Validation of the Intelligibility in Context Scale for Jamaican Creole-Speaking Preschoolers

• DOI: 10.1044/2016_ajslp-15-0103
• Publication Date: 2017-05-24T22:31:07Z
• Authors: Karla N. Washington; Megan M. McDonald; Sharynne McLeod; Kathryn Crowe; Hubert Devonish
• Keywords: Intelligibility (philosophy); Inter-Rater Reliability

To describe validation of the Intelligibility in Context Scale (ICS; McLeod, Harrison, & McCormack, 2012a) and ICS-Jamaican Creole (ICS-JC; 2012b) a sample typically developing 3- to 6-year-old Jamaicans.One-hundred forty-five preschooler-parent dyads participated study. Parents completed 7-item ICS (n = 145) ICS-JC 98) rate children's speech intelligibility (5-point scale) across communication partners (parents, immediate family, extended friends, acquaintances, strangers). Preschoolers Diagnostic Evaluation Articulation Phonology (DEAP; Dodd, Hua, Crosbie, Holm, Ozanne, 2006) English Jamaican establish speech-sound competency. For this sample, we examined validity reliability (interrater, test-rest, internal consistency) evidence using measures production: (a) percentage consonants correct, (b) vowels (c) phonemes correct.ICS ratings showed preschoolers were always (5) usually (4) understood (ICS, M 4.43; ICS-JC, 4.50). Both tools demonstrated excellent consistency (α .91), high interrater, test-retest reliability. Significant correlations between two each measure language-specific correct provided criterion-validity evidence. A positive correlation age further strengthened for that measure.Both show promising describing functional group preschoolers.