Treatment intensity in acquired apraxia of speech (Wambaugh et al., 2018)

<div><b>Purpose:</b> This investigation was designed to examine the effects of treatment intensity (i.e., dose frequency) on the outcomes of Sound Production Treatment (SPT) for acquired apraxia of speech.</div><div><b>Method:</b> Five men with chronic apraxia of speech and aphasia received both intense SPT (3 hr per day/3 days per week) and nonintense/traditional SPT (SPT-T; 1 hr per day/3 days per week) in the context of single-case experimental designs. Each treatment was applied separately to a designated set of experimental words with 1 treatment applied at a time. Twenty-seven treatment sessions were conducted with each phase of treatment. Accuracy of articulation of target sounds within treated and untreated experimental words was measured during the course of the investigation.</div><div><b>Results:</b> All participants demonstrated improved articulation with both treatment intensities. Better maintenance of gains for treated items was found with SPT-T for 2 participants as measured at an 8-week posttreatment retention probe. Superior maintenance of increased accuracy of production of untreated items was also observed with SPT-T for all participants.</div><div><b>Conclusion:</b> A less intense (distributed) application of SPT facilitated better maintenance of improved articulatory accuracy for untreated items, and in some cases treated items, than intense SPT.</div><div><br></div><div><b>Supplemental Material S1.</b> Examples of participants’ discourse: pretreatment samples (Nicholas & Brookshire, 1993). </div><div><br></div><div><b>Supplemental Material S2.</b> Probe and treatment stimuli. </div><div><br></div><div><b>Supplemental Material S3.</b> Sound Production Treatment (SPT) treatment log (minimal pair). </div><div><br></div><div>Wambaugh, J. L., Wright, S., Boss, E., Mauszycki, S. C., DeLong, C., Hula, W., & Doyle, P. J. (2018). Effects of treatment intensity on outcomes in acquired apraxia of speech.<i> American Journal of Speech-Language Pathology, 27</i>(1S), 306–322. </div>