C5 - Definitions of abnormality - Statistical infrequency

Question 1

Statistical infrequency

Answer 1

• Number of times it is observed
• Any usual behaviour is normal
• Any different behaviour is abnormal

Question 2

IQ & intellectual disability disorder

Answer 2

• Average IQ is 100
• 2% have IQ below 70
• Those 2% are abnormal & are diagnosed with IDD

Question 3

Evaluations of statistical infrequency (SL)

Answer 3

S - Real-world application
L - Unusual characteristics can also be positive

Question 4

S - Real-world application

Answer 4

• Useful in diagnosis (e.g. bottom 2% have IDD)
• Helps to assess range of conditions (e.g. BDI assesses depression, 5% score 30+)
• SI useful in diagnostic & assessment processes

Question 5

L - Unusual characteristics can also be positive

Answer 5

• If few display characteristic, behaviour is SI but doesn’t mean we call them abnormal
• IQ above 130 as unusual as below 70, but not regarded as undesirable
• Althought SI can define abnormality, it can’t be sole basis