• 대한산업공학회지
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• 제30권1호
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• pp.27-35
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• 2004

A study was conducted to investigate an optimal vibration frequency for mobile phones with just noticeable difference(JND). The just noticeable difference, Weber's law, is the minimum amount by which stimulus intensity must be changed in order to produce a noticeable variation in sensory experience. In order to find the optimal vibration frequency, sixteen frequencies ranged from 24Hz to 603Hz were selected. Subjects then wereasked to differentiate a pair of vibration frequencies. For the analysis, the psychometric function to determine the optimal vibration frequency and the logistic regression to validate the determined frequency were used. The results show that the 2nd order polynomial equations were best fitted for the JND psychometric function and the optimal mobile phone vibrations were determined at 140Hz, 151 Hz, and 160Hz. With the ogive-shaped psychometric function developed by the logistic regression, the results of this study was validated that the determined vibration frequencies (140Hz, 151 Hz, and 160Hz) were optimal mobile phone vibration frequencies.

• 대한간호학회지
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• 제37권3호
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• pp.324-333
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• 2007

Purpose: The purpose of this study was to develop and evaluate a quality of life scale for Korean patients with cancer (C-QOL). Methods: The C-QOL was developed and validated as follows, item generation, pilot study, and psychometric tests. A total of 337 patients diagnosed with stomach, liver, lung, colon, breast, or cervix cancer were recruited. The patients were asked to complete the preliminary questionnaire comprising the content-validated items, the SF-36, and the ECOG performance status. The obtained data was analyzed using descriptive statistics, factor analysis, multidimensional scaling (MDS), multitrait/multi-item matrix, ANOVA, t-test, and Cronbach's alpha. Results: Preliminarily twenty-six items were generated through content validity and a pilot study. Factor analysis and MDS extracted a total of 21 items with a 5-point Likert-type scale (C-QOL). The C-QOL included five subscales: physical status (6 items), emotional status (6 items), social function (3 items), concern status (2 items), and coping function (4 items). The C-QOL established content validity, construct validity, item convergent and discriminant validity, known-groups validity, reliability, and sensitivity. Conclusion: The Newly developed C-QOL is an easily applicable instrument which established psychometric properties and reflected Korean culture. It is recommended for further study to examine the responsiveness of the C-QOL using a longitudinal research design.

• 한국음향학회지
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• 제28권6호
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• pp.534-541
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• 2009

아동을 위한 단어인지도 검사 (word recognition test, WRT)는 아동의 의사소통장애정도를 진단하고, 보청기 사용을 위한 처방을 하고, 청각재활과 언어치료의 계획을 수립하고, 병변부위를 판단하는데 유용하게 사용될 수 있다. 한국표준 학령전기용 단음절어표 (Korean standard monosyllabic word lists for preschoolers, KS-MWL-P)는 문헌에서 주어진 기준을 고려하여 개발되었다. 그러나 KS-MWL-P의 저자들은 어표의 개발과정 중 단지 8명만 참여하여 분석된 심리음향 기능곡선을 검증하기 위하여 더 많은 대상을 포함한 연구를 제안하였다. 그러므로 본 연구의 목적은 KS-MWL-P 어표의 제한성을 보완하기 위하여 심리음향기능분석으로 어표의 동질성을 연구하고자 한다. 정상청력을 가진 23명의 학령전기아동을 대상으로 100개의 KS-MWL-P단어가 그림과 함께 제시되었다. -10에서 40 dB dBIH.까지 여러 강도에서 각 단어의 인지도 검사를 계산하여 20%와 80% 정답률 기준의 선형기울기로 심리음향기능곡선을 수집하고 분석하였다. 연구결과 강도에 따라 정답률이 증가하는 S자형 심리음향기능곡선이 나타났고 각 단어와 표간 통계적 유의성은 나타나지 않았다. 표간 유사한 그래프 형태를 통해 우수한 동질성을 보여주었고 표 1,2,3,4의 평균기울기는 4.48, 3.86, 4.65, 4.50 이었으며 일원 분산분석으로 분석할 때 표간 유의성이 없는 것 (p>0.05)으로 나타나서 표간 난이도의 동질성에 문제가 없는 것으로 확인되었다. 그리고 항목 번호의 순서에 따른 기울기의 P값도 표 1, 2, 3, 4에서 0.93, 0.59, 0.91, 0.70으로 모두 유의하지 않아 모든 표에서 $1{\sim}10$, $1{\sim}20$, $1{\sim}25$의 항목간 차이는 없는 것으로 나타났다. 그러나 KS-MWL-P는 낮은 번호의 항목은 더 어린 연령을 위하여 쉬운 단어로 배치하고자 하였으나 본 연구결과는 그렇지 못한 것으로 나타났다. 이러한 점을 고려할 때 어린 연령대를 위한 쉬운 단어가 낮은 항목에 배치되도록 항목의 배치를 재조정하여야 할 것으로 사료된다. 이러한 점을 제외하면 결론적으로 KS-MWL-P는 학령전기를 위한 임상과 재활의 평가 및 훈련도구로 유용한 것으로 입증되었다.

