https://dspace.ewha.ac.kr/handle/2015.oak/171565 2026-04-05T08:35:19Z 2026-04-05T08:35:19Z 김영태 https://dspace.ewha.ac.kr/handle/2015.oak/274954 2026-04-02T16:31:08Z 2026-01-01T00:00:00Z

Title: Comparing Location-Based and Category-Based AAC Interventions for Improving Communication Skills in Adolescents With Complex Communication Needs Ewha Authors: 김영태 Abstract: Adolescents with complex communication needs require interventions based on community communication skills for effective communication within the expanding scope of their lives. This study aimed to compare two augmentative and alternative communication (AAC) interventions by using script for their effectiveness in helping four adolescents with complex communication needs to express themselves in the community. The devices used in the study were a location-based and a category-based high-tech AAC device used in an alternative treatment design. The two intervention methods were alternated during the intervention phase of the study to determine the more effective one. The effect size was calculated using an improvement rate difference (IRD) analysis. Then, the more effective method was applied instead of the less effective one in the replication phase, within the setting where the less effective method had previously been employed, to assess its effectiveness. and effective AAC communication methods were employed within the community during the generalization phase. As a result of the interventions, all four participants showed increased accuracy of expression in the local community compared with the baseline, and the location-based tool showed greater treatment effects than the category-based tool. Additionally, the location-based device also showed generalization effects in the local community. The findings confirmed the efficacy of the two different AAC tools to improve the accuracy of expression among adolescents with complex communication needs, facilitating their integration into the community. © The Author(s) 2025

2026-01-01T00:00:00Z 성지은 https://dspace.ewha.ac.kr/handle/2015.oak/274779 2026-03-26T16:31:09Z 2026-01-01T00:00:00Z

Title: What Types of Noun– and Verb–Semantic Feature Analysis Treatment Are More Effective in Eliciting Treatment and Transfer Effects in Korean-Speaking People With Aphasia? Ewha Authors: 성지은 Abstract: Purpose: People with aphasia (PWA) experience lexical retrieval impairments, hindering effective communication. The semantic feature analysis (SFA) protocol, a specific semantically based lexical retrieval treatment, is widely used to improve naming abilities. This study applied SFA treatment to Korean-speaking PWA, a verb-final language, to compare the efficacy of noun-SFA and verb-SFA across various linguistic levels. Method: A total of 10 Korean-speaking PWA participated in this study. Participants were randomly assigned to either the noun-SFA or verb-SFA group. Preand post-assessments were conducted before and after 20 treatment sessions to evaluate the treatment and transfer effects across various linguistic domains. Results: Group comparisons indicated that near transfer effects to untreated items within the treated word class and nonverbal semantic association abilities were more robust in the verb-SFA group. Within-group analysis showed that both SFA treatments demonstrated significant direct treatment and near transfer effects on treated word class tests. However, near transfer effects to untreated word class tests were not significant in either group. For far transfer effects, the verb-SFA group showed greater gains in sentence-level tests. Aphasia severity improved in both groups, with more pronounced recovery in the verb-SFA group. Conclusions: The efficacy of verb-SFA treatment for Korean-speaking PWA can be attributed to the unique verb-final structure of the Korean language, where verbs and their thematic roles are emphasized at the end of sentences. This underscores the importance of considering language-specific factors when developing and implementing semantic-based treatments for PWA, particularly in verb-final languages. © 2025 American Speech-Language-Hearing Association.

2026-01-01T00:00:00Z 성지은 https://dspace.ewha.ac.kr/handle/2015.oak/274548 2026-03-19T16:31:07Z 2025-01-01T00:00:00Z

Title: Aging-Related Changes in Switching and Cluster Diversity in the Action Verbal Fluency Task Using Hierarchical Clustering Analysis Ewha Authors: 성지은 Abstract: Purpose: This study aims to establish objective verb clustering criteria in action verbal fluency (VF) using hierarchical clustering analysis (HCA) based on the Lancaster sensorimotor norms. We explored age-related differences in switching and cluster diversity (word retrieval strategies) between younger and older adults and correlations among age, education, working memory (WM) capacity, action VF performance, and word retrieval strategies for each group. Method: Sixty-two native Korean speakers participated in the study, with 31 young adults (M-age = 27.39) and 31 older adults (M-age = 70.45). Participants completed a 1-min action VF task, and generated verbs were classified into 15 clusters based on the Lancaster sensorimotor ratings using HCA. We analyzed switching (shifts between clusters) and cluster diversity (number of unique verb clusters) to assess word retrieval strategies. WM capacity was measured through word-forward and word-backward (WB) tasks. Results: Older adults demonstrated significantly fewer switchings and lower cluster diversity compared to younger adults, indicating restricted word retrieval strategies. WB task scores in older adults positively correlated with word retrieval strategies and action VF performance. Older individuals with younger age and higher education employed more word retrieval strategies. Both groups exhibited positive correlations between word retrieval strategies and action VF performance. Conclusions: The novel HCA approach, based on the Lancaster sensorimotor norms, successfully classified verb clusters that revealed aging-related differences in word retrieval strategies and the relationship between WM and these strategies. These results highlight the potential of using the HCA method for verb clustering analyses, particularly in providing qualitative insights into action VF tasks. Supplemental Material: https://doi.org/10.23641/asha.29396300

2025-01-01T00:00:00Z 성지은 https://dspace.ewha.ac.kr/handle/2015.oak/274535 2026-03-19T16:30:05Z 2025-01-01T00:00:00Z

Title: Cross-Linguistic and Multicultural Effects on Animal Fluency Performance in Persons With Aphasia Ewha Authors: 성지은 Abstract: Purpose: The current study examined the impact of cross-linguistic and cultural differences on an animal fluency task between Korean- and English-speaking persons with aphasia (PWA) and neurologically intact older adults (OAs). Specifically, we investigated the influence of zodiac animals on word retrieval, given their cultural familiarity in East Asia, hypothesizing that Korean speakers have a higher likelihood of producing zodiac animals compared to English speakers. Method: Sixty-seven PWA (30 English-speaking, 37 Korean-speaking) and 30 OAs (15 per language group) completed an animal fluency task. Analyses focused on three approaches: total correct responses, culturally specific responses (zodiac animals and ratio of zodiac animals), and an item-level com-parison of language-general and language-specific items to identify animal items that could differentiate between the language groups. Results: Korean speakers, both with and without aphasia, produced a greater pro-portion of zodiac animals compared to English speakers. Conversely, English speakers demonstrated greater semantic diversity in animal responses than Korean speakers. Conclusions: Both PWA and OA groups demonstrated differential patterns in producing zodiac animals, depending on their language and the culture. These findings shed light on the importance of considering cultural and linguistic diver-sity during aphasia assessment of word retrieval difficulties.

2025-01-01T00:00:00Z