Pervasive negative effects of rewards on intrinsic motivation: The myth continues

Counter-meta arguing pervasive harm is a myth; free-choice still negative for expected tangible / doing (d1 = −0.18 / −0.35) — C22 kill-test survived 2026-10-27 extra12. Performance-criterion carve-out in Bounds.

Durability: of seven experiments with rewards for doing the task that measured free choice again a few weeks later, only two still showed a significant drop (pp. 23–24); the homogeneous estimate for rewards for doing the task is d+ = −0.30 (K = 50, Figure 1). C22 gives no time bound.