That reliability be examined “in an appropriate manner” is key, because KR-20s and inter-rater correlations characterize the credibility of certain kinds of data we employ for certain kinds of inferences in educational assessment, but not others. I applaud Professor Moss’s use of a hermeneutic...
Psychological research involving scale construction has been hindered considerably by a wide-spread lack of understanding of coefficient alpha and reliability theory in general. A discussion of the assumptions and meaning of coefficient alpha is presented. This discussion is followed by a demonstration of...
摘要: Summary A computer simulation was designed to investigate the impact on exploratory factor analysis (EFA) of a Pearson matrix and the coefficient alpha estimate of scale reliability when some respondents are not able to follow the Likert-type rating scale (eg...
MAIN OUTCOME MEASURES: The intraclass correlation coefficient (ICC) was used to rate the reliability of the tool. brRESULTS: Average overall scores for the five sites were 40%, 79%, 83%, 88%, and 89%. All three observers rated the same two sites in fourth and fifth place and gave the...
What is the best way to remember the difference between variance and reliability in the field of...Question:What is the best way to remember the difference between variance and reliability in the field of psychological counseling?Psychological Counseling:...
A reliability coefficient is only one criterion of a test. It measures the amount of agreement one would expect between an individual's score on one form of a test and his score on any other comparable form of the same test; but is there anything to show that the so-called reading ...
By introducing the regularization term, ridge regression improves the stability and reliability of the regression model. It reduces the variance of the coefficient estimates, which can help to mitigate the problem of overfitting in cases where there are too many predictors compared to the number of ...
A correlation coefficient is the statistical measure that will tell us whether there is a relationship between our two variables of interest, and if there is one, how strong that relationship is. The value of the correlation coefficient, ϝ (rho), ranges from -1 to +1. The closer to -...
Reliability was tested using internal consistency and a reliability coefficient (Cronbach alpha) of 0.896 was found for the 30 items of the questionnaire. Total knowledge score was categorized into three levels: poor (< 50%), average (50–70%), and high knowledge (> 70%) [19]. The ...
In statistics, a confidence interval (CI) is a type of interval estimate of a population parameter and is used to indicate the reliability of an estimate. It is an observed interval (i.e. it is calculated from the observations), in principle different from sample to sample, that frequently...