,separated by six months.At the second testing session she also administered a similar questionnaire called "Nice," which previous research has shown to be a valid measure of people's ability to get along with people and to make friends.She also administered a questionnaire designed to measure art ability,which she predicted to be unrelated to friendliness.She observed the following correlations among the measures: 
What correlation coefficient value indicates the "Friend" measure is reliable?
Definitions:
Coefficient Of Determination
A statistical measure, represented as R-squared, that shows the proportion of variance for a dependent variable that's predicted by an independent variable(s).
Correlation
A statistical measure that describes the extent to which two variables change together, but does not necessarily imply causation.
Coefficient Of Correlation
A measure that indicates the extent to which two variables change together, and the direction of their relationship, with a range from -1 to 1.
Coefficient Of Determination
A statistical measure that assesses the proportion of variance in a dependent variable predictable from an independent variable, often denoted as R².
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