Yae Rin Yoo, Yoonseob Lim, Eun Jin Paek, Jee Eun Sung
{"title":"基于层次聚类分析的动作言语流畅性任务中转换和聚类多样性的年龄相关变化。","authors":"Yae Rin Yoo, Yoonseob Lim, Eun Jin Paek, Jee Eun Sung","doi":"10.1044/2025_AJSLP-24-00399","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>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.</p><p><strong>Method: </strong>Sixty-two native Korean speakers participated in the study, with 31 young adults (<i>M</i><sub>age</sub> = 27.39) and 31 older adults (<i>M</i><sub>age</sub> = 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.</p><p><strong>Results: </strong>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.</p><p><strong>Conclusions: </strong>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.</p><p><strong>Supplemental material: </strong>https://doi.org/10.23641/asha.29396300.</p>","PeriodicalId":49240,"journal":{"name":"American Journal of Speech-Language Pathology","volume":" ","pages":"1-14"},"PeriodicalIF":2.5000,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Aging-Related Changes in Switching and Cluster Diversity in the Action Verbal Fluency Task Using Hierarchical Clustering Analysis.\",\"authors\":\"Yae Rin Yoo, Yoonseob Lim, Eun Jin Paek, Jee Eun Sung\",\"doi\":\"10.1044/2025_AJSLP-24-00399\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Purpose: </strong>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.</p><p><strong>Method: </strong>Sixty-two native Korean speakers participated in the study, with 31 young adults (<i>M</i><sub>age</sub> = 27.39) and 31 older adults (<i>M</i><sub>age</sub> = 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.</p><p><strong>Results: </strong>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.</p><p><strong>Conclusions: </strong>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.</p><p><strong>Supplemental material: </strong>https://doi.org/10.23641/asha.29396300.</p>\",\"PeriodicalId\":49240,\"journal\":{\"name\":\"American Journal of Speech-Language Pathology\",\"volume\":\" \",\"pages\":\"1-14\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2025-07-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"American Journal of Speech-Language Pathology\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1044/2025_AJSLP-24-00399\",\"RegionNum\":3,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"American Journal of Speech-Language Pathology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1044/2025_AJSLP-24-00399","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY","Score":null,"Total":0}
Aging-Related Changes in Switching and Cluster Diversity in the Action Verbal Fluency Task Using Hierarchical Clustering Analysis.
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 (Mage = 27.39) and 31 older adults (Mage = 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.
期刊介绍：
Mission: AJSLP publishes peer-reviewed research and other scholarly articles on all aspects of clinical practice in speech-language pathology. The journal is an international outlet for clinical research pertaining to screening, detection, diagnosis, management, and outcomes of communication and swallowing disorders across the lifespan as well as the etiologies and characteristics of these disorders. Because of its clinical orientation, the journal disseminates research findings applicable to diverse aspects of clinical practice in speech-language pathology. AJSLP seeks to advance evidence-based practice by disseminating the results of new studies as well as providing a forum for critical reviews and meta-analyses of previously published work.
Scope: The broad field of speech-language pathology, including aphasia; apraxia of speech and childhood apraxia of speech; aural rehabilitation; augmentative and alternative communication; cognitive impairment; craniofacial disorders; dysarthria; fluency disorders; language disorders in children; speech sound disorders; swallowing, dysphagia, and feeding disorders; and voice disorders.
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