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      • The Phonetic and Linguistic Environment of Third Singular Allomorphs in Parent Input

        Colleen E. Fitzgerald,Rebecca C. Wettstein,Rebecca L. Ebert,Shannon M. Bridges 한국언어재활사협회 2018 Clinical Archives of Communication Disorders Vol.3 No.2

        Purpose: The third person singular present tense morpheme (3s) has a protracted course of development for children with language disorders and for typically developing children compared to other phonetically or linguistically similar morphemes. This study’s objective is to describe the phonetic and linguistic environment of 3s allomorphs in parent input. Methods: Participants were 14 monolingual English-speaking parents of typically developing toddlers. Parents’ allomorphs of 3s were examined for sentence position, allomorph type, coda of the inflected verb, onset of the following word, and the verb’s input frequency both before and after the toddlers first used 3s. Results: At both measurement points, the majority of instances of 3s were sentence medial, took the form of an/s/or/z/allomorph, and both followed and preceded non-sibilant consonants. At the second measurement point, when emergence of 3s had begun for all children, parents inflected a significantly greater number of different verb types with 3s. Parents also inflected a greater number of verbs with low frequency in parent input at Time 2, as demonstrated through the calculation of a Weighted Verb Diversity score. Conclusions: The findings of this study are both compatible with previous investigations of phonetic and linguistic environment and also build on those findings by examining the environment in greater detail. Speech-language pathologists could consider selecting target verbs that are intransitive and end with sibilants to increase the salience of the 3s morpheme for clinical populations at risk for delayed acquisition of the 3s morpheme.

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        REVIEW : Barrett`s Esophagus and Cancer Risk: How Research Advances Can Impact Clinical Practice

        ( Massimiliano Di Pietro ),( Durayd Alzoubaidi ),( Rebecca C Fitzgerald ) The Editorial Office of Gut and Liver 2014 Gut and Liver Vol.8 No.4

        Barrett`s esophagus (BE) is the only known precursor to esophageal adenocarcinoma (EAC), whose incidence has increased sharply in the last 4 decades. The annual conversion rate of BE to cancer is significant, but small. The identification of patients at a higher risk of cancer therefore poses a clinical conundrum. Currently, endoscopic surveillance is recommended in BE patients, with the aim of diagnosing either dysplasia or cancer at early stages, both of which are curable with minimally invasive endoscopic techniques. There is a large variation in clinical practice for endoscopic surveillance, and dysplasia as a marker of increased risk is affected by sampling error and high interobserver variability. Screening programs have not yet been formally accepted, mainly due to the economic burden that would be generated by upper gastrointestinal endoscopy. Screening programs have not yet been formally accepted, mainly due to the economic burden that would be generated by widespread indication to upper gastrointestinal endoscopy. In fact, it is currently difficult to formulate an accurate algorithm to confidently target the population at risk, based on the known clinical risk factors for BE and EAC. This review will focus on the clinical and molecular factors that are involved in the development of BE and its conversion to cancer and on how increased knowledge in these areas can improve the clinical management of the disease. (Gut Liver 2014;8:356-370)

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