A researcher wants to observe the social structure of a youth gang. When collecting data, she is most likely to use what type of method?

Qualitative

Explanation:

Qualitative method: In psychological research, the qualitative method is defined as a method that is being used to get an understanding of basic underlying opinions, reasons, and motivations. It gives the researcher or the experimenter an insight into the different problems and to create a hypothesis for a particular research.

It includes in-depth interviews, focus groups, surveys, observations, etc

Groups involved in the qualitative method are phenomenological, case study, narrative, grounded theory, and ethnography.