翁儷禎2006-07-252018-06-282006-07-252018-06-282001http://ntur.lib.ntu.edu.tw//handle/246246/9684本計畫以模擬研究的方法探討影響評定量表信度的因素。模擬研究中操弄量表點數、題目間的共變數、量表題數、受試者判斷的正確度（即個別題目之信度），與點量表題目得分分配五個變項，以探究此五因素對內部一致性信度α，再測信度，真分數與觀察分數相關的平方等三種信度係數的影響。結果發現各交互作用項的影響相當小，各因素的影響可以加成模式解釋。內部一致性信度主要受題間共變數與量表題數影響；再測信度主要受受試 者判斷的正確度影響，量表題數次之；真分數與觀察分數相關的平方主要受受試者判斷的正確度與量表題數影響，量尺點數與分配次之。此研究結果可作為評定量表設計之參考，以編製最能增進測量結果信度之量尺。The Monte Carlo method was proposed to examine the factors that influence the reliability of Likert-type rating scales. The independent variables manipulated included number of response categories, inter-item covariance, number of items, respondents’ judgment accuracy (or reliability of individual item), and item score distributions of the rating scales. Dependent variables included three estimates of test reliability: the internal consistency reliabilityα , the test-retest reliability, and the squared correlation between true scores and observed scores. The research is the first part of a two-year project. Results indicated that internal consistency reliabilityαwas mainly affected by inter-item covariance and number of items. Respondent judgment accuracy and number of items affected test-retest reliability. The squared correlation between true scores and observed scores was affected by judgment accuracy, number of items, number of response categories, and item score distributions of the rating scales. It is anticipated that the results of the simulation study will assist developers of Likert-type rating scales in choosing appropriate design to achieve optimal reliability for measurement in their research.application/pdf44037 bytesapplication/pdfzh-TW國立臺灣大學心理學系暨研究所評定量尺李克特式量尺量尺點數題目分配再測信度內部一致性信度rating scalesLikert-type scalesnumber of response categoriesitem distributionstest-retest reliabilityinternal consistency reliabilityreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/9684/1/892413H002048.pdf