correlation coefficient

a numerical index reflecting the degree of linear relationship between two variables. It is scaled so that the value of +1 indicates a perfect positive relationship (such that high scores on variable x are associated with high scores on variable y), –1 indicates a perfect negative relationship (such that high scores on variable x are associated with low scores on variable y, or vice versa), and 0 indicates no relationship. The most commonly used type of correlation coefficient is the Pearson product-moment correlation coefficient.

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Psychology term of the day

November 17th 2024

visual agraphia

an impaired ability to write resulting from a failure to recognize letters, numbers, or words. The condition is caused by lesions in the occipitoparietal area of the brain. See agraphia.