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The concept of social presence proposed in studies on communities of inquiry has highlighted both the importance and the challenges of integrating aspects such as affective and relational expressions among team members while solving collaborative learning tasks, in order to advance in a global comprehension of learning processes. This paper presents a theoretical and methodological proposal for tackling this issue from a socio-cultural perspective by analysing the participants' discourse in relation to expressions of selfcompetence (at an individual and group level) concerning the task and group cohesion (task cohesion and social cohesion). This proposal's potential is illustrated by the empirical results of a case study that analyses social presence during a collaborative work task by university students using the Moodle learning platform. [ABSTRACT FROM AUTHOR]

This paper presents a study which aims to validate a scale for assessing the impact of Web 2.0 in education. From a structural perspective, we evaluate the influence of various factors (Training, Attitude and Use of Web 2.0) on the Impact of Web 2.0 in education with a sample of 403 students from different degrees of the University of Huelva, applying a Likert scale constructed for this purpose. To analyse the psychometric properties of the scale, we conducted a Chronbach's Alpha reliability test and factor analysis. To validate the theoretical construct, we conducted an analysis according to structural equation modelling, which enabled us to confirm the influence of training, attitude and use on the Impact of Web 2.0, and to observe how the factors interrelate and influence each other. We conclude that the existence of a training plan is not enough in itself and that, rather, it is the approach taken to Web 2.0 and the use made of it that has more influence on its educational impact. [ABSTRACT FROM AUTHOR]