Paul L Morgan, Adrienne D Woods, Yangyang Wang, George Farkas, Marianne M Hillemeier, Cynthia Mitchell
Which Students With Disabilities are Placed Primarily Outside of U.S. Elementary School General Education Classrooms?
Journal of learning disabilities
structure woodcockjohnson cognitive batterythird edition wj cog extensively explored via confirmatory factor analysis cfa normative sample little research verify structure holds students referred special education services likewise research structure wj cog exploratory factor analysis efa methods rare consequently study applied efa cfa methods scores 529 elementary school students referred special education services 955 eligible 14 tests wj cog extended battery efa results suggested 2 3 factors whereas cfa results favored theoretical 7 factors posited mcgrew woodcock theoretical model strong general factor accounted 27 total variance 57 common variance whereas 7 group factors combined accounted 21 total variance 43 common variance reliability quantified h good general factor marginal gs factor poor group factors nine 14 wj cog tests displayed uniqueness values exceeded communality basis evidence referral sample interpretation wj cog restricted gs g factors gs factor exhibited considerable independence precision measurement g factor emerged investigations wj cog