Table 3. Relationships of cognitive measures with age.

	Sample Size	Mean (SD)	Standardised ß	p-value
PAL -- first trial memory scores	180	19.4 (3.1)	–0.49	<0.001
PAL -- first trial memory scores	85*	20.1 (3.4)	–0.63	<0.001
IED – Pre-EDS errors	176	5.3 (2.1)	0.19	0.029
SWM – between search errors	103	21.9 (18.6)	0.49	<0.001
SWM -- strategy	103	32.8 (5.4)	0.38	0.001
DMS -- total correct for delayed recognition	85	12.5 (2.1)	–0.24	n.s.

Abbreviations. PAL -- Paired associates learning; IED -- Intra-Extra Dimensional Shift; DMS -- Delayed Matching to Sample; SWM -- Spatial Working Memory; n.s. – not significant.

Note. All results are adjusted for education level; * includes only the participants who completed all CANTAB measures.