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Asking Questions - The Definitive Guide To Questionnaire Design ...

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156 ASKING QUESTIONS<br />

time to get their thoughts in order and then express them fully on<br />

a topic. <strong>The</strong>y can be rushed along only at the cost of losing considerable<br />

amounts of information.<br />

Using open-ended questions requires greater interviewer skill<br />

in recognizing ambiguities of response and in probing and drawing<br />

respondents out, particularly those who are reticent or not highly<br />

verbal. This aspect of the open-ended format has made some investigators<br />

wary of its use except in situations when they have the<br />

time and money to provide well-trained and well-supervised interviewers<br />

and coders. Open-ended response formats may work<br />

better with telephone interviews, where close supervision of interviewer<br />

quality can be maintained, although there is evidence that<br />

shorter answers to open-ended questions are given on the telephone<br />

(Groves and Kahn, 1979). No matter how well controlled<br />

the interviewers may be, however, factors such as carelessness and<br />

verbal facility will generate greater individual variance among<br />

respondents than would be the case with precoded questions.<br />

<strong>Questions</strong> concerning age, state of residence, or credit-hours<br />

earned may be more easily answered by filling in blanks than by<br />

selecting among categories. If the answers are numerical, an openanswer<br />

response mode can enhance the power of inferential statistical<br />

procedures. Even if these handwritten answers are eventually<br />

assigned to categories for analysis, there is more flexibility in determining<br />

what categories can be used. If estimates are being taken<br />

(such as distance to work or weight), however, it is usually better to<br />

offer response categories.<br />

Using Closed-Answer Formats<br />

A closed-answer response is recorded in predetermined categories<br />

selected by respondents or the interviewer as appropriate. <strong>The</strong>se<br />

involve a wide range of questions, including those that ask respondents<br />

to check the box or circle the response that is most appropriate.<br />

For closed questions, a distinction is made between

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