The document discusses different types of interviews that can be used for research data collection. It describes personal interviews, telephone interviews, focus group interviews, depth interviews, and projective techniques. Personal interviews involve face-to-face communication between an interviewer and respondent. They are generally structured with questions planned in advance. Telephone interviews collect information by asking respondents questions over the phone. Focus group interviews involve a moderator leading a discussion among a small group of respondents. Depth interviews are nondirective and give respondents freedom to answer openly. Projective techniques indirectly reveal responses through interpretation of ambiguous objects or activities.