Social Norm defintion of Abonormality
When behaviour deviates from the social norm and is seen by the majority of society as Abnormal.
However this defintion does depned on several factors including:
Culture : Behaviour that is accepted in some cultures as acceptable could be seen as abnormal in other cultures
Context: The context of the behaviour is very important, abnormal behaviour can in certain situations be seen as normal e.g. A grown man wearing fancy dress to a fancy dress party would be accepted but in everyday life would be seen as abnormal.
Age: Also important, abonormal behaviour can be accepted due to a persons age. E.g a young child wearing fancy dress everyday would be accpted but for a 30 year old man this would be abnormal
Statistical Defintion of Abnormality
When behaviour is statiscally rare then it is seen as abnormal, when behaviour is seen as statistically common then it is considered to be normal.
A common example used is IQ tests if data is above or below what is normal then this is abnormal
The defintion uses quantative data so a normal disturbution curve is drawn up to compare results.
Standard deviation can be used to see if data falls above or below what is normal and is therefore abnormal.