Table 1. Summary statistics on the distribution of the number of Gabor elements and additional shape properties for the 184 objects in the stimulus set (statistics Q₁ and Q₃ denote the first and third quartile, respectively). Note: Compactness (A/P²) was calculated from continuous area (A) and perimeter (P) of the embedded outlines (A and P values are not included in the table).

	Number of Gabor elements				Compactness	Mean path angle
	contour	interior	exterior	total
Mean	41.10	26.47	484.20	551.8	0.0297	8.08
SD	14.54	17.59	27.11	1.2	0.0175	9.48
Min	15	1	396	524	0.0029	11.54
Q1	30	14	464	544	0.0156	21.14
Median	36.5	23	489	552	0.0263	27.04
Q3	48	36	504	558	0.0400	33.66
Max	95	74	533	580	0.0728	65.27