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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.
1 Affect is usually used as a verb. It is an action word that means to produce a change in or influence something.  Effect is usually used as a noun. It is a an event that means a change that occurred. When an s is added, effects means personal belongings.