I´ve come across to researchers that use these kind of methods: Kristen Ali Eglington, ( http://www.dwrc.surrey.ac.uk/profile-kristeneglinton.shtml) Daniel Meirinhos, project Olhares em Foco | In Focus ( http://olharesemfoco.wix.com/<http://olharesemfoco.wix.com/projecto#%21__in-focus/contatos> ) Regards Ana >