The study entitled: " Media, multimedia and interactivity: role plays and semiotic issues " consists in analyzing interactivity under the scope of semiotics, through a two-dimension problematics: a) inter media: in relation to on-line mass media (radiophony, television, internet) b) intra-media: in relation to the Internet device. A reflection about the ways how electronic texts are implemented, and which semiotical consequences concerning the receptive action process are at issue, underlies those two dimensions. It follows that the reflection leads to some considerations concerning the practice of media aspects of Internet through its ideological as well as praxaelogical dimensions. Last, since the whole study is inspired by the question of belief trials, it treats of the axiological contract put right at the center of mediation by new media.