Thomas Haladyna, a professor emeritus at Arizona State University, says test gains of 3 standard deviations or more for an entire grade are "so incredible that you have to ask yourself, 'How can this be real?' " Haladyna says such a spike in scores would be like finding "a weight-loss clinic where you lose 100 pounds a day."A useful read for those wondering just how they figure such things out.
In the past decade, similar score spikes uncovered by The Dallas Morning News and the Atlanta Journal-Constitution, using the same methods as USA TODAY, led state officials in Texas and Georgia to conduct major probes of hundreds of schools.
Monday, March 7, 2011
USA Today and "too good to believe" test scores
USA Today published a big article over the weekend after looking at test scores in Ohio, Michigan, Arizona, California, Florida, and Washington, D.C. on "Test Scores Too Good To Believe."