(4) RELIABILITY AND VALIDITY

Question 1

Define internal and external reliability and explain how to assess both

Answer 1

Internal - the extent to which a test/procedure is consistent within itself
Assessed by: Split-Half method - results from two halves of test are compared. A close correlation = an
Internally reliable test
Inter-rate reliability - consistency between diff researchers observing the same study should be
High
External - the consistency from one occasion to another
Assessed by: Test-retest - participants take the same test on different occasion

Question 2

What is internal and external validity and how can it be assessed

Answer 2

Question 3

How to improve validity

Answer 3