Validity is based with the degree of achieving the intended result. A result is valid if it achieves what it was supposed to achieve. Validity determines the success of a study or research. Validity is measured in terms of desired output or goal. When such a goal is not fixed there are problems in ascertaining the validity of a result. According to Alan Bryman, there are four types of validity-
Factors influencing validity
In most sociological investigations, validity is not clear. While positivists may argue that validity is possible in sociology by the use of scientific methods, interpretivist deny such possibility, as human consciousness cannot be captured using any method. According to Interpretivist, most of the sociologists tend to ignore the problem of validity by spending time accumulating more data and devising more sophisticated theories to claim valid outcomes. Some sociology researchers have suggested that sociological research should be judged on the basis of some different criteria.