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. 2014 Sep 24;9(9):e108929. doi: 10.1371/journal.pone.0108929

Figure 4. Hemispheric asymmetry in new neuron density is correlated with individual success in tutor song copying.

Figure 4

Higher new neuron density on the left than the right measured by a positive Neuron Asymmetry Index (NAI) is correlated with higher quality song imitation measured by the Similarity Index (n = 14; r2 = 0.467; P = 0.007).