Appendix 1.

Results from standardized testing, sorted by DDK mono-/multisyllable z score difference.

Code	Sex	Age	Aff.	DDK monos.	DDK multis.	DDK diff. monos. – multis.	Rep. key tap	NWR	NRT	WID	WATT	SWE	PDE	WIAT Sp.	VIX	NIX
1203	M	39	N	1.02	1.76	−0.74	0.70	0.67	1.60	0.53	1.13	0.87	1.00	1.87	1.67	1.00
2404	M	33	N	0.22	0.41	−0.18	0.97	−0.33	2.14	−0.27	0.67	0.60	0.00	0.73	0.67	1.87
3204	M	18	N	−0.69	−0.69	0.00	−0.27	−0.67	−2.41	0.47	−0.20	−0.60	1.33	0.53	1.20	1.53
3203	F	21	N	1.17	1.16	0.01	0.55	0.00	−0.01	0.60	1.47	0.87	1.33	1.13	0.93	1.13
5402	F	28	N	1.37	1.29	0.08	1.18	0.67	2.50	0.40	0.07	0.87	1.00	1.60	1.93	1.73
5407	M	47	N	1.38	1.30	0.08	0.56	−1.33	−3.61	−0.07	−0.60	−0.60	−1.27	−0.67	−0.27	0.67
1204	M	45	N	0.97	0.83	0.14	−0.03	0.33	0.40	0.80	0.87	0.87	0.80	1.87	1.80	−1.00
3101	M	57	N	0.98	0.78	0.19	0.61	−0.67	1.60	0.60	0.60	NA	NA	1.87	1.47	1.33
3202	F	27	N	1.20	0.98	0.22	−0.92	0.00	1.78	NA	NA	0.87	1.33	1.60	1.47	0.40
5406	F	47	N	0.61	0.23	0.37	0.89	−1.00	2.14	−0.87	−1.13	−1.40	−1.93	−1.47	0.60	0.33
2405	F	34	N	0.97	0.45	0.52	0.22	−0.67	2.50	−0.13	1.93	−0.13	0.00	1.33	1.00	0.73
5308	F	65	N	−0.36	−0.93	0.57	−0.08	−1.00	−1.09	−0.20	−0.53	−0.67	−1.20	NA	NA	NA
1205	F	41	N	0.22	−0.42	0.64	−0.11	1.00	1.78	0.27	0.73	−1.33	−0.47	1.60	1.13	1.07
5403	M	31	N	0.50	−0.15	0.65	0.19	−0.67	2.00	0.27	0.33	−0.87	−0.40	0.93	1.27	0.20
2203	F	69	N	−1.16	−1.86	0.70	−0.20	−0.33	−0.01	−0.27	0.40	NA	NA	−0.47	NA	0.47
4204	F	31	N	0.57	−0.18	0.75	−0.84	−0.33	−0.37	−0.20	0.07	−0.27	−1.13	0.73	0.80	NA
3102	F	56	N	1.77	0.85	0.91	0.65	−0.33	−0.01	1.20	0.80	0.60	0.60	1.33	1.40	0.80
4203	M	35	N	0.87	−0.06	0.94	0.53	0.00	0.40	−0.13	0.80	0.40	−0.13	1.33	NA	NA
2201	F	69	Y	−0.29	−1.63	1.35	−0.12	−1.00	0.35	−1.00	−0.73	−0.80	−1.67	−1.47	−0.53	0.93
2303	F	51	Y	0.43	−1.66	2.09	0.19	−1.67	−2.17	−1.33	−0.73	−1.40	−1.93	−2.47	−0.33	0.13
2401	M	29	Y	0.61	−1.57	2.18	1.41	−1.00	−7.21	−0.80	0.07	0.40	−0.87	0.13	−0.13	−0.67

Note. All units in z scores; Aff. = affectation status for the motor sequencing deficit; Y = yes; N = no.