can I make .change work on dropdownlist before leaving the dropdownbox?

can I make .change work on dropdownlist before leaving the dropdownbox?

 $("#ddlPrimaryCarePractice").change(function(){
               if($("ddlPrimaryCarePractice :selected").text()=="Other")
               {
                    $("#txtPCP").removeAttr('disabled');
               }
               else
               {
                     $("#txtPCP").attr('disabled', true);
               }
           });

The above function seems to work just fine when the user clicks through the form and fires the event like I would expect. 

However, if the user is hitting the arrow keys to switch the selected value in the dropdownlist, the event does not fire until the user tabs away from the box, even if they've changed the value multiple times.

Is there a way to force it to fire the event for every change of the value, even if the focus hasn't moved away from the box? 

Thanks in advance!