According to good test administration, no, question booklets should not be sent to a respondent by mail. This is an ethical issue and it is recommended that the tests be kept safe. This is because respondents can make copies of the test materials and distribute them out to the general public. If the general population becomes familiar with the test, then it will become invalidated. Access to test materials should only be given to qualified test administrators. Respondents should not be allowed to take test materials home and testing should never be undertaken by post. There are specific instructions which have to be followed when administering a test, and if testing is done by post, then the validity of the test decreases. Furthermore, we cannot be certain that the respondent self-administers the test in a standardised manner and this will impact upon the reliability and validity of the test.