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The outcomes of remote administration of CAAST (Kallhoff et al., 2023)

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posted on 2023-06-21, 22:27 authored by Lydia Kallhoff, Pang Tao Moua, Daniel Salomon, Julie Wambaugh

Purpose: This study was designed to examine the outcomes of Combined Aphasia and Apraxia of Speech Treatment (CAAST) administered remotely in terms of acquisition and generalization effects and to compare these effects to previous in-person CAAST studies and Response Elaboration Training (RET)/Modified-Response Elaboration Training (M-RET) benchmarks.

Method: Multiple probe designs across participants and behaviors were employed with three speakers with chronic aphasia and apraxia of speech. Correct information units (CIUs) were the primary outcome measure to measure changes in language production. Percent consonants correct (PCC) was used as the secondary outcome measure to evaluate changes in speech sound accuracy. Production of CIUs was compared with existing benchmarks from Bunker et al.’s (2019) meta-analysis of previous RET/M-RET studies. In addition, both CIUs and PCC were compared with the most recent CAAST in-person studies.

Results: All participants demonstrated substantial increases in CIUs for treated and untreated picture sets, comparable to outcomes of in-person CAAST administration. These language changes were maintained at posttreatment intervals for all participants. PCC also improved for all participants, with gains in articulatory accuracy being maintained posttreatment.

Conclusions: Improvements in CIU production and PCC for all three participants were in keeping with results from Wambaugh et al. (2017). These findings provide additional support for the efficacy of CAAST and indicate that remote administration may be a viable alternative to in-person application.

Supplemental Material S1. Pre- and posttreatment discourse samples.

Supplemental Material S2. Instructions for rating interest in picture stimuli.

Supplemental Material S3. Experimental stimuli – verbs.

Supplemental Material S4. Combined Aphasia and Apraxia of Speech Treatment (CAAST) remote protocol.

Supplemental Material S5. Example CAAST slides used in treatment.

Kallhoff, L., Moua, P. T., Salomon, D., & Wambaugh, J. (2023). The outcomes of remote administration of Combined Aphasia and Apraxia of Speech Treatment: A single-subject experimental design study. American Journal of Speech-Language Pathology, 32(5S), 2402–2417. https://doi.org/10.1044/2023_AJSLP-22-00297

Publisher Note: This article is part of the Special Issue: Select Papers From the 51st Clinical Aphasiology Conference.

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