Table 3.

Performance on cognitive tests: first versus second administration (N=189)^a.

Testb	Variable	First administration		Second administration		P c
		p50	p25; p75	p50	p25; p75
Click	Time in seconds, mean	4.29	3.64; 5.49	4.32	3.68; 5.36	.70
Maze A
	Time in seconds, mean	118.66	86.95; 168.67	101.16	79.28; 129.76	<.001
	Clicks, mean n	59.00	53.00; 70.33	54.00	48.33; 60.67	<.001
	Total errors, mean n	17.33	13.33; 25.00	14.00	10.67; 18.00	<.001
Maze B
	Time in seconds	85.35	62.87; 112.64	72.11	51.72; 92.99	<.001
	Clicks, n	48.00	42.00; 55.00	44.00	37.00; 51.00	<.001
	Total errors, n	10.00	7.00; 15.00	8.00	4.00; 12.00	<.001
Cards	Composite variabled	1.26	1.09; 1.36	1.28	1.15; 1.40	<.001
Marbles	Composite variabled	2.21	1.48; 3.31	2.40	1.77; 3.33	.18

^aObjective of this comparison: identification of potential learning effects. Lower scores indicate better performances, except for the Cards and Marbles composite variables, where higher scores indicate better performances.

^bMaze A: Sum of the initial three rounds of the Maze task. Maze B: Final (fourth) round of the Maze task.

^cWilcoxon signed-rank test (nonparametric paired test).

^d([1/(incorrect answers+1000) ] /time) * 100,000.