Strengths
• Quick way of obtaining data

• Normally receives a good response rate

• Screen respondents to be sure they qualify

• Able to control sample size and quota groups

• Easier to monitor and control interviews

• Interviewer can probe in detail and clarify responses

• Callbacks are easily made

Weaknesses
• Interview length must be kept under 30 min

• No visuals can be used

• Questions cannot be too long

• Questions cannot be too complex

• No rank order questions

Other Related Topics:
Telephone surveys
Additional information on telephone surveys
Determining sample size