Problem with Emailing Quiz Taker Code

The Quiz module is set to email the results to the taker upon scoring a quiz. However, it is sending the email to the currently logged in user rather than the person who took the quiz. The currently logged in user is always the individual scoring the quiz and not the taker. The problem is in this function:

function quiz_quiz_scored($quiz, $score, $rid) {
  global $user;
  
  if (variable_get('quiz_email_results', 0) && $user->uid != 0 && $score['is_evaluated']) {
    drupal_mail('quiz', 'notice', $user->mail, NULL, array($quiz, $score, $rid, 'taker'));
      if ($user->uid && quiz_is_passed($user->uid, $quiz->nid, $quiz->vid)) {
        drupal_mail('certificate', 'notice', $user->mail, NULL, array($quiz, $score, $rid, 'taker'));
      }
    drupal_set_message(t('The results has been sent to the users e-mail address.'));
  }

  // Calls userpoints functions to credit user point based on number of correct
  // answers.
  if ($quiz->has_userpoints && $user->uid != 0 && $score['is_evaluated']) {
    
    //Looking up the tid of the selected Userpoint vocabulary
    $selected_tid = db_result(
      db_query("SELECT tid FROM {term_node}
                WHERE nid = %d AND vid = %d AND tid IN (
                  SELECT tid
                  FROM {term_data}
                  WHERE vid = %d
                )", $quiz->nid, $quiz->vid, userpoints_get_vid()));
    $variables = array(
      '@title' => $quiz->title,
      '@quiz' => variable_get('quiz_name', QUIZ_NAME),
      '@time' => date('l jS \of F Y h:i:s A'),
    );
    $params = array(
      'points' => $score['numeric_score'],
      'description' => t('Attened @title @quiz on @time', $variables),
      'tid' => $selected_tid,
    );
    userpoints_userpointsapi($params);
  }
}