Study day : Correct or not correct the measurement effects? November 24, 2025

On Monday 24 November, ahead of INSEE's Statistical Methodology Days, LifeObs organised an afternoon event on the subject of measurement effects. The event was a success, with nearly 70 people attending. The presentations and discussions helped to define what measurement effects are and to share best practices on how to avoid them. Then, as the highlight of the day, several examples of initial work carried out to correct these effects were shared in order to demonstrate the methods used and discuss the results obtained. Correcting a measurement effect requires answering several questions: what is the ‘true’ measurement? What really needs to be corrected? The day therefore ended with a discussion on the relevance of such corrections: how far should we go? What can be managed upstream, through tests or adjustments to the questionnaire? The questions remain open. 

Moderated by Laurent Toulemon (INED) and Thomas Deroyon (SSMSI), the two sessions featured presentations by representatives of key players in the field of surveys, such as INED (Albane Gourdol, Guillaume Carette, Linh Nguyen), INSEE (Thomas Merly-Alpa, Christine Fluxa), Santé publique France (Noémie Soullier) and ENSAI (Stéphane Legleye).

Want to learn more? Find all the presentation materials in the download box on the right. Do you have any ideas on this topic? A working group will soon be set up following this event to explore this topic in greater depth in 2026, as it has become key with the development of multimodal surveys. Contact Guillaume Carette (guillaume.carette@ined.fr) to join the working group or if you have any other questions on this subject