As can be inferred from our application descriptions, no gamification
strategy was applied to foster user participation. The main
reason was that, being these the first participatory sensing activities
the research group managed, the authors considered important
– at least as a starting point – to evaluate the results in the
most basic approach where users voluntarily contribute data – perhaps
in response to a call, but without any incentive or prize
derived from a game-driven approach. With this premise, results
show that user participation in VGI projects similar to those
described is highly dependent on the number and the kind of their
expected users as well as their duration.