Determines whether a visual stimulus is can be dragged and dropped on the screen.
<button> <clock> <picture> <shape> <text> <video>
A value of true (or 1) indicates the stimulus is a valid dropsource. A value of false (or 0) indicates it can not be dragged and dropped. Valid drop sources can be dragged and dropped onto other visual stimuli marked as <a href="isdroptarget.htm">drop targets</a>.
The following displays the value of dropsource in a text stimulus:
<text sometext>
/ items= ("dropsource = <% text.sometext.dropsource %>")
</text>
The following displays the value of dropsource in an instruction page:
<page somepage>
dropsource = <% text.sometext.dropsource %>
</page>