• Asian Pacific Journal of Cancer Prevention
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• 제15권3호
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• pp.1435-1440
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• 2014

Background: It has been found that support given to women with breast cancer has a positive effect upon their reactions to the illness and may even prolong their survival. Perceived support needs assessment in breast cancer women could be considered as a necessary part of nursing function. Aim: The purpose of this study was to translate and culturally adapt the self-assessed support needs (SASN) questionnaire into Persian language and to investigate its psychometric properties. Materials and Methods: After forward-backward translation of the questionnaire and making appropriate changes, we selected 160 women with breast cancer as our study sample. The psychometric properties of the SASN, including its internal consistency, test retest reliability, and construct validity were evaluated through the known-groups technique. Results: The calculated Kaiser Meyer Olkin was 0.756, indicating that the sample was sufficiently large to perform a satisfactory factor analysis. The six factors all together explained 50.7% of the variance; the first factor (diagnosing) explaining the biggest part of variance (10.9). Internal consistency reliability was 0.83 for the whole scale and the stability of test was 0.78. For the first factor, Cronbach's alpha was 0.90 and factor loadings of scale's items were found to deal with diagnosis subscale. The domains described patients' diagnosis, treatment, support, femininity and body image, family and friends and information. Conclusions: The reliability and validity of the adapted version of the SASN was shown to be satisfactory. Thus, it can be used to investigate self-assessed support needs of Iranian women suffering from breast cancer since the SASN is a multi-domain scale.

• International Journal of Computer Science & Network Security
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• 제22권5호
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• pp.49-54
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• 2022

The objective of this study was to examine the function of the items on the Arabic version of the Social Networking Time Use Scale (SONTUS) using Differential Item Functioning (DIF) across groups of university students in SA (i.e., males and females at UQU). The findings of this study indicated that some of the items in the Arabic version of the SONTUS functioned differently across male and female students in SA. University faculty and administrators in Saudi Arabia as well as in the Arabic world can benefit from understanding students use of SNS.

• 한국전문물리치료학회지
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• 제17권3호
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• pp.40-47
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• 2010

The purposes of this study were to compare the reliability and validity of an 88-item version of the Gross Motor Function Measure (GMFM-88) and a 66-item version of GMFM (GMFM-66) in children with cerebral palsy (CP). The GMFM was completed in 154 children with CP (age range = 6~12). The internal consistency of the GMFM was calculated by Cronbach's ${\alpha}$ for judging reliability. The reliability of GMFM-88 and GMFM-66 were both above .99. The validity of measurement obtained by the GMFM was assessed by examining the unidimensionality of items and by comparing Gross Motor Function Classification System (GMFCS) levels with tests of the GMFM. Both the GMFM-88 and GMFM-66 were satisfied with unidimensionality. Discriminant validity was demonstrated on significant decreases in scores with increasing GMFCS levels in both measurements. However, GMFM-66 was a more sensitive discriminant in GMFCS level 1 and level 2 and in level 2 and level 4. This study reported a comparison of the reliability and validity of GMFM-88 and GMFM-66. The results of this study have implications for the information on the psychometric properties of two versions of GMFCS. This information will be useful for the selection of tools in clinics.

• Perspectives in Nursing Science
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• 제13권2호
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• pp.96-109
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• 2016

Purpose: The purposes of this study were to develop a nursing assessment tool for senior center nurses, and to test its feasibility and content validity. Methods: The study utilized a psychometric test design. Preliminary items were developed based on geriatric health needs and Gordon's 11 domains of functioning health. Initially, the tool was evaluated for content validity and feasibility. Then, it was administered among 195 older adults in a senior center by a gerontological nurse practitioner. Data were analyzed to describe the nursing problems of the senior center older adults. Results: The final version of the nursing assessment tool consisted of 27 items. The internal consistency, measured with the Cronbach's ${\alpha}$, was .74. The result of the assessment showed that senior center older adults had high nursing needs in the area of management of chronic diseases (hypertension, diabetes, and lipids), dental care, community relations, safety, elder abuse, health behaviors (such as drinking), mental health (depression, suicide, and cognitive function), and health consultations. Conclusion: The new tool was feasible for use with senior center participants, and it was evaluated as having high content validity by senior center nurses.

