confounder
C1CEFR level
65/100Rarity: rare
TechnicalRegister
A hidden variable that influences both the supposed cause and the effect, biasing the apparent relationship.
Ad spend correlates with sales, but seasonality is a confounder driving both.
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.
Get words like confounder on your lock screen, a few a day, with review that makes them stick.
Download on the App Store Lexfall puts a new word on your home and lock screen through widgets, so you learn without opening an app. Free to download. After a free trial, a subscription unlocks every field. Built for iPhone, iOS 15.1 or later.
On a computer?Scan with your iPhone camera.