Varia Vol. 83, 2020/1 - pagesPages 1 to 32“Dialogued gesture” and musculoskeletal disorders preventionBy Pascal Simonet, Sandrine CarolyPages 33 to 59Supporting the design activity of farmers in transition to agroecology: Towards an understandingBy Marie Chizallet, Lorène Prost, Flore BarcelliniPages 61 to 89Mental Representation Impact Analysis (MERIA), a method for analyzing mental representations for the design of HMI. A case study in aeronauticsBy Théodore Letouzé, Lisa Créno, Jaime Diaz-Pineda, Charles-Alban Dormoy, Sylvain Hourlier, Jean-Marc André