Reliability Flashcards
What are the 2 ways of testing reliability?
Test- retest
Inter-observer reliability
Explain test- retest
Test given to same PPTS- correlate results
Must leave time between
= significant if results are positive as they are reliable
Improves content analysis
Used in studies not observations
What is inter- observer reliability?
Multiple observers record data x results are correlated
Done independently
Reliable if +0.08
Explain the ways of improving reliability in Questionnaires
Test retest
If scores low, rewrite Qus
Replace closed Qus
Explain the ways of improving reliability in Interviews
Structured, standardised procedures
Same interviews each time
(Won’t ask leading qus etc)
Explain the ways of improving reliability in experiments
Standardised procedures
= integral in comparing PPT performance
Explain the ways of improving the reliability of observations
Operationalise categories
(Clear, not overlapping)
Observer should bevrrained in behavioral categories
What is reliability
Consistency
Same procedures/ results
= consistent results each time used
2 types:
Internal
external
What is internal reliability
PPTS given same EXACT procedures
- then have similar scores
Designed for replication=
Standardised
What Is external reliability
The extent
Test measures are consistent over time
E.g. similar scores a week apart
What is the difference between reliability and validity?
Something may be consistent (reliable), but not accurate (valid)
E.g.a fake ID
may be consistently used
But isn’t accurately you
