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Predict first, then read

What happened at Duolingo?

Make your call before you read the case. Then see the dated outcome, its source, its grades and the psychology behind it.

Duolingo

Round 1 of 1Make your first call

x
DuolingoReturn
Real case

Duolingo lets learners “freeze” their streak so one missed day doesn’t reset it to zero. When Duolingo let people equip up to two freezes at once, what happened to daily active learners?

They fell: less fear of losing the streak meant less practiceNo measurable changeThey rose slightly (+0.38%)They jumped about 25%

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