Reliability

Question 1

Reliability

Answer 1

a measure of how consistent the findings from an investigation are

Question 2

Interval validity and assessment

Answer 2

internal validity - how consistent something is within itself

split half method - randomly select half questions and put them in one form and then do the same for others
-these two forms of the same test are done separately and should yield the same score
0.80

Question 3

External validity

Answer 3

external validity - when consistent results are produced regardless of when the investigation is used

Test retest method
Administer the same test of the same person on a different occasion - should yield a correlation of 0.80

Inter observer reliability
Agreement between two or more observers when observing behaviour
eliminates subjectivity bias

Question 4

improving reliability

Answer 4

1. Observations - operationalised behavioural categories
2. questionnaires -
   test retest method
   using closed fixed questions
3. experiments -
   lab experiments - high level of controls
   standardised procedures
4. interviews -
   using the sae interviewer structured interviews , avoiding leading questions