Authors Arx, Lemola, and Garb conducted an experiment to see if different intelligence tests would yield similar results for children. They base their assumptions off previous research that suggests that most standardized tests measure similar underlying concepts which makes them all valid. They do note however, that some tests require different skills such as object manipulation or a greater focus on literacy. Despite this, results should generally be similar. The experiment conducted was taking 5 standardized German intelligence tests and administering each to a set of 206 typically…