Lesson 3: Statistical Infrequency- Definition of Abnormality

Question 1

Statistical in frequency definition

Answer 1

Statistical infrequency occurs when an individual possesses a less common characteristic than most of the population. The behaviours displayed are statistically rare, for example being extremely intelligent with an IQ score over 130.

Question 2

IQ stats statistical infrequency

Answer 2

• 2.5% below 70 and above 130
• 95% in between

Question 3

Advantages of statistical infrequency

Answer 3

It is just as unusual to be below average than it is to be above average
- however being above 130 is not a negative behaviour, but actually desirable

Judgements are based on objective, scientific and unbiased data that can help indicate abnormality and normality
- can indicate whether someone needs psychological help e.g. IQ below 70 can indicate mental disability

Question 4

Disadvantages of statistical infrequency

Answer 4

It involves labelling people as abnormal
- a person with an IQ below 70 might be labelled in a negative manner by other members of society and could lower their self esteem

Subjective cut off point
- e.g. 70 is abnormal but 71 is normal? Cut off point can be questioned