Recall that the researchers indicated, “[W]e converted each individual's raw test score into age- corrected z scores, reflecting the extent to which an individual's test performance diverges from that of healthy, age-matched peers [from existing large normative data sets]... []ndividuals' z Scores for individual tests within a cognitive domain were averaged to create five cognitive domain composite scores: attention/working memory, learning/memory, language, processing speed, and executive functioning composites" (p. 85). Imagine a participant had an average z score of –1.00 in the domain of attention/working memory. What would this z= -1.00 mean? O A. On average, the participant scored lower than 100% of the healthy, age-matched individuals in the domain of attention/working memory. O B. On average, the participant scored one standard deviation above the mean of healthy age-matched individuals in the domain of attention/working memory. O C. On average, the participant scored one standard deviation below the mean of healthy age-matched individuals in the domain of attention/working memory. O D. On average, the participant scored one point lower than the mean of healthy age-matched individuals in the domain of attention/working memory.

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