Table 2.

Means and standard deviations on words' characteristics per list and equivalence between lists.

	O-simple; G-simple		O-difficult; G-simple		O-simple; G-difficult		O-difficult; G-difficult
Words characteristics	M	SD	M	SD	M	SD	M	SD
Number of letters	5.24a	0.91	5.38ab	0.53	6.11ab	0.85	6.27b	0.67
Digram frequency	2.52	0.35	2.85	0.38	2.81	0.29	2.60	0.32
Success rate for G2 (EOLE)	90.90a	8.14	12.33b	6.16	85.84a	7.91	12.91b	10.08
Graphic complexity index	13.24a	2.21	13.31a	1.56	22.63b	2.42	23.20b	2.81
Items	cabine carte cheval dictée gauche lire lundi papa police robe	cabin card horse dictation left read Monday dad police dress	caddie cadet coulis craie deuil gueule laitue mulot talent trait	trolley cadet grout chalk grief mouth lettuce mouse talent trait	borne branche bravo brique chambre nombre ouvrage poivre sabre score	terminal branch cheers brick room number book pepper sword score	accord annexe boxeur brebis horaire horreur kiosque membre sirop ressort	deal appendix boxer ewe schedule horror booth member syrup spring

O-simple, orthographically simple words; O-difficult, orthographically difficult words; G-simple, graphically simple words; G-difficult, graphically difficult words; G2, Grade 2; EOLE, echelle d'acquisition en orthographe lexicale [lexical spelling acquisition scale]; Pothier and Pothier (2003). Values with different superscript letters a and b differ significantly (Bonferroni contrasts all ps < 0.001).