I LOVE this feature and want to know more about the ultimate purpose.  The reason I ask is that I tend to be overly confident with Logical Reasoning and Reading Comp (major was English/Literature).  With June test day approaching, I am thinking I should work diligently to improve upon these strengths to bolster my weakness in Logic Games.  To that end, will this feature allow Khan to help me identify patterns in my flaws?  I have understood every incorrect answer so far, the result of slight oversights more than misunderstanding of the content.  I would be thrilled if this feature could help me to look out for my pitfalls of overconfidence to, again, enhance my strengths to compensate for my weakness.  I am thinking to be brilliant in these areas will be my only hope of a respectable score on test day (to make up for my shortcomings in the Logic Games).