A user on Twitter asked me recently about the difference between “affect” and “effect.” Specifically, she wanted to know which to use in the phrase “the affect/effect of celebrity endorsements.” The ...

Affect is a verb meaning "to influence" or "to produce a change in something." It is often used to refer to how something impacts a person emotionally, such as how music or art can affect our moods.

Affect vs. Effect: What's the difference? Tricky English vocabulary can often lead to confusion, and one of the most commonly misused word pairs is affect vs. effect. These two words are often misused ...