The rule. Put deliberate friction at the moment a person accepts AI output, and keep the moment they request it effortless.
Why. In a controlled study of AI-assisted decision-making (N=199), cognitive forcing functions at the decision point significantly reduced overreliance on incorrect AI suggestions while simple explainable AI treatments did not, and participants gave their least favorable ratings to the designs that reduced overreliance the most (Buçinca et al., 2021). A follow-up across two experiments (264 and 210 participants) found that partial explanations, which withhold part of the reasoning so the user has to complete it, also reduced overreliance on incorrect suggestions compared to no explanation at all (de Jong et al., 2025). Both papers report the benefit concentrating in people with a higher need for cognition, so the checkpoint helps most the users already willing to think.
Seen in the wild. GitHub keeps Actions workflows on Copilot-created pull requests paused until a person approves them, and the requester's own approval does not count toward required reviews (GitHub, n.d.).