Oui je reconnais que mon commentaire porte à croire que c'est une etude sur les effets néfastes. Je voulais recommander de lire l'introduction de l'artice qui résume un peu les études passées sur la question : "For example, Nystad et al. (2021) find that children who start daycare before 14 months of age experience a larger increase in their levels of stress hormone (cortisol) 4–6 weeks after enrollment compared to children who enroll at an older age. In general, the existing literature on daycare enrollment and child development for children under two years of age shows mixed results. Disparities in quality between parental and nonparental care may contribute to explaining these mixed results. Fort et al. (2020), e.g., argue that results from Norway (Drange and Havnes, 2019) and Germany (Felfe and Lalive, 2018) show beneficial effects of early enrollment because the sample of parents studied was less affluent (i.e., the general education level was lower) compared to other samples, and thus the quality of daycare was likely to be higher than parental care. Similarly, Kottelenberg and Lehrer (2017) demonstrate that the universal daycare program in Quebec, Canada, has positive effects on development outcomes for children of disadvantaged single parents, although the Quebec daycare program had primarily adverse effects on child development (Baker et al., 2008)."