I took one in HS, don't recall which, and the old S-B and modified S-B back in college during psych classes (got within two points on those two tests, and was essentially the same score I got in HS, hmph). Age biasing (weighting) was added because most people would see their score reduce as they got older (various studies showed that, along with various rationale as to why it was true). In college I had some understanding of the tests and thought behind them, all lost in the lists of time now, alas. I am not about to take this one, don't need nobody tellin' me how stupid I've grown, have wife and kids for that. Way too long since my pre-med classes, and I became a hairy-knuckled engineer instead of a medical doctor.