Personal Learning Environments for Overcoming Knowledge Boundaries between Activity Systems in Emerging Adulthood

In this paper we suggest a possible answer to the question on why Social Network Systems (SNSs) are important for bridging social capital and for knowledge construction during emerging adulthood. We argue why web social artefacts 2.0, and particularly those defined as Personal Learning Environments, which consider also SNSs, could be more effective than web artefacts 1.0, such as those defined as Virtual Learning Environments (mainly represented by classical web platforms and web forums), for overcoming knowledge confines between activity systems during transitions in emerging adulthood.