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. 2011 Apr 6;6(4):e18262. doi: 10.1371/journal.pone.0018262

Figure 6. Cubic curves of Inline graphic spectral embedding.

Figure 6

Inline graphic The embedded path graph was fitted by the cubic function in the form of Inline graphic. (A - E) CoefficientsInline graphic,Inline graphic,Inline graphic,Inline graphic and Inline graphic were compared between the two blocks and within each block. There are significant differences between valenced pictures and arousal pictures for the coefficients Inline graphic,Inline graphic,Inline graphic and Inline graphic, where coefficients Inline graphic and Inline graphic were different in graded arousal levels, indicating a non-linear effect of arousal. (F) The embedded curves in each affective level of valence and arousal. Star marks significant differences (one star: p<0.01; two stars: p<0.01 and three stars: p<0.001; by ANOVA test). Here Inline graphic, Inline graphic and Inline graphic denote the 2nd, 3rd and 4th eigenvector, respectively.