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It is the proportion of test takers who answered correctly out of the total number of test takers. For example, an item difficulty score of 89/100 means that out of 100 people, 89 answered correctly.
- What is classical test theory used for?
- What is classical test theory and item response?
- What is classical test theory in psychology?
- What is classical test theory equation?
What is classical test theory used for?
Classical Test Theory (CTT) has been developed to quantify measurement error and to solve related problems such as correcting observed dependencies between variables (e.g., correlations) for the attenuation due to measurement errors. Basic concepts of CTT are true score and measurement error variables.
What is classical test theory and item response?
Classical Test Theory and Item Response Theory (CTT & IRT) are the two primary psychometric paradigms. That is, they are mathematical approaches to how tests are analyzed and scored. They differ quite substantially in substance and complexity, even though they both nominally do the same thing.
What is classical test theory in psychology?
Classical test theory is the body of concepts and methods that have formed the basis for psychological assessment. Classical test theory posits that observed scores are the additive function of true scores and error terms. True scores are the ideal value of a construct in a particular person or situation.
What is classical test theory equation?
The central model of the classical test theory is that observed test scores (TO) are composed of a true score (T) and an error score (E) where the true and the error scores are independent. The variables are established by Spearman (1904) and Novick (1966) and best illustrated in the formula: TO = T + E.
