There are three main methods of administering survey questionnaires to a sample of respondents: self-administration, in which respondents are asked to complete the questionnaires themselves; interview administration, in which surveys are administered in face-to-face encounters; and administration by telephone. The most common form of self-administered questionnaire is the mail survey.

Crystal is studying beliefs about nutritional supplements. She decides to send out a questionnaire by mail. She sends it out with a letter of explanation and a self-addressed stamped envelope for returning the questionnaire.

Which of the following are things that Crystal could do to increase response rates?Check all that apply.

The researcher could include the phone number of the research office on the questionnaire so that respondents could call the office if they misplace the questionnaire.

A research worker could visit the home of the respondent to pick up the questionnaire and to check it for completeness.

The researcher can send follow-up letters to anyone who has already responded to the survey.

Nonrespondents can be sent a new copy of the survey questionnaire with a follow-up letter encouraging them to participate.

The number of people participating in a survey divided by the number selected in the sample, in the form of a percentage, is called the (cooperation rate / contact rate / refusal rate / response rate).

A return rate graph is an invaluable tool for monitoring questionnaire returns. The day on which the initial questionnaires were mailed is labeled Day 0 on the graph, and every day thereafter the number of returned questionnaires is logged on the graph in blue.

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