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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.
Affect versus effect. Every month, affect is one of the most searched-for words in Oxford Dictionaries Online. Its high ranking in our search logs is probably because a lot of people are confused about the difference between affect and effect, two words which have almost the same spelling, but very different meanings.