The validity and reliability of the interviews and surveys can easily be distorted if the measuring instrument is inappropriate. in view of this highlight the major differences between interviews and self administered questionnaires. 1.in doing so indicate some of the challenges related to the implementation of these data collection tools validity addresses the issue of whether researchers are actually measuring what they has set out to do. there are four specific types of validity each of which the researchers would ideally want to establish for research instrument prior to administering it for the actual study. in light of the above, indicate the type of validity that describes the statement given below - this type includes statistical tests and logical argument - this type involves a group of people and content related evidence - a potential challenge with this type is that one may fail to formulate the criteria to be used before actually checking the scores - one challenge with type is that people may be biased in terms of their judgment