what

• any usual behaviour that we observe the more likely we are to see it as normal
• any unusual behaviour, trait or characteristic is seen as abnormal
• statistical infrequency- any unusual behaviour that is not normal for society
• any behaviour that is found in very few people is regarded as abnormal. for this reason, the explanation is known as 'statistical infrequency'
• the average IQ is set at 100.
• in a normal distribution, most people have a score in the range from 85% and 115%
• only 2% of people have a score below 70%. these individuals are abnormal and are likely to receive a diagnosis of a psychological disorder such as intellectual disability disorder