There is no scientifically valid test to detect food intolerance, according to an Irish authority that regulates medical devices. (foodnavigator-usa.com)
«It's easier to create a statistically valid test for content or for content - related mental processes, whereas it is difficult to measure... (educationworld.com)
Prior to 2013, when Common Core testing was introduced, New York students had posted much larger gains on the local state tests than on national tests, calling into question how valid test score gains were during the Bloomberg administration. (educationbythenumbers.org)