Table 4.

Pearson’s correlation coefficient between tapping span and spatial working memory tests and between tapping span and digit span for the posterior cortical atrophy group.

	Tapping Span Forward	Tapping Span Backward	Delayed matching task in one-location	Delayed matching task in two-location	Shape-from-moving-dots task	Digit Span Forward	Digit Span Backward
Tapping span forward	1	0.93	0.85	0.75	0.85	0.61	0.62
Tapping span backward	0.93	1	0.75	0.64	0.93	0.58	0.51
Delayed matching task in one-location	0.85	0.75	1	0.78	0.68	0.49	0.74
Delayed matching task in two-location	0.75	0.64	0.78	1	0.65	0.21	0.88
Shape-from-moving-dots task	0.85	0.93	0.68	0.65	1	0.33	0.41
Digit span forward	0.61	0.58	0.49	0.21	0.33	1	0.40
Digit span backward	0.62	0.51	0.74	0.88	0.41	0.40	1

Bold values represent those with P-values of < 0.05.