The Benefits of Robustness in Measures of Spatiotemporal Stability: An Investigation in Childhood Apraxia of Speech.
Purpose: When using the spatiotemporal index (STI) to measure variability across repetitions of the same stimulus, researchers will typically screen and remove productions that contain errors or disfluencies. However, this screening process is highly subjective, reduces the amount of data available,...
| Publicado en: | Journal of Speech, Language & Hearing Research Vol. 68; pp. 3495 - 3507 |
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| Autores principales: | , , |
| Formato: | Artículo |
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American Speech-Language-Hearing Association
2025 Supplement
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=187102501&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 187102501 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 10924388 1SM jtl: Journal of Speech, Language & Hearing Research issn: 10924388 maglogo: N pubinfo: dt: 2025 Supplement vid: 68 pid: 42 pub: American Speech-Language-Hearing Association artinfo: ui: 187102501 10.1044/2024_JSLHR-24-00360 ppf: 3495 ppct: 12 formats: fmt: @attributes: type: P size: 1.1MB tig: atl: The Benefits of Robustness in Measures of Spatiotemporal Stability: An Investigation in Childhood Apraxia of Speech. aug: au: Wisler, Alan Vuolo, Janet Fletcher, Annalise affil: Department of Mathematics and Statistics, Utah State University, Logan Department of Speech and Hearing Science, The Ohio State University, Columbus Department of Communicative Disorders and Deaf Education, Utah State University, Logan su: Sound recordings Social classes Children Research funding T-test (Statistics) Descriptive statistics Physiological aspects of speech Simulation methods in education Speech evaluation Speech apraxia Video recording sug: subj: Sound recordings Social classes Children Sound recording merchant wholesalers Record Production Integrated Record Production/Distribution Research funding T-test (Statistics) Descriptive statistics Physiological aspects of speech Simulation methods in education Speech evaluation Speech apraxia Video recording ab: Purpose: When using the spatiotemporal index (STI) to measure variability across repetitions of the same stimulus, researchers will typically screen and remove productions that contain errors or disfluencies. However, this screening process is highly subjective, reduces the amount of data available, and may generate samples that are less representative of true speech difficulties. In this study, we quantify the degree to which the STI is skewed by the inclusion of highly deviating productions and whether alternative calculations could better facilitate their inclusion. Method: First, we conducted a controlled simulation to quantify how highly deviating productions skew STI values. The traditional STI calculation was compared to three robust alternative measures proposed to reduce the influence of outlying productions. Next, using audio recordings from typically developing (TD) children and children with childhood apraxia of speech (CAS), we investigated how effectively each STI measure differentiated the two groups. Results: Simulation findings demonstrated that the STI can be heavily skewed (more than doubling in value) by the inclusion of a single outlying production. In contrast, the robust alternative measures were all able to incorporate multiple outlying productions before their value was significantly altered. The proposed best-5 STI measure produced larger group differences between TD children and children with CAS compared to the traditional STI in both "Mom pets the puppy" and "Buy Bobby a puppy" stimuli. Conclusions: The STI is highly sensitive to outlying productions and requires careful consideration of the repetitions included in its calculation. However, conservative approaches to data removal may be problematic when studying populations that are prone to fluency errors. In these scenarios, more robust alternatives to the STI, such as the best-5 STI measure, may provide a more practical approach to measuring speech variability. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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