This thesis focuses upon the effect of some factors on pupils/students responses in some assessment methods mainly fixed response questions. The research was carried out over three years and the samples were selected from secondary schools both in Scotland and the First Year University of Glasgow students who were taking biology and chemistry courses. The results of the first investigation showed that changing the positions of the key answer and the most plausible distractor (strong distractor) in the multiple choice questions (MCQs) it can have a significant effect in the facility value of...