Reliability And Validity

Question 1

What’s reliability

Answer 1

Consistency

Question 2

How do we assess reliability

Answer 2

Test re-test
Inter-observer reliability

Question 3

How do we use test re-test

Answer 3

This invloves administrating the same test or questionnaire back to the same people, on different occasions. However the time between the tests cant be too long because the particpants might change, but can be too soon because the might show order effects

Question 4

How do we use inter-observer reliability

Answer 4

Someone’s observation of interpretation of events may differ widely in comparison to someone else.
So they suggested that observations could be competed in teams of 2 but inter-rather reliability should be established. Observers can watch the same events and individually record their data and then correlate their data to see if its similar

Question 5

What is internal validity

Answer 5

This is when we end up measuring something that we don’t claim to be measuring

Question 6

What factors decrease internal validity

Answer 6

Ev’s and cv’s
Demand characteristics
Investigator effects
Social desirability bias

Question 7

Whats external validity

Answer 7

When outside factors impact the study

Question 8

What might affect the external validity

Answer 8

Population validity
Ecological validity
Mundane realism
Temporal validity