Delay the trigger of SSI_SetSelect function

Hi,
I would need to delay (i.e for 10 seconds ) the triggering of the function below :

 
<script>
$(document).ready(function(){
    SSI_SetSelect('Intro_2', true);
})
</script> 
 

The behavior I would need to achieve  is as following  : the Intro question (radio checked, require response) is displayed with no preselected value , and if no answer is checked within 10 seconds, the question would be auto-selected with value 2. 


thank you !