multivariate test
B2CEFR level
65/100Rarity: rare
TechnicalRegister
An experiment that varies several elements at once to measure both their individual and combined effects.
The multivariate test crossed three headlines with two images to find the best pairing.
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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