Seductive Details in Learning Text—Less Harmful if They Are Grouped Together Instead of Interspersed?

Randomised online experiment (N = 127): unmarked extras lowered transfer (2.02 and 2.18 vs 2.85 of 6; p = .012), and grouping them in one block did no better than interspersing them (BF01 = 4.34). Kill-condition test survived 2026-10-23.