The interviewer can select Yes, No, Don't Know or N/A as an answer to this type of question.
Adding a Yes/No Perceptual Question
You may specify a specific answer to jump to in the case of either a Yes or No response. If you don't specify a specific skip (the True and False forks), the questions will continue in their normal sequence. However, you may wish to skip one or more subsequent questions, based on how the respondent answers this question. Here's what we're doing with the settings displayed in the screen shot above:
20 "Do you own a CD player?" True fork: 30 False fork: 40
30 "How many CD's do you buy a month?"
40 "What station is getting better?" etc...
In this example, you only ask the respondent how many CD's they buy each month (Question 30), if they own a CD player (they answered Yes to question 20). If they don't own a CD player (answered No to question 20), they are re-directed to question 40, which begins a new line of questioning.
In addition, you may specify a fixed Next Question to jump to, if you want to skip to an alternative branch of questions.
20 "Do you listen to the Joe Blow Show?". True fork: 30 False fork: 100
30 "What do you like most about Joe Blow?"
40 "What do you like least about Joe Blow?"
50 "Would you listen to Joe Blow on Saturday". Next Question: 150
100 "Have you ever heard of Joe Blow?"
120 "What have you heard about the show?"
130 "Why haven't you ever listened?"
150 "What station plays the most music?"
As you can see in this example, using the Next Question parameter on Question 50 skips over the line of questions you would ask someone if they answered No back on Question 20. This feature allows true skip patterns and branching, bringing all respondents back together at some point later in the survey.
You only have to indicate a Next Question if you want to skip to a question other than the next sequential question.
The perceptual survey will continue in sequence, unless you have specified a different Next Question to jump to.
When reports are compiled, you will see the results for all answers, as well as percentages for Yes, No and Don't Know as a percentage of all answers given. Any responses of N/A are not compiled as part of the results. A non-response, or non-applicable answer does not count as part of the sample. However, if a respondent is not able to answer a question either Yes or No, or isn't sure or doesn't have an opinion, the interviewer should then record that answer as Don't Know (rather than N/A).
In addition to using the simply Yes/No True/False forks, you may set up more elaborate and complex skip patterns, even AutoFilling answers to subsequent questions, by using the Perceptual Rules.