def export_survey_participant_list(self, instrument, event=None, format='json'):
        """
        Export the Survey Participant List

        Notes
        -----
        The passed instrument must be set up as a survey instrument.

        Parameters
        ----------
        instrument: str
            Name of instrument as seen in second column of Data Dictionary.
        event: str
            Unique event name, only used in longitudinal projects
        format: (json, xml, csv), json by default
            Format of returned data
        """
        pl = self.__basepl(content='participantList', format=format)
        pl['instrument'] = instrument
        if event:
            pl['event'] = event
        return self._call_api(pl, 'exp_survey_participant_list')