The Questionnaire Another difference is the questionnaire. A professionally designed and written telephone interview questionnaire script is very different in style and strategy than a printed survey questionnaire. Special attention must be paid to this aspect of a tele-survey project. A poorly written questionnaire script will be difficult to administer and can turn-off participants. Length Interview length can also become an issue.
People become more impatient on the telephone than when responding to a printed survey.
In general, survey respondents have less patience today with long questionnaires. Experience tells us that telephone survey interviews should not exceed 25 minutes. Pulse Research Pulse research is a quick, in-depth series of telephone interviews designed to acquire information about one or more groups' opinions, perceptions, attitudes, concerns and needs. Depending upon the number of segments to be interviewed and the topics to be covered, a dozen interviews might suffice in one case while seventy-five or a hundred interviews might be required in another. Interviews of this kind are usually conducted by experienced research professionals.