評定量表相關係數校正影響因素之模擬研究
Date Issued
2004
Date
2004
Author(s)
DOI
922413H002018
Abstract
本研究擬以模擬研究的方法探討信度類別與量尺特性對評定量表相關係數校正的影響。模擬研究中擬操弄量表點數、量表內題目間的共變數、量表題數、受試者判斷的正確度（即個別題目之信度），跨量表題目真分數間的共變數，與點量表分配六個因素，比較以內部一致性信度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校正之相關係數之差異。結果發現以內部一致性信度α 校正之相關係數在題目同質性低時易高於理論值，其他兩類信度校正之相關係數的偏誤則較小。
Subjects
The Monte Carlo experiment examined
the effects of the type of reliability and the
properties of Likert-type rating scales on
correlations corrected for attenuation. The
independent variables manipulated included
number of response categories, inter-item
covariance, number of items, respondents’
judgment accuracy (or reliability of
individual item), correlations between true
score items across measures, and distribution
of scores of the rating scales. The quality of
the Pearson product-moment correlations
corrected for attenuation by the internal
consistency reliability α, the test-retest
reliability, and the squared correlation
between true scores and observed scores
were compared. The correlation corrected by
internal consistency reliability α was found
to be higher than the population value when
items were less homogeneous. The
correlations corrected by the other two types
of reliability, in general, yielded less biased
results.
the effects of the type of reliability and the
properties of Likert-type rating scales on
correlations corrected for attenuation. The
independent variables manipulated included
number of response categories, inter-item
covariance, number of items, respondents’
judgment accuracy (or reliability of
individual item), correlations between true
score items across measures, and distribution
of scores of the rating scales. The quality of
the Pearson product-moment correlations
corrected for attenuation by the internal
consistency reliability α, the test-retest
reliability, and the squared correlation
between true scores and observed scores
were compared. The correlation corrected by
internal consistency reliability α was found
to be higher than the population value when
items were less homogeneous. The
correlations corrected by the other two types
of reliability, in general, yielded less biased
results.
Likert-type scales
internal consistency reliability
test-retest reliability
criterion-related validity
correction for
attenuation
attenuation
Publisher
臺北市：國立臺灣大學心理學系暨研究所
Type
report
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