Figure 6.

Internal validation results. Predicted and actual d′ results were correlated using Spearman's rank correlation. Statistical significance was determined by randomly permuting subjects’ d′ scores for 10,000 iterations, repeating the prediction analysis, and determining the fraction of correlations between predicted and actual scores that were as extreme as the original data. The relationship between observed and predicted d′ scores remains significant in permutation testing if the two lowest predicted d′ scores are excluded (ρ = 0.568, p = 0.0048)