. Author manuscript; available in PMC: 2023 Apr 14.

Published in final edited form as: J Exp Psychol Gen. 2022 Sep 22;152(3):763–779. doi: 10.1037/xge0001290

Table 6.

Model Fit and Estimated Change-Change Correlations for Correlated LCSMs of Common Factors for Practiced WM Tasks and Drift Rates

Masking time	Model Fit				r (95%-CI)	Δχ² [df]^b

	χ²[df]	CFI	RMSEA	SRMR

12 ms	61.85 [48]	.97	.05	.08	.261 (−.028; .550)	3.08 [1]
24 ms	83.54 [48]	.94	.09	.11	.495 (.173; .816)	8.99 [1]^*
47 ms	79.91 [48]	.94	.08	.09	.379 (−.007; .766)	3.55 [1]
94 ms	72.68 [48]	.95	.07	.07	.249 (−.095; .593)	1.97 [1]
all^a	83.46 [48]	.94	.09	.10	.371 (.046; .696)	4.79 [1]^*

Note. Strong measurement invariance; correlated residuals for same tasks at pretest and posttest, as well as for the Letters and Digits task at pretest and at posttest.

Drift rate estimates for the different masking time conditions averaged before analysis.

χ² difference of likelihood ratio test comparison with a model in which the correlation is constrained to zero.

p < .05.