Critical and electronic literacy in this context mean helping students develop skills that bridge the potential gaps in their ability to use their informal media skills for learning that is engaging while being focused on the task at hand.
The presenters propose to use the term ergonomic approach to CALL design - by which they want to draw attention to focusing on learners' needs when designing learning tasks with conditions that give learners opportunities for interaction with the tool that is used. I see that I am not being very clear here.... sorry. I was trying to say that the presenters in a way want to combine the interactional affordances of a certain tool while having the task design and the learner needs in mind. All the while with an underlining emphasis on the proecess, not so much the outcome. The tool the have used in their research can be found at http://francotoile.uvic.ca
The presenters also make a very valid point on the methodological issues. That along with the quantitative, you need the qualitative. And not only as a one off setting, but with a longitudinal, process-oriented approach in mind. For this they have found design-based research (DBR) as a useful approach as it embeds and itinerative ideology of development oriented research while also allowing various participant roles.
This research seems to make a lot of sense and is ambitious enough to create new approaches and ideas for us all to benefit from.