Original percentiles (July 2011 test date) (sent with original scores): V 93%; Q 77%; W 67%
New percentiles (from Concordance Tables & now on my ETS site): V 91%; Q 71%; W 73%
Interestingly, the Interpretive Data Chart in the ETS Guide to the Use of Scores 2010-11, for the original percentiles indicated that they were "Based on the performance of all examinees who tested between July 1, 2006, and June 30, 2009."
The Concordance Tables for the prior scale/new scale and percentile rank on which the revised percentiles are based, indicates that the percentiles are "Based on the performance of all examinees who tested between August 1, 2011 and April 30, 2012. percentile ranks will be updated in July 2013."
So - instead of being "compared" with a 3-year sample for percentile purposes, it appears that the "old" scores are now being compared to an 8-month sample of new test takers - this simply does not seem statistically sound!
