Validação de um modelo linguístico fuzzy para classificar a gravidade do desvio fonológico

Abstract

. The concept of Model is an analytical structure which studies the relationships among a number of variables. It is composed by hypotheses which are the foundation for the extraction of implications and predictions. To be useful, the model has to present a simplified and abstract version of the reality 6 . On a study 5 , a Fuzzy Linguistic Model was developed in order to classify the severity level of the phonological disorders regarding quantity. The theoretical foundation was based on the Features Complexity Implicational Model (FCIM) 7,8 . The mathematical models, as the one from this study 5 , are built from a well-known and widely studied mathematical theory. When it is efficient, the model allows researchers to elaborate predictions, ABSTRACT Purpose: to check if the criteria adopted from the Fuzzy Linguistic Model to classify the severity of Phonological Disorder (PD) are employed in the practice of speech and language therapists and whether they are in conformity with the purpose of such model. It is furthermore intended to analyze the acquiescence between PD severity classified by the Model and the one deemed by speech and language therapists and check the main difficulties. Method: the study included two samples. The first one was comprised of a representative number of deviating phonological systems (n=52) and classified by the Model when it was proposed. The second one comprised two groups of speech and language therapists GF-I and GF-II. The speech and language therapists were asked to deem the severity of deviating in phonological systems, mapped in the Implicational Model of Feature Complexity -MICT as Severe, Moderate-Severe, Moderate-Mild, and Mild. Next, criteria and main difficulties were described in a questionnaire. Kappa statistics was used, with a significance level of p<0.05. Results: the criteria used in the proposal were generally used by GF-I and considered as adequate by GF-II. There was an acquiescence between classification of severity obtained by the Model and the one deemed by the speech and language therapists. The most frequently reported difficulty was distinguishing between intermediate degrees. Conclusions: the Fuzzy Linguistic Model criteria are used to classify PD severity when based on MICT. Furthermore, the criteria are in acquiescence with the purpose of the Model. Due to the difficulties, other forms of classifying severity can be added in order to characterize PD over other major aspects.

Comparação entre a classificação com base em traços e o percentual de consoantes corretas no desvio fonológico

“…The research validated that there was a high concordance index for the extreme PD levels, ranging from substantial to almost perfect. For the cases of moderate-severe and mild-moderate deviation (intermediate), the concordance was less relevant, ranging from regular to substantial 17 . Another study, which assessed the perceptual judgment of the severity levels, has noticed bigger accuracy and concordance when rating more extreme levels, namely mild and severe (for PD) 19 .…”

“…As for the disparity on the rating of the several PD levels, on which mild and severe levels show a bigger concordance while the intermediate levels show a bigger imbalance (Image 2), previous researches had already noticed a similar behavior. These researches also portray a greater similarity when rating more extreme levels and a larger discrepancy on the intermediate levels 10,12,13,[17][18][19] . That result was determined on a research using the Fuzzy Linguistic Model and the judgment of speech language pathologists 17 .…”

“…These researches also portray a greater similarity when rating more extreme levels and a larger discrepancy on the intermediate levels 10,12,13,[17][18][19] . That result was determined on a research using the Fuzzy Linguistic Model and the judgment of speech language pathologists 17 . The research validated that there was a high concordance index for the extreme PD levels, ranging from substantial to almost perfect.…”

Modelo de correlações entre consoantes: implicações para a prática clínica

“…However, these aspects have been highlighted as limitations to its application. Furthermore, the fact that the phonemes have been considered only in simple onset position also limits the use of this model in the choice of target segments for phonological therapy and to determine the severity of phonological disorders, as observed in other studies 4,5 .…”

Proposal and content validation of an orofacial myofunctional assessment protocol for individuals with cleft lip and palate

“…In several areas of health, the validation of assessment tools has been performed to obtain more accurate and reliable results (7)(8)(9) . In Speech-Language Pathology and Audiology, some studies validated assessment protocols for diverse populations (10)(11)(12)(13)(14) . Specifically for individuals with cleft lip and palate, the literature presents some validated instruments (14,15) , which cover aspects related to speech.…”