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The commissioner of the statistical arm of the U.S. Department of 91制片厂视频 says his office should not have initiated a recent, heavily publicized study comparing the academic performance of public and private school students because the report relied on a subjective analysis that could lead outsiders to question the research center鈥檚 impartiality.
Mark S. Schneider, the commissioner of the National Center for 91制片厂视频 Statistics, said last week that he was not faulting the study鈥檚 accuracy or methodology. But he said it was not proper for the research office to have directed a study that went so far in making judgments about how to interpret raw school data.
He also said he had the same concerns about the NCES directing a similar study of charter school performance, expected to be released later this month.
鈥淭his is not what we should be doing,鈥� Mr. Schneider said of the study of public and private schools, in an interview. 鈥淚t鈥檚 one thing for [an academic researcher] to put out a study. That鈥檚 a totally different story than if NCES, as a statistical agency, is weighing in on that front.鈥�
The commissioner voiced his reservations about NCES鈥� involvement in the public and private school study at an Aug. 4 meeting of the National Assessment Governing Board in McLean, Va., and elaborated on those comments in an interview with 91制片厂视频 Week afterward. The governing board is the independent body that sets policy for the National Assessment of 91制片厂视频al Progress, or NAEP, which the NCES administers.
The report on public and private schools, which received widespread attention when it was released last month, showed public school students outperforming their private school peers in reading and mathematics, when researchers adjusted for race, socioeconomic status, and other characteristics. The findings were vigorously challenged by supporters of private schools and vouchers, who argued that the study鈥檚 results would have been different if other student characteristics had been chosen.
Mr. Schneider had no say in NCES鈥� decision to conduct the private school and charter school studies. Those projects were initiated by Robert Lerner, Mr. Schneider鈥檚 predecessor. Mr. Lerner could not be reached for comment.
The NCES is one of three researcher centers housed within the Institute of 91制片厂视频 Sciences, an independent federal research agency established by Congress in 2002. Although the institute is a part of the U.S. Department of 91制片厂视频, it is supposed to conduct its work free of political influence. The IES director can prepare and publish any research without the approval of the education secretary. While the directors of two of the institute鈥檚 research centers are appointed by the IES director, the NCES commissioner is appointed by the president. Both Mr. Lerner and Mr. Schneider were appointed by President Bush; while Mr. Lerner was never confirmed by the U.S. Senate, Mr. Schneider was confirmed last October. His term expires in June 2009.
A Departure
Henry Braun, a senior educational researcher for the 91制片厂视频al Testing Service, a nonprofit research and testing organization in Princeton, N.J., led the public and private school study for the federal statistical agency. It relies on a popular technique known as hierarchical linear modeling, or HLM, which allows researchers to evaluate not only overall data from schools, but also that of smaller, individual groups of students with different characteristics. Using that technique, however, requires researchers to choose which variables to consider鈥攕uch as race, gender, and various measures of socioeconomic status鈥攁s the ETS did on the study of public and private schools. Although it is common for outside researchers to crunch federal data using the HLM method, the NCES has typically not engaged in such work, Mr. Braun and others said.
鈥淚 think it was clear from the beginning that this was something of a departure for NCES,鈥� said Mr. Braun of his study. He said he did not have an opinion on whether the statistical agency should direct research using those methods.
Mr. Schneider emphasized that he was not questioning the merits of that NCES report. 鈥淚t is a very high-quality study.鈥� But the commissioner said in the future he would not support having the NCES produce a report in which researchers made similarly subjective judgments about which student characteristics to consider. A few weeks after the publication of Mr. Braun鈥檚 study, Paul E. Peterson, a professor of government at Harvard University, analyzed the data using different variables and found that private school students鈥� performance topped that of public school students. (鈥淒ata Reanalysis Finds Test-Score Edge for Private Schools,鈥� Aug. 9, 2006.)
鈥淥ur job is to collect the data and get it out the door,鈥� Mr. Schneider said in the interview. The problem, he said, is that in studies like the private school report, 鈥測ou鈥檙e always having to make choices about variables,鈥� he added. 鈥淚t鈥檚 not something where the models spring from heaven.鈥� The statistical center鈥檚 message to the research community, Mr. Schneider said, should be, 鈥渨e鈥檒l give you the data you want. What you do with it is your business.鈥�
The upcoming NCES-sponsored study of charter schools relies on similar methodology, Mr. Schneider noted. Recent studies of charter schools, using federal data, have ignited fierce debates between defenders of those programs and critics, including teachers鈥� unions.
鈥淚 know there will be a firestorm in three weeks,鈥� Mr. Schneider told the governing board, in reference to the charter school report.
鈥楶rovide the Raw Material鈥�
The director of the Institute of 91制片厂视频 Sciences, the independent federal research agency that oversees the statistical center echoed Mr. Schneider鈥檚 opinion. In an e-mail, IES Director Grover J. 鈥淩uss鈥� Whitehurst, said studies using the HLM and similar analytic methods are 鈥渘ot a priority鈥� for the NCES, because they take time away from other projects, and private-sector researchers have the ability to conduct the same work. Mr. Whitehurst also noted that such interpretive reports almost always produce debates about the methodology used.
鈥淭here are typically several legitimate ways to carry out complex data analyses,鈥� Mr. Whitehurst wrote in an e-mail. 鈥淓xperts will differ on which approach is best and how the results should be interpreted. 鈥� Advocacy groups that don鈥檛 like the results will frequently assert that the analytic approach was biased. It is best for NCES, as a federal statistical agency, to stay out of that fray.鈥�
Gerald E. Sroufe, the director of government relations for the American 91制片厂视频al Research Association, a professional association in Washington, said he agreed that the NCES should avoid the sort of analysis put forward by the study of public and private schools. Such projects leave the research center open to charges that it is harboring an agenda, said Mr. Sroufe, whose organization represents 25,000 educators and researchers.
鈥淚t should provide the raw material,鈥� Mr. Sroufe said of the NCES. Having the statistical center produce studies using HLM and similar methods 鈥渋s probably not a good idea, particularly involving work that is so politically sensitive,鈥� he said.
The study on public and private schools came out the week before Secretary of 91制片厂视频 Margaret Spellings and Republican lawmakers unveiled a new, $100 million proposal to make vouchers for private school tuition available under the No Child Left Behind Act. Critics have cited the NCES report showing public school students outperforming their private school peers, in questioning the wisdom of that voucher proposal.
Despite those debates, Mr. Schneider said his concerns about the NCES鈥� involvement with the private school study were his own, and that Bush administration officials did not try to influence his views on the subject.
鈥淭he NCES,鈥� he said, 鈥渋s quite insulated from that kind of political pressure.鈥�
