public function on_generate_response_processing()
{
$qresprocessing = new cc_assesment_resprocessingtype();
$this->qitem->add_resprocessing($qresprocessing);
$qdecvar = new cc_assesment_decvartype();
$qresprocessing->set_decvar($qdecvar);
//according to the Common Cartridge 1.1 Profile: Implementation document
//this should always be set to 0, 100 in case of question type that is not essay
$qdecvar->set_limits(0, 100);
$qdecvar->set_vartype(cc_qti_values::Decimal);
$this->qresprocessing = $qresprocessing;
}