A GLMM logistic regression was conducted with the fixed effects of deformation intensity, viewing angle, deformation type, and material, and all of their higher-order interactions (
Table 1). We also included a random intercept and slope per participant. Aside from the new predictor of deformation type, the effects observed were similar to those in the previous experiment. We found significant main effects of viewing angle (
χ2 = 87.18,
p < 0.0001) and deformation intensity (
χ2 = 176.88,
p < 0.0001). There was a significant main effect of material (
χ2 = 14.43,
p = 0.0024) and Tukey's HSD post hoc test showed that the transparent material was significantly different from the dotted matte (
z = 4.09,
p = 0.0003), glossy (
z = 3.38,
p = 0.0040) and mirror (z = 3.35,
p = 0.0045). There was a significant main effect of deformation type (
χ2 = 62.51,
p < 0.0001), and Tukey's HSD post hoc test showed that the twist was significantly different from the squeeze (z = 8.68,
p < 0.0001) and jiggle (
z = 7.08,
p < 0.0001). We also found a significant interaction between deformation type and viewing angle (
χ2 = 16.55,
p = 0.0003), whereas twist was significantly different from squeeze (0° viewing:
z = 8.86,
p < 0.0001; 45° viewing:
z = 3.45,
p = 0.0017) and jiggle (0° viewing: z = 6.51,
p < 0.0001; 45° viewing: z = 4.79,
p < 0.0001) in both viewing angles. On the other hand, jiggle versus squeeze showed similar results at 0° viewing (
z = 1.26,
p = 0.4168) and 45° viewing conditions (
z = 1.85,
p = 0.1528).