● Focus group discussion
- General Group with 7-8 people
- Mini-Group with 4-5 people
● In-depth interview
● In home visit
● Ethnographic study
● ……

● Face to Face Interview
Street intercept
- CLT
- Pre-recruitment
- Computer-aided personal interview (CAPI)
·Telephone Interview
- Web base telephone interview
- Computer-aided telephone interview (CATI)
- Paper & pencil telephone interview
● Pre-recruitment Online Survey
● Mystery Shopping Study
● ……

● Online Questionnaire
● Bulletin Board
● Online Communities
● Online Focus Groups
● ……