Table 2.

Comparison of cognitive scores and their correlation with age across device types.

Cognitive scores			Values, mean (SD)				Cohen d (95% CI)		Correlation with age				Cohen q
			Keyboard		Touch screen				Keyboard		Touch screen
Stop and Go Switching Taska
	Baselineb	1.04 (0.56)		1.09 (0.80)		0.07 (0.02 to 0.12)		0.38		0.32		0.07
	Reverse baselineb	1.10 (0.58)		1.16 (0.59)		0.10 (0.05 to 0.15)		0.35		0.43		−0.09
	Nonswitchb	0.92 (0.32)		0.97 (0.34)		0.13 (0.08 to 0.18)		0.48		0.50		−0.03
	Switchb	1.50 (0.70)		1.53 (0.63)		0.05 (−0.01 to 0.10)		0.35		0.34		0.01
The Figure Identification testc
	The Figure Identification test scored	41.51 (8.43)		41.96 (8.36)		0.05 (0.01 to 0.10)		−0.61		−0.49		−0.17
	Percentage figures incorrecte	5.70 (4.97)		7.40 (5.70)		0.32 (0.27 to 0.37)		−0.04		−0.05		0.00
	Median response timesb	4.76 (1.78)		4.53 (1.74)		−0.13 (−0.18 to −0.08)		0.56		0.45		0.15

^aFor Stop and Go Switching Task, keyboard n=2820 and touch screen n=3309.

^bMeans and SDs are presented for seconds.

^cFor the Figure Identification test, keyboard n=3182 and touch screen n=3309.

^dMeans and SDs are presented for the number of figures.

^eMeans and SDs are presented for percentage.