Ecological validity
Can it be generalised beyond setting of study to other real settings
Population validity
Can it be generalised to target population
Temporal validity
Extent to which findings remain true overtime and can be generalised to other time periods
E.g Aschs research in which participants confirmed moment in time
Face validity
Independent psychologist in same field looks at experimental conditions eg question as in a questionare
To see if they look like they measure what they intend to measure
If researcher says yes then the research has said to have face validity