The collection of options in a multiple choice survey question.
<checkboxes> <dropdown> <listbox> <radiobuttons>
This is a collection property.
The following displays the value of option in a text stimulus:
<text sometext>
/ items= ("option = <% checkboxes.foo.option.1 %>")
</text>
The following displays the value of option in an instruction page:
<page somepage>
option = <% listbox.bar.option.1 %>
</page>