If you want to set a minimum and/or maximum for the answer choices of a multiple response question, you can do so in two different ways:
Minimum and maximum setting
When you have ticked the Minimum and maximum setting, two additional fields will be displayed: Minimum of selected choices and Maximum of selected choices. These fields allow you to limit the number of answer choices to be selected from the question by the participant. Suppose you select a minimum value of 2 and a maximum value of 4, then the participant cannot select less than 2 AND no more than 4 answer choices (here: cities) when filling out the survey. If he/she does so, an error message will be generated, informing the participant that he/she must adjust the number of answer choices selected to the minimum/maximum value defined, so that he/she will be able to proceed with the survey.
Note: You cannot edit the text of this error message.
Validation (professional user)
You also have the option of setting a validation for a multiple response question; you can then disregard the Minimum and maximum setting. To do this, you will need to add a validation element below the matrix question in the survey, once you have created the matrix question with its accompanying answer choices.
After adding this validation element to the survey, you can enter the text of the error message in the text box (1) on the right. After this, you can click the Edit conditions button (2) to specify the minimum and maximum number of answer choices from the question to be selected by the participant, e.g.
From the image above, you can deduce that the error message created will NOT be displayed (= Hide this validation message)
- If – Question – q1 – Number of selected options – greater than or equal to – 2
- And – Question – q1 – Number of selected options – smaller than or equal to – 4
This means that a participant cannot select less than 2 AND no more than 4 answer choices (here: cities) when filling out the corresponding survey. However, if he/she does, an error message will be presented, notifying the participant to adjust the selected number of answer choices to the minimum/maximum value specified in the filter, allowing him/her to proceed with the survey. This concerns the error message you have defined in the Error message text box.
The validation element roughly resembles the following in the survey (left side of the screen):