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the average standard score on the KLPA-2 is 100, the majority of participants (#2, #3, and #4) attained standard scores which were at least 2 standard deviations below the mean. However, scores for Participants #1 and #5 fell within the average range (95 and 99). Box plots (Figure b and c) reveal that the majority of participants have great variability in phonological skills. As seen in the figure b, all of the participants attained percentile ranks that were below average (50th percentile) based on their chronological ages (CAs).
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Buhler et al. (2007) studied this question.
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