There are a lot of problems that can affect the usefulness of interviews such as interviewer bias the interviewer will affect the answers of the respondent and if people don't tell the truth then the data will not be valid. It is difficult to analysis the data collected from unstructured interviews because people give many different responses to questions asked so it is difficult to compare the data with other interviews. Most modern pieces of research use more than one method so the researcher can combine unstructured interviews with structured interviews or another type or research method.…
