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

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Ni et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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(A) Fiedler constant for the three affective levels (H, M, L) of the valence and arousal blocks. The scan paths of arousal pictures have larger Fiedlers compared to scan paths of valenced pictures. Within the arousal block, the Fiedler is significantly different across three graded levels, indicating a non-linear effect of arousal. (B) Diameter of path graph. The average diameter of path graph for valenced pictures is larger than that for arousal pictures. Significant within-block differences could be observed in arousal block, indicating non-linear effect of arousal. (C and D) Energy metrics of and embeding. and showed differences between the valence and arousal block. For arousal pictures, there is a significant within-block difference, suggesting a non-linear arousal effect. Star marks significant difference (one star: p<0.05; two stars: p<0.01 and three stars: p<0.001; by ANOVA test).

Inline graphic — (A) Fiedler constant for the three affective levels (H, M, L) of the valence and arousal blocks. The scan paths of arousal pictures have larger Fiedlers compared to scan paths of valenced pictures. Within the arousal block, the Fiedler is significantly different across three graded levels, indicating a non-linear effect of arousal. (B) Diameter of path graph. The average diameter of path graph for valenced pictures is larger than that for arousal pictures. Significant within-block differences could be observed in arousal block, indicating non-linear effect of arousal. (C and D) Energy metrics of and embeding. and showed differences between the valence and arousal block. For arousal pictures, there is a significant within-block difference, suggesting a non-linear arousal effect. Star marks significant difference (one star: p<0.05; two stars: p<0.01 and three stars: p<0.001; by ANOVA test).