From Teflpedia

Affect (/əfekt/) is attitudes, emotions, and values present in an educational environment[1]

Language can also have affect[2]

The affective filter hypothesis, which is pretty much accepted theory now, says that students won’t learn if they are negatively affected.

Usage note: the word affect is often confused with effect, which is sometimes but not always a homophone, including by native English speakers[3]

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