Have parenting programs for disruptive child behavior become less effective? - Leijten, Patty; Melendez‐Torres, G.J.; Backhaus, Sophia; Gardner, Frances; Groenman, Annabeth P.; Dekkers, Tycho J.; van den Hoofdakker, Barbara J.; Laas Sigurðardóttir, Liina Björg; Liu, Danni; Luman, Marjolein; Mansur, Lara; Nieterau, Merlin; et al. (Journal of Child Psychology & Psychiatry, 2026)