Operationalising concepts can be particularly difficult when creating a questionnaire for pupils because their grasp of abstract concepts is generally less than that of adults
Parents are harder than pupils or teachers to locate and contact, so using the school to distribute questionnaires is an effective way to overcome this difficulty
Younger children in particular are more open to peer group pressure and it is difficult to prevent pupils who are completing questionnaires that have been distributed in class from discussing responses
A questionnaire that does not involve the researcher being present when it is completed may help to overcome the problem of status differences between adult researcher and younger respondent
Schools may be reluctant to allow sociologists to distribute questionnaires because of the disruption to lessons or because they object to the researcher's chosen topic
When questionnaires are conducted in schools, response rates can often be higher than in other areas because the head's consent and authority may put pressure on teachers and pupils to cooperate
Children generally have a shorter attention span than adults, so questionnaires need to be relatively brief if they are to stand a chance of being completed
Children's life experiences are narrower and their recall different from those of adults, which may mean that pupils, particularly those of primary school age, do not actually know the answers
Schools have very active informal communication channels, so the purpose and questions of a questionnaire may become known throughout the school before all participants have been given it, affecting the validity of the data
Teachers are well-educated professionals who may be able to analyse the pattern of questions and recognise the researcher's aims and intentions, then adjust their answers accordingly, producing invalid data
Questionnaires can be particularly useful when researching sensitive issues like bullying, where anonymity may overcome pupils' embarrassment or fear of retribution
Much depends on whether pupils are reassured that their anonymity will be safeguarded, which may be difficult to achieve with such a detached method as a questionnaire
Interpretivists reject questionnaires as a means of researching pupils because the lack of contact with respondents makes rapport difficult to establish, and young people may be less likely to give full and honest responses
Pupils, particularly those in anti-school subcultures, may refuse to cooperate or take the questionnaire seriously if they equate it with school and teacher authority, resulting in incomplete or invalid data
Compared with face-to-face forms of research such as interviews, it is easy to make questionnaires anonymous, which may allow teachers to give more honest answers to sensitive questions