On the other hand, 'Effect' is mainly used as a noun, signifying the result or outcome of a cause. For example, "The effect of the new policy was noticeable."
In psychological terms, 'affect' refers to an observable expression of emotion. It's important to distinguish this from its general usage.
Less commonly, 'effect' can be used as a verb meaning to bring something about, as in "to effect change."
Understanding their use in sentences can clear confusion. "The new law affected the economy." vs "The new law had a significant effect on the economy."
Remember, "Affect is an Action" and "Effect is an End-result" to keep them straight.
In certain contexts, these words can take on different meanings, adding to the confusion. For instance, 'affect' as a noun in psychology, or 'effect' as a verb.
Understanding their etymology helps. Both words have Latin roots; 'affect' comes from 'afficere' (to do something to), and 'effect' from 'effectus' (an accomplishment).
Be wary of common errors, like using 'effect' when 'affect' is appropriate, and vice versa.
When in doubt, replace 'affect/effect' with synonyms (influence/result) to see which fits better.