• 한국전문물리치료학회지
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• 제22권3호
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• pp.61-70
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• 2015

To develop an effective and efficient measurement system for tracking changes of functional status across two measures, it is essential to integrate information and communicate scores across two measures. The lack of communication between two measures leads to score incompatibility. A potential solution would be the development of a crosswalk table between those measures. Prior to creating a crosswalk table, selecting common items between two measures is critical. By using the Oswestry low back pain disability questionnaire (Oswestry) and a short form measuring disability resulting from low back pain, item level statistics as well as differential item functioning (DIF) using the Rasch measurement were investigated. Eighty-two participants with known group validity were recruited. Based on the application of the Rasch measurement model, item difficulties across the two measures were logically and hierarchically ordered. Ceiling effects for both measures were detected, which were not be able to be effectively measured with the two measures. The DIF analysis across the two measures confirmed that five paired items were found to have DIF and five common items were selected for common items. Although five paired items function differently across the Oswestry and the short form, all items of both measures were well targeted study participants. The common items selected by the Rasch measurement model may be effective when creating a crosswalk table between the Oswestry and the short form.

• 한국초등과학교육학회지:초등과학교육
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• 제32권2호
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• pp.139-158
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• 2013

This study investigated elementary students' (grade 4~6) learning progressions for water cycling drawn from iterative assessments using ordered multiple-choice (OMC) items. An assessment system, which consisted of construct map, item design, outcome space, and measurement model, was employed in this study to examine children's learning progressions. At the first stage of the assessment system, a construct map was designed on which children's conceptual understandings from naive to most sophisticated were represented. At the item design stage, 8 OMC items were drawn from the construct map. Each item option of the OMC items was scored from 0 to 3 according to its level of understanding at the stage of outcome space. As a measurement model, Rasch model, a branch of item response theory, was applied to interpreting the outcomes of the OMC items. This cycle of assessment system was furtherly implemented iteratively in order to elaborate on the first version of water cycling learning progression. In conclusion, children's understanding of water cycling could be described in two aspects: water distribution and water movement. We identified children's conjectural developmental pathways about water cycling existed from superficial and naive accounts to more complex and abstract accounts.

• Research in Vestibular Science
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• 제17권4호
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• pp.152-159
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• 2018

Objectives: The Korean Dizziness Handicap Inventory (KDHI), which includes 25 patient-reported items, has been used to assess self-reported dizziness in Korean patients with Parkinson disease (PD). Nevertheless, few studies have examined the KDHI based on item-response theory within this population. The aim of our study was to address the feasibility and clinimetric properties of the KDHI instrument using polytomous Rasch measurement analysis. Methods: The unidimensionality, scale targeting, separation reliability, item difficulty (severity), and response category utility of the KDHI were statistically assessed based on the Andrich rating scale model. The utilities of the orderedresponse categories of the 3-point Likert scale were analyzed with reference to the probability curves of the response categories. The separation reliability of the KDHI was assessed based on person separation reliability (PSR), which is used to measure the capacity to discriminate among groups of patients with different levels of balance deficits. Results: Principal component analyses of residuals revealed that the KDHI had unidimensionality. The KHDI had satisfactory PSR and there were no disordered thresholds in the 3-point rating scale. However, the KDHI showed several issues for inappropriate scale targeting and misfit items (items 1 and 2) for Rasch model. Conclusions: The KDHI provide unidimensional measures of imbalance symptoms in patients with PD with adequate separation reliability. There was no statistical evidence of disorder in polytomous rating scales. The Rasch analysis results suggest that the KDHI is a reliable scale for measuring the imbalance symptoms in PD patients, and identified parts for possible amendments in order to further improve the linear metric scale.

• 한국통계학회:학술대회논문집
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• 한국통계학회 2003년도 추계 학술발표회 논문집
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• pp.149-154
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• 2003

문항반응이론(item response theory, IRT)에서는 문항이 가지고 있는 특성을 기초로 피험 자의 능력을 추정 하고 동시 에 각 문항별 문항특성곡선(item characteristics curve; ICC)을 이용하여 문항모수를 추정하게 된다. 이러한 추정알고리즘은 이미 외국에서는 상용화되 어 활용되고 있는바, 국내 에서 개 발한 Any Assess의 활용 가능성을 모의 실험을 통하여 그 결과의 신뢰성을 검증해 보았다.

• 한국문헌정보학회지
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• 제47권3호
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• pp.296-320
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• 2013

이 연구의 목적은 대학 도서관의 브랜드 이미지 측정을 위한 연구모형을 제시하는 것이다. 도서관 브랜드 이미지의 구성요소를 추출하기 위하여 선행연구를 조사하여 도서관 브랜드 이미지의 구성차원을 기능적 이미지, 경험적 이미지, 상징적 이미지의 3개의 차원으로 나누고, 이를 다시 총 11개의 하부차원과 45개의 항목으로 구분하였다. 구분된 항목을 대상으로 IRT(item response test)와 군집분석을 실시하였으며, 그 결과 총 3개의 차원과 9개의 하부차원 그리고 27개의 항목이 도서관의 브랜드 이미지 영향요소로서 유효한 것으로 나타났다.

