1.1.3 - Comment on whether CAPD meets scientific criteria for validity

Question 1

What are the definition concerns with CAPD?

Answer 1

• it’s not in the DSM-5
• It’s behaviourally defined
• there is much overlap

Question 2

What are the problems with the psychometric properties of CAPD’s tests?

Answer 2

They are not symptom based, but based on the results of auditory tests

The tests involve the use of language, so it is difficult to rule out possibility of poor performance due to language disorder

11 different subtypes of CAPD are not easy to distinguish, and it’s unclear how they are correlated

Question 3

What are the distinctiveness problems with CAPD?

Answer 3

WE don’t know if it is distinct from speech, language or literacy disorders

There are overlaps with language disorders, as the tests are language based

They lack external discriminant validity (i.e. - they can’t be differentiated from other disorders)

Question 4

Describe the empirical research for CAPD

Answer 4

There is none! No evidence to support reliability or construct validity

Question 5

What are the four areas of problems with the validity of CAPD

Answer 5

Definitional concerns
Psychometric properties of tests
Distinctness
Lack of empirical research