External validity is a measure of how readily youc an generalise a statement or research. High external validity implies you can make a very broad statement.
Technically we would say you have high external validity if you are basing your statement on a large number of observations. For example, if the caravan you buy from a pikey doesn’t make it out the gate, and its the only thing you have ever bought from a pikey, and you claim that all Pikeys are thieving dishonest con artists, your statement has very low external validity.
On the other hand a consumer report which collected a sample of 1,000 customer satisfaction reports from people who bought caravans from pikeys would have a much higher external validity.
So the next time you stereotype or generalise (as we are all [especially me] prone to do), think of exactly how many observations you have and consider your external validty.
3 thoughts on “The next time you stereotype, think external validity.”
Yes, yes it does.
does that work if you transpose bus for caravan, pikey for fuller?
Goiz! You reminded me of Dad when I read this post.