Hxiangxi H. Kim
Yonsei University · Medicine
About the Lab
Professor Hxiangxi H. Kim's research lab specializes in clinical neuropsychology and neurogenic communication disorders, with a focus on developing and validating culturally adapted assessment tools for Korean-speaking populations. The lab investigates language and cognitive impairments in neurological conditions such as aphasia, mild cognitive impairment, and stroke-related deficits, emphasizing the development of reliable, norm-referenced instruments like the Korean versions of the Boston Naming Test and Western Aphasia Battery. Research also extends to swallowing disorders (dysphagia) in older adults and the potential of mobile health (mHealth) interventions to improve rehabilitation outcomes through accessible, technology-based training. The lab integrates quantitative and qualitative methods to enhance diagnostic accuracy and patient-centered care in clinical practice.
Research Overview
Research Output Trend
Figures are computed from collected data and may differ slightly.
Selected Papers
15The purpose of this study is to introduce the Korean version of the Boston Naming Test (K-BNT) and to present the normative data. The K-BNT contains the same number of test items and uses the identical general administration method as the original Boston Naming Test (BNT). However, most of the items had to be altered due to the linguistic and cultural differences between Korean and English speakers. We administered 60 line-drawing pictures to six hundred normal participants in eight age groups (
The study aimed to describe the properties of the Korean version of the Western Aphasia Battery (hereinafter K-WAB) and to present the normative data of normal individuals and patients. The K-WAB contains the same test contents and structure as the original WAB and the general test administration method was maintained. We administered the K-WAB to 224 normal adults in seven age groups (1524, 2534, 3544, 4554, 5564, 6574, and 75 years or older), in five educational levels (0, 16, 79, 1012, and 13
Medullary infarctions often cause aspiration, but the occurrence may depend on the levels along the neuraxis and intralevel lesion loci. When different lesion levels and loci and their related clinical findings are considered as possible variables, aspiration becomes predictable. The outcome data prove that systematic control of evaluation time of swallowing was critical as we engaged in this study, since many aspirators with pure medullary infarctions resolve their swallowing difficulties rathe
Although subtle discourse declines in people with mild cognitive impairment (MCI) have been reported, heterogeneous measures and tasks among the MCI discourse studies have yielded widely varying outcomes. The present study aimed to first, identify discourse measures that aid the differentiation among people with amnestic MCI (aMCI), people with non-amnestic MCI (naMCI), and cognitively healthy control (HC) participants, and second, delineate the cognitive functions related to such discourse meas
Administration time of 1 min for semantic verbal fluency measures can be overly long and therefore bothersome for aphasic patients because they can often retrieve only a few items after a certain period of time. The purpose of this study was to determine whether an administration time of 30 s would be more efficient in differentiating among aphasics, nonaphasic stroke patients, and normal controls. The subjects were 53 stroke patients and 28 normal controls. They had to generate as many animal n
BACKGROUND: Swallowing difficulties (ie, dysphagia) are common among older adults, with a 13% to 54% prevalence. Adequate interventions to improve the swallowing function of older adults would reduce morbidity and enhance health-related quality of life outcomes. Mobile health (mHealth) apps may help alleviate dysphagia symptoms by providing programs that maximize the intensity and frequency of training without requiring high costs or regular clinic visits. OBJECTIVE: The aim of this pilot study
OBJECTIVE AND BACKGROUND: Along with auditory function, cognitive function contributes to speech perception in the presence of background noise. Older adults with cognitive impairment might, therefore, have more difficulty perceiving speech-in-noise than their peers who have normal cognitive function. We compared the effects of noise level and cognitive function on speech perception in patients with amnestic mild cognitive impairment (aMCI), cognitively normal older adults, and cognitively norma
이름대기 능력의 손상은 신경학적 질환을 지닌 환자뿐만 아니라, 정상적인 노화과정에 있는 노인에게서도 빈번하게 관찰된다. 이름대기 능력을 평가하기 위해 가장 널리 사용되고 있는 한국판 보스톤 이름대기 검사(Korean version-the Boston Naming Test, K-BNT)는 60문항으로 구성되어 있다. 일반노인들은 노화에 따른 주의력 감소로 인하여 검사 소요시간이 길면 검사에 대한 집중이 어려워지므로, 검사 결과에 대한 타당도 및 신뢰도를 확보하기 위해서는 문항축소가 바람직하다. 본 연구의 목적은 '문항반응이론(Item Response Theory)'을 적용하여, 60개 문항의 K-BNT를 일반노년층의 이름대기 능력을 가장 잘 평가할 수 있는 15개 문항의 검사(즉, K-BNT-15)를 개발하는 것이었다. 이를 위하여, 일반노인 175명을 대상으로 라쉬분석을 실시하여, 문항적합도, 성별 차이, 문항난이도 등을 평가하였다. K-BNT-15의 실시 결과, 일반 노년층은 10
These findings suggest that literacy in performance on cognitive and language tests is an important factor in neuropsychological evaluations for older adults.
BACKGROUND: Tongue pressure is an effective index of swallowing function, and it decreases with aging and disease progression. Previous research has shown beneficial effects of swallowing exercises combined with myofunctional tongue-strengthening therapy on tongue function. Tongue exercises delivered through mobile health (mHealth) technologies have the potential to advance health care in the digital age to be more efficient for people with limited resources, especially older adults. OBJECTIVE:
Most of the behavioural therapies improved swallowing function in PD. Treatments that enhanced airway function globally demonstrated positive effects on swallow function as did intensive, targeted swallowing treatment. However, the chin-down strategy did not show a significant effect on swallowing measured by flexible endoscopic evaluations of swallowing. EMST detraining effects implied a need to design maintenance training in PD. In the future, well-designed randomised controlled trials are nee
We evaluated the integrity of the white matter tract using diffusion-tensor magnetic resonance imaging in children with language impairments who exhibited a structurally normal brain on conventional magnetic resonance imaging, and compared it with age-matched normal children. After generating fractional anisotropy and color-coded vector maps, fractional anisotropy values of the major white matter tracts were measured in six locations and compared between the two groups. Compared with the normal
Language-specific writing errors by Korean stroke patients reflect the unique characteristics of Korean writing, which include the arrangement of strokes and graphemes within a square syllabic form by dimensional and spatial rules. These findings support the notion that the Korean writing system possesses a language-specific nature with both linguistic and visuospatial/constructive processes. Distinctive patterns of dysgraphia in the Korean language also suggest interactivity between linguistic
Research Areas
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