Instability
When some thing changes again and again within a small period of time, and is not able to be consistent over a period of time, we call it to be unstable that is where stability is not present. Instability in behavior as exhibited by people can be because of a variety of reasons. Firstly, instability might temporarily occur as a result of different environmental situation, it can also occur due to underlying disorder. Mood instability or mood swing is commonly seen in most people in some or the other time. Instability resulting from the immediate environmental condition might go away as soon as the person is brought out the environment that causes instability, however, when it occurs as a behavioural manifestation of an underlying disorder, it should be given proper clinical intervention. For example, When a person suffers from conditions bipolar mood disorder, or cyclotymia they might experience instability in their moods and manifest it in their behaviour, which requires clinical attention.