recording channel changes and the like so as to track the user's pattern of viewing. In addition dedicated input devices such as light pen/bar code readers may be incorporated for identifying product purchases as well as at least one rotary encoder for making menu selections or entering program appreciation ratings.
