Abstract
In this study, a video excerpt of two boys working on a mathematical open-ended problem
is discussed. In the video, affective and social factors overrule development of logical
thinking. Analysing such an episode is challenging, as appropriate tools are few. This study
elaborates the video excerpt to find out what affective, cognitive and social phenomena
exist in the episode, aiming to develop an analysing tool for such purpose. In addition, a
framework called Patterns of Participation will be adapted to test its purposefulness to the
analysis. As a result, it was found out that most of the essential features of the episode
were revealed. However, it is suggested including theories of emotions, student
engagement and positioning would make the tool more profound.