<P> In psychology, a mood is an emotional state . In contrast to emotions, feelings, or affects, moods are less specific, less intense and less likely to be provoked or instantiated by a particular stimulus or event . Moods are typically described as having either a positive or negative valence . In other words, people usually talk about being in a good mood or a bad mood . </P> <P> Mood also differs from temperament or personality traits which are even longer - lasting . Nevertheless, personality traits such as optimism and neuroticism predispose certain types of moods . Long term disturbances of mood such as clinical depression and bipolar disorder are considered mood disorders . Mood is an internal, subjective state but it often can be inferred from posture and other behaviors . "We can be sent into a mood by an unexpected event, from the happiness of seeing an old friend to the anger of discovering betrayal by a partner . We may also just fall into a mood ." </P>

What is the meaning of mood and emotion
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