During the Los Angeles data collection of the Ferguson et al. (2012) study, the researchers conducted three focus groups. In order to assess a “broader range of employment perspectives,” the researchers held focus groups with individuals from the agency’s Emergency Overnight program, Crisis Shelter, and Rites of Passage program (391). How would you best describe the sampling method used for the Los Angeles focus groups?
a. cluster sampling
b. probability sampling
c. availability sampling
d. quota sampling
e. purposive sampling