Table S2.

Results of paired-samples permutation tests comparing treatment outcome measures and standardized test scores at each time point relative to pre-treatment and post-treatment for participants who underwent LRT

	Pre-treatment performance vs				Post-treatment performance vs
	Post-treatment	3-month follow-up	6-month follow-up	12-month follow-up	3-month follow-up	6-month follow-up	12-month follow-up
Trained
n	21	18	18	19	18	18	19
t	−16.00	−11.92	−18.22	−7.98	1.40	2.10	3.76
P-value	<0.001*	<0.001*	<0.001*	<0.001*	0.071	0.264	0.037
Untrained
n	21	18	18	19	18	18	19
t	−3.55	−3.43	−2.92	−1.45	0.00	0.34	1.81
P-value	<0.001*	0.002*	0.007*	0.189	1.00	0.784	0.095
BNT
n	21	17	16	16	18	16	17
t	−1.78	1.00	2.60	3.27	1.79	4.17	3.93
P-value	0.010*	0.448	0.061	0.061	0.264	0.013*	0.031
WAB
n	21	18	18	17	18	18	17
t	0.36	2.68	3.40	5.23	3.48	3.63	5.45
P-value	0.164	0.071	0.016	<0.001*	0.016*	0.003*	<0.001*

Notes: One-tailed tests were used for trained items for all pre-treatment comparisons as well as for the pre–post comparison for untrained items. All other comparisons utilized two-tailed tests. Bonferroni-corrected thresholds for significance: P<0.013 for comparisons to pre-treatment performance and P<0.017 for comparisons relative to post-treatment performance. Analyses were conducted using the exactRankTests package¹ in R (Version 3.3.1; 2016).

^*Significance at Bonferroni-corrected P-value <0.05.

Abbreviations: BNT, Boston Naming Test; LRT, lexical retrieval treatment; WAB, Western Aphasia Battery.