“…CBM-W measures vary in their scoring reliability. Inter rater reliability can be high, with 80-90% agreement (Gansle et al, 2006;Weissenburger & Espin, 2005) but this varies in relation to the types of texts produced, the age group of the pupils studied and the text measure that is used (Campbell et al, 2013;McMaster et al, 2012). Validity of the CBM-W has also been examined and some measures are correlated with standardised assessments (0.69 for Test of Written Language, Hammill & Larsen, 1996) and with teacher ratings (0.76, Parker et al, 1991).…”