However, measuring blood pressure and processing speed might be less reliable. For example, measurements of height and weight are often extremely reliable. Some measures are more reliable than others, because the tools we use to measure are better, and there is more consistency in what we are measuring. A measure is said to have a high reliability if it produces similar results under consistent conditions. Test scores are also evaluated as to their reliability : the consistency of what we are measuring. Hence the term standardization, so we know that the scores of every child of every age are being held to the same statistical evaluation, and that their scores are NOT being subjectively interpreted.
Remember that every score, percentile, and confidence interval (to be discussed below) are derived from the statistical manual that comes with every standardized test. It is important for parents to understand the meaning of the numbers and scores that are included in the results of their child’s standardized neuropsychological assessment. It is important to remember that reliability is not measured, it. Test scores are evaluated based on their reliability and validity. A measure is considered reliable if a persons score on the same test given twice is similar.
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