Protocol for the Evaluation of Speech Intelligibility in Dysarthrias: Evidence of Reliability and Validity

Folia Phoniatrica Et Logopaedica : Official Organ of the International Association of Logopedics and Phoniatrics (IALP)
Simone dos Santos Barreto, Karin Zazo Ortiz

Abstract

Studies about the reliability and validity of intelligibility measures are fundamental to direct their use and interpretation in both clinical and research settings. The present study assessed inter-rater reliability, internal consistency and criterion validity of scores for the sentence and word subtests of the Protocol for the Evaluation of Speech Intelligibility (PESI). This study included 180 adult volunteers who were divided into three groups: 30 speakers with dysarthria, 30 control speakers and 120 listeners. Intelligibility scores were calculated according to the percentage of words correctly transcribed in each subtest: words in sentences and single words. The intelligibility measurements exhibited a high level of inter-rater reliability for sentences [intraclass correlation coefficient (ICC) = 0.94] and for single words (ICC = 0.96). The items from the single words subtest of the PESI revealed high internal consistency (Cronbach's alpha = 0.93). The measurement of intelligibility of sentences and single words had a high discriminatory power (0.82 and 0.95, respectively), with high sensitivity and specificity, particularly for scores in the single words subtest. This study provides preliminary evidence of the reliabilit...Continue Reading

Citations

Apr 25, 2019·Folia Phoniatrica Et Logopaedica : Official Organ of the International Association of Logopedics and Phoniatrics (IALP)·Simone Dos Santos Barreto, Karin Zazo Ortiz

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