structured
each interview is presented with exactly the same questions in the same order
semi-structured
has a set of questions to ask but can be more freely with the questions
un-structured
don’t have a set pattern of questions and don’t arranged in advance
group
asks questions with a group of participants and not just one
strengths
qualitative data: more information and richer
can build a trusted relationship
weakness
time consuming
can’t compare data as easily unlike quantitative data
can’t find a certain pattern