Several R&D projects have been carried out in various regions, using different approaches, to disseminate these practices to producers. Despite their effectiveness, their long-term adoption remains very limited. This reflects the need to better integrate the producers concerned in the planning and choices of agroecological practices to be introduced into existing agricultural systems, through tools that bring together all the actors concerned in relation to a common objective. It is in this context that the hypothesis of this thesis is put forward, namely that the integration of role-playing games in these processes will allow creating an exchange environment for stakeholders, for example, in relation to the sustainability and valorisation of existing natural resources (soil and water) and its impact on the profitability of production.

In this perspective and within the framework of the PACTE programme " PROGRAMME FOR ADAPTATION TO CLIMATE CHANGE IN RURAL AREAS IN TUNISIA ", agroecology field schools have been implemented since 2020 in central Tunisia. The aim of these schools is to integrate producers' knowledge and scientific disciplines for the dissemination of agroecological practices.

The main objective of the thesis is to co-design a methodological approach to support agroecological transitions in central Tunisia, by integrating all the actors involved in this process. To this end, the thesis work is organised into four main stages:

• monitoring and evaluation of the agroecological field schools approach,
• resizing the approach according to the limits identified during the monitoring and evaluation,
• co-designing with local producers a role-playing game on transitions to agroecological practices,
• and final evaluation of the impact of the role-playing game on collective decision-making processes, capacity building of producers and changes in the posture of the actors involved in agroecological transitions.  

Key Words: agroecology, participatory approach, role-playing game, Tunisia

© Photo, R. Jaouadi: workshop with stakeholders, March 2022

© Photo, R. Jaouadi: planning workshop, September 2022

© Photo, R. Jaouadi: planning model co-built with producers, September 2022