A useful method for practicing critical thinking in a group consists of starting a parallel thinking process based on role play. This method allows us to easily examine a hypothesis from different angles. 

Upon a specific topic or issue, each student (or couple or sub-groups in equal number) is assigned a role to play, a different position to advocate. Suggestions about the role to be played are:

• Neutral position: the person expresses only the facts, with simple points, short and informative, without giving any opinion.
• Position in favour: the person expresses positive opinions, underlying the advantages and benefits of an idea.
• Position against: the person expresses negative opinions, emphasising the risks and dangers.
• Devil’s advocate: the person counterattacks the expressed positions in favour and against.
• Creative perspective: the person looks for ideas outside the box, alternative options.