This bookdown contains the scripts of instructional videos created in the context of the ExELang Project ( It is available from DOI.

Alejandrina Cristia is grateful for the funding and institutional support from Agence Nationale de la Recherche (ANR-17-CE28-0007 LangAge, ANR-16-DATA-0004 ACLEW, ANR-14-CE30-0003 MechELex, ANR-17-EURE-0017); a J. S. McDonnell Foundation Understanding Human Cognition Scholar Award; and an ERC Consolidator grant (ExELang, 2021-2026). The funders had no role in the production of this bookdown or the associated videos.

Alejandrina Cristia and Sara Pisani co-wrote the scripts, with input from Lucas Gautheron; Sara Pisani prepared the visual contents. Alejandrina Cristia assumes full responsibility for the contents. We are grateful to people who contributed to the contents more or less directly:

  • Nicolas Gérard, for video editing and graphics in chapters 2, 3, 5,19
  • Philippe Dauli, creation of the other videos
  • Camila Scaff, on whose EMLAR class some of the visuals and content organization are based
  • Emmanuel Dupoux, Xuan Nga Cao, and Manel Khentout for their expertise on the babyloggers
  • Marvin Lavechin, for contributions on the explanation of the automated analysis software
  • Lucas Gautheron, on the ChildProject tutorial sections
  • Clementine Fourrier, for contacts with the ENS Audiovisual department
  • Catherine Urban, for administrative support
  • and particularly, to our collaborators in related projects, from whom we have learned tremendously:
    • Elika Bergelson and Marisa Casillas, for frequent discussions ranging from data collection to analyses and beyond
    • Marisa Casillas, Jonathan Stieglitz, Gandhi Yetish, and Camila Scaff, for insights regarding the use of long-form recordings in field conditions, and mentoring before, during, and after fieldwork
    • Florencia Lopez Boo and Maria de la Paz Ferro, for irreplaceable discussions about the use of long-form recordings in the context of large randomized control trials evaluating at scale social programs
    • Fiona Burns, Pauline Grosjean, and Sarah Walker, for invaluable conversations about application to large randomized control trials in field conditions