types of validity

what is internal validity?

the degree to which data in a study reflects a true cause-effect relationship

what is external validity?

the degree to which the investigator can extend or generalise a study’s results to other people, times and situations

what is face validity?

does the test actually measure what it claims to? (subjective and a weak form of internal validity)

what is concurrent validity?

the degree to which a new test correlates with an established test of known validity. thus validating the claims of the research (form of internal validity)

what is ecological validity?

the degree to which the data is generalisable to the real world, based on the conditions research is conducted under and procedures involved.

what is population validity?

the degree to which findings generalise from the sample studied to the target population

what is temporal validity?

the degree to which research correlates with the time period. high when research findings successfully apply across *time* (certain variables in the past may no longer be relevant now or in the future).