control group
B1CEFR level
30/100Rarity: fairly common
TechnicalRegister
The set of users who receive the existing experience and serve as a baseline against which a change is compared.
The control group kept the old onboarding while the treatment saw the redesigned flow.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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