Communication Matrix

The Communication Matrix details the earliest stage of communication behavior in children with severe and multiple disabilities, with seven levels, pre-intentional behavior (I), intentional behavior (II), unconventional communication (III), conventional communication (IV), concrete symbols (V), abstract symbols (VI) and language (VII). The primary level indicates the level at which the child/youth is operating predominantly. Total Percent is calculated using the total score of each item divided by the maximum possible score (= 160, each item scores from 0 to 2). The psychometrics showed good inter-observer reliability and adequate content validity [33].
