In this thesis we present a framework for
investigating the interplay between user and system,
that we call productive interaction. The framework is
built into a model for both design and evaluation of
productive interaction of digital media. The model,
OPIL, is investigated through testing an
implementation of a digital game, designed on the
requirements of the framework. Results show that
the model must be used in conjunction with
considerations of target group and potentially flow
measures and that it can identify and categorise
productive interaction.