There was a weak trend for positive correlation of performance (rho, 0.26, p , 0.102), which became weaker still when partialling out musical expertise (rho, 0.16, p , 0.225), matrices scores (rho, 0.19, p , 0.187) and both together (rho, 0.12, p , 0.292).
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The Beat to Read: A Cross-Lingual Link between Rhythmic Regularity Perception and Reading Skill.
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This correlation remains significant after partialling out the effect of musical expertise (rho, −0.38, p , 0.029) or fluid intelligence (rho, −0.37, p , 0.036), and borderline significant after partialling out both (rho, −0.31, p , 0.072).
Notably, and despite a significant correlation of fluid intelligence with reading skill and a marginally significant one with regularity detection, the relationship between reading skill and regularity detection could only be explained to a small degree by non-verbal intelligence as measured by progressive matrices.