Table 2.

Mean (± standard deviation) of verbal fluency (raw value, i.e., correct responses; decrease in dual condition; cluster size: number of switches; percentage of correct responses produced between 0–15″ and 46–60″) and visuomotor interfering task (raw value, i.e., correct responses; decrease) measurements according to single and dual condition.

	Single condition		Speed interference		Semantic interference		Phonological interference		Flexibility interference
Fluency	Letter	Semantic	Letter	Semantic	Letter	Semantic	Letter	Semantic	Letter	Semantic
Raw value	15.2 ± 4.9	21.1 ± 5.9	10.9 ± 4.2	14.3 ± 4.6	11.1 ± 4.7	13.1 ± 4.6	7.9 ± 3.8	10.1 ± 4.1	9.9 ± 4.0	12.0 ± 4.1
Decrease (%)			−26.5 ± 22	−30.5 ± 19	−25.5 ± 28	−36.6 ± 21	−46.9 ± 24	−51.0 ± 20	−32.4 ± 25	−41.5 ± 20
Cluster size	0.46 ± 0.4	2.10 ± 1.3	0.41 ± 0.4	1.95 ± 1.6	0.37 ± 0.3	1.82 ± 1.5	0.37 ± 0.4	1.49 ± 1.0	0.44 ± 0.4	1.81 ± 1.6
Switch (n)	10.5 ± 3.9	1.50 ± 1.0	7.77 ± 3.5	5.04 ± 2.5	8.05 ± 3.9	4.78 ± 2.6	5.36 ± 3.2	3.83 ± 2.3	6.80 ± 3.4	4.36 ± 2.4
0–15″ (%)	40.2 ± 12	40.1 ± 13	47.2 ± 16	42.9 ± 14	39.9 ± 16	38.0 ± 17	36.4 ± 18	35.7 ± 18	43.9 ± 19	40.7 ± 15
46–60″ (%)	17.5 ± 9	16.6 ± 10	14.3 ± 10	15.4 ± 10	16.3 ± 12	17.3 ± 12	17.4 ± 15	18.2 ± 13	14.8 ± 12	16.7 ± 11
Visuomotor
Raw value	Supplementary Table A		17.6 ± 7	19.5 ± 7	18.1 ± 6	18.8 ± 6	9.0 ± 4	10.1 ± 4	12.2 ± 3	12.6 ± 3
Decrease (%)			−56.6 ± 17	−51.8 ± 16	−33.0 ± 20	−30.0 ± 22	−42.5 ± 23	−35.6 ± 26	−37.0 ± 17	−35.0 ± 16