NEW: J.Greene interviewed on the award-winning podcast @Ologies with @alieward. In this "Trolleyology" episode, Josh discusses moral dilemmas, effective charitable giving (@GiveMultiplier), building bridges across political divides, and more. 🎧 Listen: pod.link/1278815517/episode/…

9/12 Exp 4 shows that real-time cooperative interaction is key. A solo quiz with the same content doesn’t work. (Though @jgvoelkel and @RobbWiller and the Strengthening Democracy Challenge team had more success with our 1-player quiz than we did.)

8/12 We see moderately durable effects on certain democracy-related attitudes, some related to #intellectualhumility.

7/12 Tango works without political content, but we see bigger and more durable effects with the political content in. A critical factor, we find, is mutual respect.

4/12 We show that Tango is *fun*. Across four experiments played in pairs, the median enjoyment ratings are a perfect 100/100 or 10/10, with rave reviews from both Republicans and Democrats:

2/12 In Exp 2, participants divide $100 between a random Republican and Democrat. After playing Tango once for less than an hour, those with outparty partners divided $ more equally 4 months later. We see 1-month effects on outparty warmth in Exp 2 and 4-month effects in Exp 3.

🧵1/12 New GreeneLab paper in Nature Human Behaviour—after 5+ years! Our cooperative quiz game, Tango (letstango.org), defuses political animosity and improves democracy-related attitudes. Some key effects last 4 months doi.org/10.1038/s41562-025-0…

Then donors use this nifty slider to allocate their donation between their personal favorite charity and their selected super-effective charity. The more you allocate to the super-effective charity, the higher the matching rate for *both* charities. (13/20)

Bundle donors feel they’ve supported a personally meaningful cause, almost as if they’d given it all to their favorite charity, but with the added satisfaction of boosting their impact. And bundle donors seem highly warm AND highly competent. (8/20)

Later experiments showed that favorite+effective donation bundles are distinctively appealing because they provide two kinds of satisfaction, allowing people to give “from the heart” but also “with the head” (7/N)