Comparison of CTT and IRT methods Clause Samples

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Comparison of CTT and IRT methods. ▇▇▇▇▇▇▇▇▇ (1996) compared CTT and IRT methods with reference to six measurement rules. ▇▇▇▇▇ (2000) has also made comments comparing CTT and IRT. The comparisons made by ▇▇▇▇▇▇▇▇▇ and the comments made on these by ▇▇▇▇▇ have been combined into the following six points. 1. Standard error of measurement. In CTT, the standard error of measurement allows confidence limits to be set, for individual scores, which apply to the whole population. In ▇▇▇▇▇ measurement however, estimates can be calculated for each level of the latent trait, which are population free. The implication of this is therefore, that although the ▇▇▇▇▇ method has an advantage in precision, it becomes most relevant in practice at the extremes of the scale.
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