In an earlier study (Koretz, 1997), we reported that Kentucky had been unusually successful in testing most students with disabilities, but we found numerous signs of poor measurement, including (semanticscholar.org)
Reporting bias and underreporting in particular are significant problems in research investigating sensitive topics like abuse and parenting, and these problems are further compounded by poor measurement instruments. (link.springer.com)
Emanuel, who has literally written the book on convection, states «But the physics of the processes controlling water vapor in the atmosphere are poorly understood and even more poorly represented in climate models, and what actually happens in the atmosphere is largely unknown because of poor measurements. (realclimate.org)