public function find_previous_surveys($scope, $survey_type)
 {
     include "../include/dbconnopen.php";
     // Ensure parameters are safe to be in a query (although they should be)
     $scope_sqlsafe = mysqli_real_escape_string($cnnEnlace, $scope);
     $survey_type_sqlsafe = mysqli_real_escape_string($cnnEnlace, $survey_type);
     $impact_assessment_search = "SELECT * FROM Assessments WHERE Date_Logged >= DATE_SUB(now(), INTERVAL " . $scope_sqlsafe . " MONTH) AND Participant_ID='" . $this->participant_id . "' ORDER BY Date_Logged DESC";
     $impact_assessments = mysqli_query($cnnEnlace, $impact_assessment_search);
     if (!$impact_assessments) {
         return array();
         // Bail out, we've not found any
     }
     // Build an array of all the results
     $assessments = array();
     while ($assessment = mysqli_fetch_array($impact_assessments)) {
         $assessments[] = Assessment::createFromDatabase($assessment);
     }
     return $assessments;
 }