## 4 Experiment Results and Data Analysis
### Eye-Tracking-Data Analysis
The FPV in Texture B was not significantly greater (in the paired t-test, t(6) = \(-\)2.768, \(p\) = 0.016) than that for Texture A when the choice of similarity was Texture B. Analysis results showed that there was no significant relationship between final similarity choices and FPV in the ROIs. (3) FTCs between different ROIs represent the fixation-transfer counts between different ROIs. In this research, the subjects viewed three synthesized texture images in one scene. Their final similarity choices between Textures A and B were determined by checking which of the two textures was more similar to Texture S. Therefore, we mainly considered the FTCs between Textures S and A (FTCs_S,A) and the FTCs between Textures S and B (FTCs_S,B). As per Question (2) in the Introduction, we hypothesized that visual-similarity perception may influence eye-movement patterns, and there are two relationships between the final similarity choice and the FTCs between different textures (especially Textures A and S and Textures B and S). Moreover, [PERSON] et al. [40] demonstrated that gaze duration and fixation frequency tended to influence the final choice. Therefore, the relationships that we hypothesized are shown as follows:  
I. If the final similarity choice was Texture A, then FTCs_S,A> FTCs_S,B. II. If the final similarity choice was Texture B, then FTCs_S,A<FTCs_S,B. To verify the hypothesis, we conducted a paired t-test to evaluate differences in FTCs_S,A and FTCs_S,B for the similarity choice between Textures A and B in the four scenes. The independent variable used in the t-test was the FTCs between different ROIs under a certain finial similarity choice (Texture A or B). Results are shown in Table 3. For Scene 1, FTCs_S,A was significantly greater (in the paired t-test, t(16) = 4.883, \(p\) < 0.001) than FTCs_S,B when the similarity choice was Texture A. FTCs_S,A was much less (in the paired t-test, t(12) = \(-\)3.32, \(p\) = 0.006) than FTCs_S,B when the choice of similarity was Texture B. The same results were obtained in Scene 2. FTCs_S,A was significantly greater (in the paired t-test, t(11) = 2.966, \(p\) = 0.013) than FTCs_S,B when the similarity choice was Texture A. FTCs_S,A was considerably less (in the paired t-test, t(17) = \(-\)2.247, \(p\) = 0.038) than FTCs_S,B when the similarity choice was Texture B. In addition, in Scene 3, FTCs_S,A was significantly greater (in the paired t-test, t(23) = 6.075, \(p\) < 0.001) than FTCs_S,B when the similarity choice was Texture A. FTCs_S,A was much less (in the paired t-test, t(5) = \(-\)3.464, \(p\) = 0.018) than FTCs_S,B when the choice of similarity was Texture B. Lastly, in Scene 4, FTCs_S,A was significantly greater (in the paired t-test, t(16) = 3.289, \(p=0.005\)) than FTCs_S,B when the similarity choice was Texture A. FTCs_S,A was less (in the paired t-test, t(12) = \(-2.241\), \(p=0.045\)) than FTCs_S,B when the choice of similarity was Texture B. Examples of FTCs for the four scenes are shown in Figure 6. On the basis of \(p\)- and [PERSON]'s d-values, analysis results verified the hypothesis that the final visual-similarity selection was related to FTCs between the different ROIs, and it influenced the fixation-transfer counts between different ROIs.