Test your radio adverts in a discrete manner, by exposing respondents to them as part of a radio broadcast . As often occurs when listening to the radio, participants carry out other tasks at the same time, we therefore create an element of distraction for respondents. 

Expose your respondents to a radio program containing one un-branded and one branded advert. This enables a calculation to be made of brand recognition and attribution in the case of the unbranded ad, and of brand preference and ad diagnostic in the case of the branded one.