Prebunking for your personal life

The science page · last updated July 25, 2026 · written to be quoted, citations at the bottom, caveats included on purpose

The short version

For a decade, psychologists have tested a defense against manipulation called inoculation, or "prebunking": expose someone to a weakened dose of a manipulation technique — in a game, with consent, before it matters — and they get measurably better at recognizing the real thing. Governments funded it to protect the public from foreign disinformation. Psy-Opt-In applies the same mechanism to the manipulation people actually face daily: guilt trips, scam calls, love-bombing, pressure closes.

The evidence that the mechanism works

Bad News (University of Cambridge / DROG) put players in the role of a disinformation creator for 15 minutes. Across a study of about 15,000 participants, playing reduced the perceived reliability of manipulative content — for some techniques by around 24% — and the free browser game has been played by over a million people in 20+ languages.
Harmony Square, the political sequel, was built with funding from the U.S. State Department's Global Engagement Center and DHS/CISA. Inoculating civilians against manipulation was, quite literally, U.S. defense policy.
Google Jigsaw ran 90-second prebunking videos as ads in Central Europe: 38 million views, with surveyed viewers measurably better at picking out manipulation techniques afterward.
The mechanism underneath is the persuasion knowledge effect, one of the most replicated findings in consumer psychology: a tactic you can name while it's happening loses most of its force.

The caveats, because a page like this should have them

Inoculation effects are real but modest, and they decay without practice. At least one replication (with Indian participants, different media environment) found no improvement, and the Jigsaw videos that worked in Poland did little in Slovakia when they weren't localized. Read honestly, the literature says three things: the effect exists, it is not magic, and it needs reps and specificity — generic one-shot lessons fade. We built the product around exactly those three findings, and we'd rather you know the effect sizes than oversell them.

The gap Psy-Opt-In was built for

Nearly all of that research and funding aimed at state-level disinformation — election lies, foreign propaganda. But the manipulation with your name on it doesn't usually come from a foreign government. It comes from a scam caller with a script, a salesman with a quota, a partner who weaponizes guilt, a group chat full of manufactured winners. Same tactics, smaller radius, higher hit rate.

Psy-Opt-In is that same inoculation model, aimed at the interpersonal version, with the fixes the literature asks for:

Weakened dose, with consent: story simulations and live AI characters run real tactics on you after you opt in — that's the name.
Naming, mid-move: every tactic is named and decoded right after it runs, training the persuasion-knowledge reflex, not trivia recall.
Reps, not lectures: daily cases, sparring, and a 30-day path, because one-shot inoculation fades and practiced inoculation doesn't.
Your scenarios, not generic ones: the boss, the mother, the dealership, the dating app — the Slovakia lesson is that specificity is the difference between working and not.

Try the mechanism on yourself

The fastest way to evaluate any of this is the 3-minute spotting test — twelve messages, ten tactics, two clean. If naming the strings turns out to be harder than you expected, that's the gap the training closes.

Take the 3-minute test Start the 30-Day Path

What this page is not

Psy-Opt-In is not affiliated with the University of Cambridge, DROG, Google Jigsaw, or any government program mentioned here. We cite their published work; they haven't endorsed ours.
This is skills training, not therapy — grounded in documented behavioral research, but not diagnosis or treatment.
Defense only. The product refuses to teach you to manipulate anyone — the offensive versions of these curricula already have enough vendors.

Sources

Roozenbeek, J. & van der Linden, S. (2019). "Fake news game confers psychological resistance against online misinformation." Palgrave Communications. nature.com
Roozenbeek, J. & van der Linden, S. — Bad News results overview, University of Cambridge: "Fake news 'vaccine' works"
University of Cambridge (2020). Harmony Square announcement (notes Global Engagement Center + CISA support)
Basol, Roozenbeek et al. (2021). Cross-cultural inoculation results, HKS Misinformation Review
Null replication with Indian samples: "Re-examining the Bad News game"
Google Jigsaw prebunking campaign, Central & Eastern Europe: Google Safety Center case study
Friestad, M. & Wright, P. (1994). "The Persuasion Knowledge Model." Journal of Consumer Research — the naming effect this whole field stands on.

Contact

Corrections to this page are welcome and get made: line@psyoptin.com — a person reads it. Machine-readable site guide: /llms.txt.