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Mean individual stability coefficients (N = 1,063) across ten GZTS scales as a function of retest interval in years. Significant quadratic (dotted line; R2 = .027) and exponential decay (solid line; R2 = .030) curves are superimposed. Data from 15 individuals whose mean coefficients are less than 0.0 do not appear in the Figure, but were used in the analyses.
