Flashcards in AS RESEARCH METHODS- reliability- validity Deck (23):
what does validity refer to?
soundness or legitimacy of a measurement or study
what should you do in an exam if asked to define validity|?
explain what both internal and external validity are
what is external validity?
the extent to which the results of a study can be generalised to other situations and people
what is internal validity?
whether the researcher tested what he/she set out to test
what are the other types of validity? (4)
mundane realism, experimental realism,ecological validity, population validity
what is mundane realism?
the extent to which features of a study mirror the real world
what is experimental realism?
the extent to which ps believe in the experimental set up and so will behave naturally
what is ecological validity?
the extent to which the research setting where the experiment took place mirrors the real world and therefore whether the study can be generalised to the real world
what is population validity?
whether or not the sample used in the study is representative of the wider population e.g student not necc rep adults
what is meant by threats to validity?
things that might reduce the validity of the study
what are the threats to validity? (4)
controlled setting/contrived research setting
social desirability bias
what is a dc?
a cue that makes p aware of way in which experimenter expect them to behave leading to unnatural b
what is a ev?
any variable other than independent variable that might effect d variable e.g time of day ,temp etc
what is a social desir?
p change behaviour in order to appear in a better light
what is reliability?
concerns consistency of results
what is external reliability?
measure of consistency over several occasions e.g should find same results if study replicated -e.g test retest method
what is internal reliability?
extent to which something is consistent with itself e.g all questions on questionnaire should measure same thing
what is the test-re test method?
repeating study on another occassion
what is reliability in experimental research?
ability to replicate study and obtain the same results using test retest method
what is reliability in observational techniques?
assessed by measuring inter rater reliability
what is reliability in self report?
internal reliability can be assessed using split half method which involve comparing persons performance on 2 halves of a test t check that they match up. to assess external the result should repeat after a period of time
what is inter rater reliability?
extent to 2 observers find same results. correlations should be higher than 0.8