by StaceyKoprince Wed Apr 18, 2012 3:55 pm
Sorry I'm just getting to this now - I was out all last week. I hope you did well on your test!
In general, the standard deviation on our test is about 50 points from last practice test to official test. That's a pretty wide variation (the real test is about 30 points, though, so we're proud that we've gotten that close to the real test!) - and one of the major factors I've found anecdotally to matter is whether you took the practice tests under 100% official conditions.
People who skip essays, take longer breaks than allowed, use the pause button, etc., are more likely to see score drops on Real Test Day (because now they can't use any of those artificial advantages). People who take the tests under totally official conditions are more likely to see real test scores that are fairly close to practice scores.
Other things that can cause score drops:
- messing up the timing badly
- tiring out / burning yourself out in the last few days (so that your brain "crashes" during the real test)
- serious nerves / anxiety (causing physical reactions - racing heart, can't breathe, etc)
I'm noticing in your scores that your quant was pretty steady (48 to 51) but your verbal varied more widely (39 to 45 on the last 2 tests alone). For anyone else in a similar situation, ideally, you want to try to figure out why any wide swings are happening. If you know why, then you can try to figure out how to keep yourself towards the higher end of the score swing on Real Test Day.
Re: penalty for wrong answers, there isn't a uniform penalty for these kinds of tests. It depends entirely on what your score is to that point in the test, what the difficulty level of the question is, what else has been happening (eg, strings of wrong answers have the effect of "accelerating" the penalty), etc. We try to mimic as much as we can, but the real algorithm is not published so nobody knows for sure what the exact numbers are like on the real test.
Stacey Koprince
Instructor
Director, Content & Curriculum
ManhattanPrep