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In psychology , affect is used to describe mood, especially a change in mood. However, while affect may describe mood, the two are completely different in meaning. Mood is a state of feeling (emotional), usually temporary, resulting from a specific stimulus. The word is derived from an ancient English word âmodâ which meant courage especially during war times.
The basic difference (most of the time) between AFFECT and EFFECT is that AFFECT is a verb, and EFFECT is a noun. About 90 percent of the time, that definition will serve you well. Here are some example sentences: My uncle's stroke affected his ability to speak clearly.