Validity and Reliability Flashcards
1
Q
external validity
A
extent to which results of a study can be generalised and applied to real life settings
2
Q
internal validity
A
measuring the right thing
3
Q
types of validity
A
temporal, ecological, population
4
Q
factors affecting internal validity
A
- demand characteristics
- confounding variables e.g. extraneous
- social desirability bias
- investigator effects
- poorly operationalised variables/behavioural categories
5
Q
dealing with validity issues
A
- experimental realism - ppts forget it’s an experiment if it’s realistic and engaging
- pilot study - test study with a small group of ppts
- single blind study- prevents DC
- double blind study - prevents DC and researcher bias
6
Q
Face validity
A
- extent to which a measure looks like it’s measuring the right thing
- improved by changing/rewording questions
7
Q
how is face validity assessed?
A
- researcher checks their tools are measuring the right thing
- also ask a peer to check for us
- doesn’t require expert knowledge of the topic
8
Q
concurrent validity
A
- extent to which your measure is similar to another measure of the same thing
- improved by amending tasks/questions and checking concurrent validity again
9
Q
how is concurrent validity assessed?
A
- compare yours to another previously validated measure on the same topic
- ppts given both method to complete and results are compared
- if similar then you have concurrent validity
10
Q
reliablity
A
- extent to which research is consistent
- need to show an understanding of how you might test this and improve it
11
Q
ways of assessing reliability
A
- test-retest at spaced intervals
- inter-rater reliability
- experiment: check how dv is measured
- observations: use operationalised behavioural categories
- self-reports: test-retest for questionnaires, inter-rater for interviews
