The misuse of affect and effect is very common. Here is a brief explanation of how to use these words correctly.
Affect is a verb meaning to change or influence.
For Example: Jan’s touching speech affected everyone in the room.
For Example: Zoe does not want to affect anyone’s opinions regarding the proposed membership changes.
Effect is a noun meaning a cause or result.
For Example: Hiring an editor will have a positive effect on your writing career.
For Example: I couldn’t believe the effect her behavior had on her sister.
Grammar girl has a great trick for remembering the difference between the two. She calls it the RAVEN trick. This is how she explains it: “Because raven has the letters A-V-E-N in it, and those also stand for Affect: Verb Effect: Noun (You can read the whole trick here.)
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