issues in psychological research Flashcards
what does it mean if a test measures what it claims to measure
it is valid
what does it mean if a test doesn’t measure what it’s supposed to measure
lacks validity
what does it mean if a test doesn’t measure what it claims to measuring
lacks validity
how can results be valid
no extraneous or confounding variables
two ways a study can lack validity
- the method of measurement doesn’t measure what it claims to measure
- there are extraneous and confounding measurements that affect the measurement
what are the two ways of assessing validity of a psychological test
face validity
concurrent validity
how do you assess face validity
look at the test to see if it appears to measure what it claims to measure
how do you assess concurrent validity
compare the results obtained to a previous test of the same behaviour, that is known to be valid
two reasons why a study can lack external reliability
- there are extraneous variables affecting the measurements
- the test or questionnaire used to measure the DV is itself unreliable
what does internal reliability mean?
the individual items within a test are consistent with each other
what does external validity mean?
the results of the test are consistent every time it is repeated
what does the split half method assess?
assesses internal reliable of a test or questionnaire
what does a split half method test
internal reliability, by splitting the tests items into two and comparing the results to see if the results are consistent
what is test re test method a test of
test of how externally reliable a test of questionnaire is
what is the test retest method
a separate method in which the researcher gets the same participants take the same questionnaire or test on two separate occasions and compares the results obtained both times
