Table A1.

Correlation matrix for all measures for full cohort (n=50), additionally showing the multiple correlation of EWB + EWS with other measures (final row/column). Coefficients above the diagonal are Pearson’s r (untransformed data), and coefficients below the diagonal are Spearman’s ρ (ranked data). To control for the false discovery rate across all pairings of ten variables, correlations weaker than 0.3 (positive or negative) are classed as non-significant, and are reported in italic (Benjamini and Hochberg, 1995).

r ρ	LINES	STARS	COPY	DRAW	DBE_MULTI	DBE	EWB	EWS	SIZE-MATCH	LANDMARK	EWB + EWS
LINES		0.75	0.62	0.41	0.68	0.39	0.54	−0.28	0.06	0.28	0.58
STARS	0.74		0.75	0.57	0.71	0.38	0.58	−0.47	0.12	0.24	0.71
COPY	0.63	0.65		0.50	0.65	0.30	0.50	−0.43	−0.02	0.15	0.62
DRAW	0.49	0.49	0.53		0.32	0.20	0.35	−0.25	0.09	0.21	0.41
DBE_MULTI	0.58	0.73	0.55	0.28		0.63	0.77	−0.34	0.03	0.56	0.81
DBE	0.22	0.28	0.28	0.02	0.39		0.85	−0.07	0.27	0.59	0.85
EWB	0.56	0.60	0.50	0.36	0.74	0.59		−0.14	0.23	0.52
EWS	−0.40	−0.61	−0.44	−0.29	−0.45	−0.30	−0.36		0.13	0.05
SIZE-MATCH	0.26	0.11	−0.02	0.15	0.00	0.12	0.26	0.08		0.40	0.28
LANDMARK	0.34	0.35	0.31	0.23	0.48	0.29	0.49	−0.19	0.33		0.53
EWB + EWS	0.60	0.73	0.57	0.40	0.76	0.60			0.32	0.49