“…The concern about vulnerability becomes particularly significant in the case of research with children and adolescents whose vulnerability might be increased because of factors like serious illness, disability, mental health issues, abuse, sexual orientation or personal and social circumstances (Bogolub and Thomas, 2005;Cocks, 2006;Cuskelly, 2005;Fontes, 2004;helgeland, 2005;hoop et al, 2008;Kennedy, 2006;Scott et al, 2006;Solyom and Moreno, 2005;Thomas and O'Kane, 1998;Thompson, 1990;Valentine et al, 2001;Yan and Munir, 2004). historically, many cases of children's research have been conducted with particularly vulnerable groups of children and concerns about their exploitation are understandable in this context (Lederer and Grodin, 1994;Lederer, 2003).…”