for me personally... I never took any diagnostic test or anything for one good reason, the questions from kaplan / topscore or whatever are not representitive like the real DAT... However, they are great studying tools, meaning, after you miss a question, read the explanation and try to figure it out for urself, great for learning and strengthening weak areas
as matter of fact, I never took any practice tests (the way theyr supposed to be taken - ya know sitting down for 5 hours taking 1 darn test), I insteat only took the 3 topscore exams on the sciences ONLY UNTIMED lol and the barrons CD which comes with barrons 2nd edition DAT book.
Let me tell you, NONE of the biology from those tests was ANYTHING like the biology on my DAT, thats why I say those mockup exams aren't representitive. However, I will say one good thing about them, those mockup exams, are GREAT tool to build up your testing endurance (ability to sit down and take a 4-5 hour exam without getting too tired)..... This is probeblly why I got an 18 on QR when I have a minors in MATH from my initial undergrad.
Now that I am finally done with the DAT (and never have to look at it again lol) If there is one thing I would do differently, it would be to take more mockup exams, not because I wanna see how I am going to do, but rather to build up a good testing endurance
By the way, when I did those untimed topscore tests, here is what I got
BIOLOGY: 21 / 21 / 19
GC: 18/19/19
OC 18/19/ got too lazy on 3rd and didn't do it
On the 2 Barrons, I got
BIOLOGY: 21/21
GC: 18/18
OC 19/20
On the real DAT, I got
BIOLOGY: 21
GC: 24
OC 21
