My first pass at the Brain Assessment (WebNeuro Test) resulted in a brain type of 10.  As I reflected on the questions and how I responded, It occurred to me that I had over-thought the options.  So several days later, I took another pass at it.  The result this time produced a brain type of 1 — seems like a polar difference (assuming a 10 point scale).  My question is:  how can I so easily go from 10 to 1?
Years ago I authored The Management Style Survey. It works by semantic differentials through forced selection of multiple mutually exclusive choices (4 in each set x 28 sets) and comparing the differences (noting the inconsistencies as well as the points of consistency) and graphing the results onto three separate Style Patterns.  The result was a very difficult survey to fake out.  Any attempt to randomly or arbitrarily plugin responses, results in a bunching of all four factors along the midline of each graph — a meaningless pattern.
My question:  How likely is it that one pass at the assessment is more valid than another?  Please advise.  Thank you.  ICG