Did anybody else recently receive the GRE practice invitation email from ETS to perform 7 practice tests "as a research study", each composed of 20 questions from the quantitative section of the GRE? If so, were the actual GRE questions similar to the practice tests? The email said that it is composed of real GRE questions and cover all content areas of the quantitative section of the GRE. Even though they said it "will not affect your GRE Test scores in any way," I have a feeling that it may actually be used to normalize the scores. Therefore, I am nervous about doing well on these practice tests since they may make my actual test harder. I experimented with purposely just answering all questions wrong in a set, but it seems like a multi stage test, as the next set of questions were almost identical to the previous. I may have to answer correctly to get to the hard questions.