• 재활치료과학
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• 제8권3호
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• pp.43-55
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• 2019

목적: 본 연구의 목적은 수행기반 인지기능 평가를 위한 예비연구로써 노인의 인지기능 저하 선별하기 위해 사용되는 수행기반 인지기능 평가도구를 분석하여 평가 문항을 구성하고 정상 노인을 대상으로 검사를 시행하여 타당도를 검증하는 것이다. 연구방법: 수행기반 인지기능 평가항목을 선정한 후, 만 65세 이상 정상 노인 9명을 대상으로 평가를 시행하였다. 평가도구의 신뢰도를 검증하기 위해 수집된 자료를 대상으로 내적 일관성을 분석하였으며, 공인 타당도를 검증하기 위해 기존 수행기반 인지기능 평가와 MMSE-K와의 상관관계를 분석하였다. 결과: Performance-Based Cognitive Function Test(PCFT)의 내적일치도 Cronbach's ${\alpha}$ 계수는 운동과제 .871 인지과제 .959 높은 신뢰도를 나타냈다. 공인타당도는 운동-인지 이중과제 평가를 이용하여 PCFT의 항목별 상관관계는 .755~.964으로 산출되었으며 통계적으로 유의하였다(p<.05). 또한 인지평가도구인 MMSE와의 상관관계는 .849~.943(p<0.01)로 나타나 높은 타당도를 보였다. 결론: 본 연구를 통해 수행기반 인지기능 평가의 신뢰도 및 타당도를 검증하였다. 추후 연구에서는 최종적으로 수정 보완된 인지기능저하 노인을 선별을 위한 수행기반 인지기능 평가도구를 대상으로 기타 신뢰도 및 타당도를 검증하여야 할 것으로 사료된다.

• 한국전문물리치료학회지
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• 제15권2호
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• pp.44-53
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• 2008

The purpose of this preliminary study was to develop a measurement for assessing risk factors for falling in community-dwelling elderly persons. Rasch analysis and principal component analysis were performed to examine whether items on the Activities-Specific Balance Confidence (ABC), assessing self-efficacy, and items on the Berg Balance Scale (BBS), assessing balance function, contribute jointly to a unidimensional construct in the elderly. A total of 35 elderly persons (4 men, 31 women) participated. In this study, each item of ABC (16 items) and BBS (14 items) was scored on a 5-point ordinal rating scale from 0 to 4. The initial Rasch and principal component analysis indicated that 3 of the ABC items and 2 of the BBS items were misfit for this study. These 5 items were excluded from further study. After combining ABC and BBS, Rasch and principal component analyses were examined and finally 23 items selected; 12 items from ABC, 11 items from BBS. The 23 combined ABC-BBC items were arranged in order of difficulty. The hardest item was 'walk outside on icy sidewalks' and the easiest item was 'pivot transfer'. Although structural calibration of each 5 rating scale categories was not ordered, the other three essential criteria of Linacre's optimal rating scale were satisfied. Overall, the ABC-BBS showed sound item psychometric properties. Each of the 5 rating scale categories appeared to distinctly identify subjects at different ability levels. The findings of this study support that the new ABC-BBS scale measure balance function and self-efficacy. It will be a clinically useful assessment of risk factors for falling in the elderly. However, the number of subjects was too small to generalize our results. Further study is needed to develop a new assessment considering more risk factors of falling in elderly.

• 중환자간호학회지
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• 제11권1호
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• pp.46-66
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• 2018

Purpose : The purpose of this study was to systematically review the instruments utilized to assess physical impairment in post-intensive care syndrome (PICS) of intensive care unit (ICU) survivors. Method : Online databases searched were MEDLINE, Cochrane, CINAHL, and Embase. Studies that met the following criteria were included: 1) the study population exclusively had experience with ICU admission; 2) the study assessed pulmonary, neuromuscular, and physical functions; and 3) the study was published in English language journals after 2007. Results : A total of 56 instruments (2 pulmonary, 25 neuromuscular, 29 physical function) from 94 studies were reviewed. They were classified into self-report, observation, and measurement according to the type of assessment. No instrument measured all 3 areas of physical impairment. Five instruments were originally developed for the ICU patients. The most frequently applied instruments were the Medical Research Council and the 36-item Short Form Survey (physical component summary), which were used in 23 studies each. Only 13.8% of reviewed studies reported the reliability or validity of the instruments. Conclusion : Our results suggest that the appropriateness of instruments assessing physical impairment in PICS cannot be guaranteed. Despite the multidimensional concept of physical disabilities, most studies measured only one area, and studies that reported psychometric properties were limited. Accordingly, we propose to develop a unique and multifaceted instrument for ICU survivors.