958e0dfc_for_Students_with_Disabilities__Term
[Definition] An unsystematic error; a quantity (often indirectly observed) that appears to have no relationship with any other variable. Related to reliability and the standard error of measurement. [Source] American Educational Research Association, American Psychological Association, & National Council on Measurement in Education. (1999). Standards for educational and psychological testing. Washington, DC: American Educational Research Association, p. 180. [Term] 
Random error
Tool Kit on Teaching and Assessing Students With Disabilities: Models for Large-Scale Assessment for Students with Disabilities
Term