Lotte Philipsen at Århus University is interested in computer art and interaction. One of the theorists she relies on is Dominic McIver Lopes (A Philosophy on Computer Art, 2010). Work/display interaction (Lopes). Interactivity requires that the audience generates the display, explores the work, as well as attends to the work partly by attending his or her doing. Jens F. Jensen is the second theorist and he (The concept of interactivity - revisited: four new typologies for a new media landscape," Oct 2008) lists different types of interactivity: transmissional, conversational, registrational, and consultational.
Mogens Jacobsen's glemsel.net
Rafael Lozano-Hemmer's Pulse Room (light bulbs hanging from the ceiling)
Ludic Society: ToyGenoSonic (bar codes generating sound)
Ben Rubin & Mark Hansen: Listening Post
Her material was taken from the digital art exhibition at ARoS, Enter Action - Digital Art Now in 2009. She describes glemsel.net as conversational interactivity, Pulse Room as registrational interactivity, ToyGenoSonic as consultational interactivity and Listening Post as transmissional interactivity.