• 한국전문물리치료학회지
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• 제14권1호
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• pp.37-45
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• 2007

This study was designed to examine, applying Rasch analysis based on item response theory, the questionnaires of the Activities-Specific Balance Confidence (ABC) scale for the elderly. The subjects were 99 institutional older adults and clients of social welfare facilities. The subjects (17 men, 72 women) ranged in age from 65 to 94 years (mean age 76.5 yrs). The Winsteps software was used to assess whether the ABC scale fits the Rasch model, to estimate the score and to refine the rating scale. The results are as follows. Twenty-two subjects were excluded as misfit persons. Four items were found to be misfits and the order of difficulty of the remaining 12 items was rearranged. Their balance confidence is indicated by -.64~1.12 logit, and the transformation formula is score=[(logit score+2.76)/(2.76+3.48)]${\times}$100. The most difficult item was "Walk outside in icy sidewalks" and the easiest item was "Walk around house." In conclusion, the ABC scale for the elderly has been proven reliable and valid. Therefore, it is expected to be used as an effective examination tool for treatment planning and screening for older adults.

• 한국전문물리치료학회지
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• 제21권4호
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• pp.40-48
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• 2014

Differential item functioning (DIF) based on Rasch model can be used to examine whether the items function similarly across different groups and identify items that appear to be too easy or difficult after controlling for the ability levels of the compared groups. The Oswestry low back pain disability (Oswestry) has traditionally been proved as an effective instrument measuring disability resulting from low back pain (LBP). In this study, DIF method was used to explore whether items on the Oswestry perform similarly across two different groups (participants with LBP and no LBP). A series of Rasch analyses on the 10 items of the Oswestry were performed using Winsteps$^{(R)}$ software. Forty-two participants with back pain were recruited from 3 rehabilitation hospitals in Gainesville, Florida. Another 42 participants with no LBP were recruited from several public places in the rehabilitation hospitals. Based on the DIF analysis across the two groups, several items were found to have an uniform DIF. Participants with no LBP had more difficulty on lifting and personal care items and participants with LBP had more difficulty on sleeping and social life items. For non-LBP group, a high ceiling effects (83% of participants with non-LBP) was detected, which was not be able to be effectively measured with the Oswestry items. Although 4 items of the Oswestry function differently across the two groups, all items of the Oswestry were well targeted the LBP group.

• 한국콘텐츠학회논문지
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• 제22권9호
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• pp.439-450
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• 2022

연구 목적: 가임 여성의 조기진통에 대한 예방적 자가관리 지식(PSMK-PL) 측정도구를 개발하는 것이다. 연구 방법: 연구절차는 1단계 개념 정의(문헌 고찰, 질적 면담), 2단계 문항개발(문항작성, 전문가 내용타당도, 가임 여성의 인지적 면담), 3단계 내용타당도와 신뢰도 검정(250명의 온라인 설문조사 자료 분석)이었다. 문항반응이론을 적용한 내용타당도는 2-모수 로지스틱 모형을 사용하였다. 내적일관성 신뢰도는 Cronbach's α (95% CI)를 확인하였다. 연구 결과: 전문가 내용타당도 검정과 인지적 인터뷰를 통해 수정한 예비 문항 30개 중 적합도, 양류상관계수, 중요도를 고려해 6개를 삭제하였다. 최종 24문항, 하부 범주는 조기진통의 위험요인(10개), 예방적 관리(8개), 조기진통의 증상과 증상관리(6개)였다. 최종 문항 난이도(-2.18~0.90), 변별도(0.80~2.90), 내적합도(0.78~1.14), 양류상관계수(0.42~0.68)는 모두 수용할 만한 수준이었다. Cronbach's α (95% CI)는 .89(.87~.91)였다. 결론: PSMK-PL 측정도구는 가임 여성의 조기진통에 대한 예방적 자가관리지식을 측정할 수 있는 검정된 척도이다.

• 한국영어학회지:영어학
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• 제3권4호
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• pp.571-588
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• 2003

The purpose of this study is to investigate into the various ways that the computer technology is used for language testing. Three uses of computer technology are mentioned: 1) computer-adaptive language testing and computer-based language testing, 2) the scoring of performance-based language assessment, and 3) the development and use of psychometric tools for analyzing the scoring results. Although the various uses of computer technology could provide expanded possibilities for language testing development, the developers should be reminded that they are currently subject to indepth research which could support their validity. In this regard, the advantages and limitations of some uses of computer technology for language testing are discussed.

• 여성건강간호학회지
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• 제27권2호
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• pp.153-165
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• 2021

Purpose: This study aimed to develop the following scales on women's environmental health and to examine their validity and reliability: severity, susceptibility, response efficacy, self-efficacy, benefit, barrier, personal health behavior, and community health behavior scales. Methods: The item pool was generated based on related scales, a wide literature review, and indepth interviews on women's environmental health according to the revised Rogers' protection motivation theory model. Content validity was verified by three nursing professionals. Exploratory factor analysis, convergent validity, and internal consistency reliability were examined. Results: The scales included 10 items on severity, 11 on susceptibility, 10 on response efficacy, 14 on self-efficacy, 8 on benefits, 10 on barriers, 17 on personal health behavior, and 16 on community health behavior. Convergent validity with the environmental behavior scale for female adolescents was supported. The Cronbach's α values for internal consistency were good for all scales: severity, . 84; susceptibility, .92; response efficacy, .88; self-efficacy, .90; benefits, .91; barriers, .85; personal health behavior, .90; and community health behavior, .91. Conclusion: The evaluation of the psychometric properties shows that these scales are valid and reliable measures of women's environmental health awareness and behaviors. These scales may be helpful for assessing women's environmental health behaviors, thereby contributing to efforts to promote environmental health.