I am conducting a study within the ASD population that is looking at IQ, executive function and adaptive skills for which of them I am collecting data using different tests. I am looking first at the association between IQ and executive function, then I want to look at the difference in executive function between low and high IQ and also how adaptive skills are associated to executive function, however I am very confused about what analysis I should use. If anyone could help please...

Many thanks!

J.