I have a test that measures Impulse Control in children & adolescents (high scores= good impulse control; low scores = poor impulse control). I give the test to a group of 5 year olds, a group of 8 year olds and a group of 11 year olds. If my test is actually measuring impulse control, what should I observe? Average scores for each group should be about the same Average scores for the groups should increase as age increases. Average scores for the groups should decrease as age increases. What