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Mean synchronization accuracy (vector angle, in degrees) and consistency (vector length, from o to 1) for Accurate and Less accuratesingers in terms of absolute pitch (A,B) and of relative pitch (C,D), when participants sang with lyrics and with a syllable. **p < or = 0.01, *marg. = marginally significant (p = 0.06). Error bars indicate 95% confidence intervals (A,C) or Standard Error of the Mean (B,D).
