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

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326 ASKING QUESTIONS<br />

<strong>The</strong> purpose of a survey is to find out information. A question<br />

that asks for a response on more than one dimension will not always<br />

provide the information you are seeking. Each question should be<br />

about one topic. Do not include questions that require a single response<br />

when two would be more appropriate. For example, “Do you<br />

agree that smoking and drinking are detrimental to health?” should<br />

be broken into two different questions, as should “Do you like the<br />

texture and flavor of the snack?” If a respondent answers “no,” then<br />

the researcher will not know if the respondent dislikes the texture<br />

or the flavor or both. A good question asks for only one “byte” of<br />

information.<br />

A Good Question Can Accommodate<br />

All Possible Answers<br />

Multiple choice items are the most popular type of survey questions<br />

because they are generally the easiest for a respondent to answer<br />

and the easiest to analyze. <strong>Asking</strong> a multiple choice question that<br />

does not accommodate all possible responses can confuse and frustrate<br />

the respondent, however. (See Chapter Five.) For example,<br />

consider the following question:<br />

What type of computer do you own?<br />

IBM-type PC Apple<br />

Clearly, there are many problems with this question. What if<br />

the respondents don’t own a computer? What if they own a type<br />

of computer that is neither an IBM-type of PC or an Apple? What<br />

if they own both an IBM-type of PC and an Apple? <strong>The</strong>re are two<br />

ways to correct this kind of problem. One way is to ask respondents<br />

to list all of the computers they own. Another way would be<br />

to allow “neither” or “both” as answers. If we assume for the purposes<br />

of our example that the only types of computers are IBMtype<br />

computers and Apple computers, our question might read as<br />

follows:

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