. Author manuscript; available in PMC: 2021 Oct 8.

Published in final edited form as: J Cogn Neurosci. 2020 May 7;32(8):1508–1524. doi: 10.1162/jocn_a_01572

Table 2.

Correlations and Factor Loadings of Selected WM Performance Measures

Measure	1	2	3	4	5	6	PC1
1. Count-span accuracy	–	.13	.30	.43^*	.02	.36^*	.56^***
2. In-scanner WM accuracy	.13	–	.54^**	.43^*	.36^*	.19	.71^***
3. In-scanner WM 1-RT	.30	.54^**	–	.30	.37^*	.38^*	.78^***
4. n-back accuracy	.43^*	.43^*	.30	–	.29	.29	.72^***
5. n-back 1-RT	.02	.36^*	.37^*	.29	–	.02	.51^***
6. Prescan WM capacity	.36^*	.19	.39^*	.29	.02	–	.56^***

Six WM measures selected for latent variable (WM_L) analyses and their intercorrelations (see main text for selection details). PC1 = loadings of each measure with Principal Component 1 (i.e., WM_L). RTs were reversed scored for ease of interpretation (1-RT). p values, uncorrected.

p < .05

^**

p < .01

^***

p < .001.