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

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Do you own an IBM-type of PC?<br />

Yes<br />

No<br />

Do you own an Apple computer?<br />

Yes<br />

No<br />

Do you own both?<br />

Yes<br />

No<br />

Do you own neither?<br />

Yes<br />

No<br />

A Good Question Has Mutually Exclusive Options<br />

A good question leaves no ambiguity in the mind of the respondent.<br />

<strong>The</strong>re should be only one correct or appropriate choice for<br />

the respondent to make.<br />

For example, a question like “Where did you grow up?” could<br />

have the following answers: (A) Farm, (B) Country, and (C) City.<br />

A person who grew up on a farm in the country would not know<br />

whether to select choice A or B, and a person who grew up in the<br />

suburbs may have no appropriate answer. This question would not<br />

provide meaningful information. Furthermore, it is unclear what is<br />

meant by “grow up.” If respondents were born on a farm but moved<br />

to the city in the sixth grade, where did they grow up? <strong>The</strong> response<br />

alternatives must contain all possible meaningful answers.<br />

A Good Question Produces Variability in Response<br />

When a question produces no variability in responses, we learn very<br />

little. If a question is not sensitive enough to detect actual variability,<br />

we will be unable to perform any statistical analysis on the item.<br />

Consider the following example:<br />

What do you think about this instructor? (check one)<br />

It’s the worst course I’ve ever taken.<br />

It’s somewhere between the worst and best.<br />

It’s the best course I’ve ever taken.<br />

ASKING QUESTIONS FAQS 327

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