Table 2.

Parameters of locomotion in a dark large arena (2 × 2 m). As shown, level of activity was not affected, whereas the spatiotemporal structure underwent significant changes. Bonferroni adjustment of p-value was calculated by P = 0.05/10 = 0.005. Mean (± SEM) are followed by the results of Tukey HSD test, indicating the numbers of the significantely different test groups (as appeared in the top row).

	Empty (1)	4 Stones (2)	16 Stones (3)	F18;p
Level of activity
Traveled distance (m.)	116.51 ± 7.52	110.17 ± 11.58	99.09 ± 10.38	0.91; ns
Speed (m/sec)	0.21 ± 0.02	0.21 ± 0.02	0.20 ± 0.01	0.24; ns
Temporal Structure
Stops	159.1 ± 18.23	185.6 ± 9.43	322.7 ± 32.01,2	18.67; .0004
# of trips	40.14 ± 5.532,3	62.57 ± 3.261,3	134.14 ± 13.971,2	36.68; 0.000001
Stops/trip	4.04 ± 0.232,3	3.01 ± 0.231,3	2.41 ± 0.041,2	21.20; 0.00019
Trip length (m.)	3.08 ± 0.262,3	1.81 ± 0.251,3	0.74 ± 0.041,2	36.41;0.00000
Inter-stop distance (m.)	0.77 ± 0.072,3	0.59 ± 0.051,3	0.31 ± 0.011,2	26.75; <0.00001
Spatial Distribution
Center stops (%)	25.8 ± 1.32,3	49.8 ± 4.81,2	70.0 ± 1.01,2	66.09; 0.00000
Center time (%)	29.3 ± 4.22,3	53.4 ± 6.01	57.7 ± 3.61	11.58; 0.00058
Meander	-0.44 ± 0.031,2	-0.33 ± 0.021,3	-0.29 ± 0.051,2	7.10; 0.0053