Samples are not always selected to be representative of wider populations. Indeed, sometimes the sample for a study is deliberately chosen not to be representative and “typical”. So in their study of teaching using new technologies, de Winter, Winterbottom, and Wilson (2010, p.262) reported that the participants were all mentors in schools working in an initial teacher education partnership, who “take responsibility for supporting the (learning) of trainee teachers on professional placement in their school”,and that they selected participants who “had an existing interest or expertise in using a particular “new” technology in the classroom”.