Data of a single-case experimental study on teaching early phonics skills to students with ID and ASD who require augmentative and alternative communication.

The second column of the file indicates the measured outcome (the dependent variable). The two dependent variables in this study were (a) letter-sound-correspondence knowledge of a series of letters (a/A, r/R, u/U, i/I, l/L, f/F, and é/É) and (b) phonemic awareness (i.e., first-phoneme identification).

The third column ("Phase Name") indicates the phase name: baseline phase (before the introduction of the intervention), intervention phase, and maintenance (measures administered at least two weeks after the end of the intervention). The fourth column (“Session”) indicates the session (across all participants) at which the probe was collected. Sessions are standardized across participants, meaning they generically represent “dates” at which probes were collected across students, and not the actual number of probe sessions administered to every student (for example, baseline probes were collected at session 7 and 12 for Salim, but not in between).