IM 2 Level of participation did not differ much from previous findings [Horowitz, 2006] 3 Standard features of Facebook were not sufficient to properly instrument all IM activities 4 The use of real identity was highlighted as potentially problematic in some situations. Possible solution: add actions links to posts 5 Make sense of people’s contributions was hard. Possible solutions [Jara et al., 2013, Baez et al., 2012]