| a | b | c | d | e | f | g | h | i | j | k | l | m |
| n | o | p | q | r | s | t | u | v | w | x | y | z |
External validity
External validity refers to whether the findings of a study really can be generalised beyond the present study. We can break external Validity down into two types.Population validity - which refers to the extent to which the findings can be generalised to other populations of people.
Ecological validity - which refers to the extent to which the findings can be generalised beyond the present situation.



