The College Board has announced that an additional 27,000 tests from last October's SAT weren't properly checked for errors.
The discovery, made public Wednesday, follows recent announcements that some students were mistakenly given lower scores on the test than they deserved.
Of the 27,000 unchecked tests, 375 were found to have incorrect scores. In total, 4,411 students have had their scores reported incorrectly.
Penn's Dean of Admissions Lee Stetson said that a small number of students 375 whose scores were most recently discovered to be incorrect applied to Penn.
Only around 400 of the 4,411 tests had score errors of 100 points or more, said Brian O'Reilly, executive director of information services at the College Board.
After the College Board discovered the initial batch of misscored tests, Penn was informed that 103 of its applicants had been affected.
The misscorings resulted from excessive moisture on the answer sheets due to rain on the testing day, which interfered with scoring machine readings.
In response to the mishaps, FairTest, an organization that works to stop the misuse of standardized tests, is calling for an independent investigation of the incident.
Monty Neill, the organization's executive director, said the College Board should pay an independent body to examine the recent issues. He added that this group should then report results to the public.
The College Board has hired the consulting firm Booz Allen Hamilton Inc. to conduct an investigation, but Neill maintains that problems arise when results of investigations are filtered to the public through the testing companies themselves.
The investigation will focus primarily on the test's scanning process, which is handled by Pearson Educational Measurement, part of media group Pearson PLC.
Neill said there also needs to be "ongoing regulation" of the testing industry.
The College Board itself has decided to implement measures to prevent misscores from occurring in the future, such as improving software to catch moist answer sheets and scanning answer sheets more than once.
But Neill said the mishap has made it clear that the SAT should be optional for college admissions and that it should "at most be a minor part."
The College Board hasn't yet received feedback from college admissions officials about the implications of these latest changes, O'Reilly said, adding that colleges to which affected students applied have been notified.
He said he expects admissions officials to have a "mixed reaction" to the situation, being both grateful for the College Board's efforts and frustrated by the extra complication these errors entail.
