Here is another test. It is typically used to test the merits and characteristics of a interviewee. When asked to professionals, it has been reported that 90% get them wrong where as preschoolers get a higher % right. I think that shows that as we get older, we forget how to just do something straight forward, our egos make us want to over complicate things, to rush through tasks without seeing the small details and not seeing the wood for the trees.