ecological validity ecological validity ecological and external validity ecological validity validez ecológica http://en.wikipedia.org/wiki/Ecological_validity Ecological validity ecological validity ecological validity ecological validity http://en.wikipedia.org/wiki/Ecological_validity ecological validity legge det tett til hverdagspraksis http://en.wikipedia.org/wiki/Ecological_validity ekologiskavaliditet http://en.wikipedia.org/wiki/Ecological_validity ecological validity