Validity + Reliability Flashcards
(13 cards)
Internal validity
Has the researcher measured what it has intended to measure?
External validity
Can the findings be generalised beyond the study?
types of internal validity
Face- does the research measure what it aims to
Construct - measuring all areas of a factor
Concurrent - ability to compare results with different measures e.g. experiments and observations
criterion - if one measure of a factor predicts the the value of another measure of the same factor
types of external validity
Population - can the results be generalised to other populations
Ecological - can the results be generalised beyond the situation to the real world
internal reliability
consistency between results through the test due to standardised procedure
external reliability
how consistent results are when test is repeated over time
what is inter rater reliability
consistency across observers and their results
how can you test reliability
test- retest
split half
test retest method
give pps the same test/questionnaire on two separate occasions to see if similar results are obtained.
if results are similar = high reliability
if results are not similar = low reliability
split half method
a test/questionnaire is spilt in half, pps should have similar results in each half
what are demand characteristics
when participants work out the aim of the study and then change their behaviour to fit the aim
what is social desirability
participants changing behaviour to seem acceptable in society
what is the difference between representativeness and generalisability
R: how typical is the sample when compared to the target population
G: can the findings of one sample be applied to another
