The document discusses various survey techniques used in descriptive research designs. It describes survey methods like telephone interviews, street interviews, and computer-assisted interviews. It covers the administration of questions verbally, in writing, or via computer. Some key pros of surveys include them being simple to administer, having consistent data, and being cost-effective. Potential cons include respondents being unwilling to provide information and errors from unclear questions. The document also discusses different interview formats like personal, mail, and electronic interviews. It provides examples of response rates and costs for some countries. Finally, it outlines factors to consider for evaluating which survey techniques are most appropriate for different situations.