In general, appendices do not count towards your total amount of words so it is a useful way of including material without taking up space that can be used for other information. However, do not try filling up your report with irrelevant appendices as this will not impress examiners. When including material you must make sure that it is relevant- ask yourself whether the examiner will gain a deeper understanding of your work by reading the appendix. If not, leave it out. Other information which could be included as an appendix are recruitment leaflets or letters; practical details about each research participant; sample transcripts (if permission has been sought); list of interview dates; relevant tables and graphs or charts which are too bulky for the main report.