Reliability and validity and classifications

Question 1

What are the three ways in which the reliability of a diagnosis can be undermined?

Answer 1

Difference in procedure, difference in clinicians, difference in patients.

Question 2

What are the three types of validity in regards to validity of classification?

Answer 2

Aetiological, predictive and descriptive.

Question 3

What is aetiological validity?

Answer 3

Being able to identify the causes of a symptom.

Question 4

What is descriptive validity?

Answer 4

Are the symptoms right?

Question 5

What is predictive validity?

Answer 5

Knowing how the patient will react to the medication.

Question 6

What are the problems of a type 1 error?

Answer 6

If an individual is given medication when they do not need it, they will experience adverse side-effects when it is not necessary.
They may also be stigmatised.
This could be a self-fulfilling prophecy.

Question 7

What are the problems of a type 2 error?

Answer 7

If an individual isn’t given necessary medication they may be blamed for their poor functioning as well as being unable to improve.