The researchers were testing whether the selection of respondents with victimization experiences could be completed as effectively with a shorter version of the questionnaire, thereby reducing the time required to complete an interview, response burden, and cost. When the lifetime prevalence rates obtained by the two methods were compared, the shorter (French) version was found to have obtained lower overall prevalence rates (Killias, Simonin and de Puy, 2005). In addition to the draft survey instrument, experts should also be provided with information regarding the objectives of the study, the resources allocated to the study and the methodology of the project.