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A boy is highly confident one day and the next day scared, timid and shy.

A girl is emotional one day and emotionless the next.

Is there a term for a drastic switching of emotions? A term for the switching to practically opposite emotions?

EDIT: Just to clarify the emotional changes are not rapid, and are permanent. This rules out bi-polar, because bi-polar involves multiple periods of change.

EDIT2: I'm looking for a work to demonstrate the steepness or contrasts of change, but having no relationship to the speed of change.

Example:

Over a course of 3 years a once quiet boy become the spokesmen of the school.

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Mercurial, Robb's answer, perfectly suits your needs. –  Uticensis Apr 15 '11 at 2:23
    
Considering that changes are permanent I thought it also kinda rules out fickle or erratic. It appears mercurial has to do with constantly changing. sentence.yourdictionary.com/mercurial –  Liam William Apr 15 '11 at 2:30
    
I misread your text; I thought you said "are rapid, and not permanent." Sorry. –  Uticensis Apr 15 '11 at 2:31
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7 Answers

up vote 2 down vote accepted

There are some good answers already, but to pitch in.

Cyclothymia could also be considered.

BUT! It might be more appropriate for:

  • Mood swings (rather that emotion swings)
  • A more severe/serious condition.

But it does fit to:

drastic switching of emotions

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There other answers were great, but I ended up using yours because it best fit my unique situation. Thanks. –  Liam William May 6 '11 at 2:49
    
@Lime: Oh I did not expect that, glad it helped! –  Trufa May 6 '11 at 3:10
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Is there a term for a drastic switching of emotions? Yes, indeed. Mood swing is one such term:

mood swing
an abrupt and apparently unaccountable change of mood. NOAD

Another term you may find useful is one I heard from a friend and have since included in my dictionary—emotional roller coaster:

roller coaster
(figurative) a thing that contains or goes through wild and unpredictable changes. NOAD

Quick colloquial example: Man, I'm going through an emotional roller coaster right now. Too many girls in the picture! Aaarggh!!!

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Members of my crowd would say, "I'm going through a rough time right now. I feel like I'm _on_(or have been on) an emotional roller coaster." –  sarah Jan 5 '12 at 6:37
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mercurial

[mer-kyoor-ee-uhl]

–adjective

changeable; volatile; fickle; flighty; erratic: a mercurial nature.

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One might say temperamental when a person's mood is volatile. This means that they could be fine one moment but are very easily triggered to be angry or upset. Also, emotionally unstable.

Unpredictable might be fitting for someone whose mood can be very different at different times and who reacts unexpectedly to things.

Of course, if someone is displaying very drastic changes in mood, attitude and personality on different days, then it is possible that they are bi-polar or manic depressive, both of which are medical terms referring to different types of personality disorder.

Hope that helps.

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Emotional Lability or Labile is a psychiatric term used to refer to emotions that are extreme, exaggerated, and incongruent with immediate circumstances.

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Bi-polar is close to what you mean, but it sounds like what you want is a verb.

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Ambivalent technically means having two contradictory emotions at the same time, which is related but not quite the same. However, the term has come to be used for people who are indifferent to the topic.

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