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題 名 | 電腦化適性測驗:評估皮膚癌風險=Computer-Adaptive Tests (CAT): A Way to Investigate the Skin Cancer Risk |
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作 者 | 錢才瑋; 林為森; 賴豐傑; | 書刊名 | Medical Journal of South Taiwan |
卷 期 | 11:2 2015.12[民104.12] |
頁 次 | 頁55-63 |
分類號 | 415.78 |
關鍵詞 | 電腦化適性測驗; 皮膚癌的風險評估; 非電腦化適性測驗; 羅序分析; 部份計分模式; Computer adaptive testing; Skin cancer risk scale; Non adaptive test; Rasch analysis; Partial credit model; |
語 文 | 中文(Chinese) |
中文摘要 | 目的:很少研究利用于機上網進行電腦他適性測驗(CAT),本研究驗證CAT較傳統非電腦他適性測驗(NAT)來得更有效率且較小的測量誤差。方法:研究資料(29,314受試者)來自於澳洲國家研究院的次級資料,除利用Rasch PCM估計題目的閾階參數外,也決定其皮膚癌風險的決斷點。決斷點條供病人C AT時決定是否赴醫院再做皮膚癌檢查的依據參考。受試者能力取白於平均值為0,標準差為1的常態分佈資料,建立30題的CAT題庫資料,模擬1,000人於其3種Rasch家族模式(即二元計分模式、評定量尺計分模式及PCM)的3種不同題目長度(即10、20及30題)的CAT及NAT情境下作答。比較CAT與NAT間的效率、準確度及測量誤差。結果:研究發現CAT沒有降低其測量準確度,與作答全部30題的NAT有著相等的準確度。CAT的效率顯示題目長度可以減少112以上(Rasch家族3個模式減少作答題數的工作負荷分別為48.20%、66.70% 、及66.20%),受試者的測量誤差則隨題數的增加而減小。結論:本研究建立一具決斷點大於0.88個logits分數的手機上網CAT皮膚癌的風險評估,掃描QR-code即可進行評量。 |
英文摘要 | Objective: Few studies are currently available that, using a mobile phone, have applied the Rasch Partial Credit Model (PCM) to its computer adaptive testing (CAT) in practice. We developed a mobile CAT survey procedure to practically demonstrate the newly developed CAT application in action. Methods: Data from 29,314 cases in Australia's The QSkin Sun and Health Study (2011) were used to calibrate item difficulty parameters, including their step difficulties, and then to determine the cutoff point of high skin cancer risk. The latter was recommended to patients visiting physicians for reexamining cancer skin risk in a hospital. We created a skin-cancer-risk bank of 30 items. One thousand respondents following a log normal distribution (log mean: 0; log SD: 1) were simulated using 3 Rasch models with 3 respective fixed-item scenarios. We calculated the comparative efficiency and precision of the CAT and a Non Adaptive Test (NAT) by their item length and by testing the statistical significance (p < 0.05) of their difference using independent t tests. Results: We found that the CAT had a smaller standard error (SE) than did the NAT without compromising test precision, and that the CAT was substantially more efficient: it reduced response burdens 48.20% for the dichotomous, 66.70% for the rating scale model (RSM), and 66.20% for the PCM models. Conclusions: A mobile CAT with a cutoff point of 0.88 was developed to help patients examine their cancer risk at an earlier stage. |
本系統中英文摘要資訊取自各篇刊載內容。