Charles Spearman's research revealed that,while different measures were positively correlated,they were _____ perfectly correlated.
A)sometimes
B)always
C)usually
D)not

Question

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Spearman's research showed that different measures of intelligence were positively correlated, meaning that as performance on one measure increased, so did performance on another. However, they were not perfectly correlated, meaning that two individuals' scores could vary on different measures even if they had similar overall levels of intelligence.

Charles Spearman's Research Revealed That,while Different Measures Were Positively Correlated,they