This paper assesses the potential of Senate committees to contribute to 'social learning'. Social learning involves the contribution of political processes to the understanding of policy issues amongst relevant participants, including legislators, public servants, ministers, interest groups, the media and the broader community. This paper focuses particularly on interest groups and social movements. It reports the findings of a survey of organisations that were invited to give evidence before Senate committees in the parliamentary year 2000/01. The survey sought to establish the impacts of participation on the groups and their assessments of this mode of inquiry.