Table 6.

Results of permutation tests comparing change scores between the two dosing paradigms (LRT1 vs. LRT2).

		Change score from pre-treatment to				Change score from post-treatment to
		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	18	16	16	17	16	16	17
	t	1.5	1.5	0.9	1.4	0.3	−0.3	0.4
	p	0.950	0.920	0.806	0.922	0.606	0.411	0.634
Untrained	n	18	16	16	17	16	16	17
	t	−2.3	−0.8	−1.4	−0.5	0.8	0.7	1.3
	p	0.037	0.505	0.179	0.663	0.504	0.577	0.231
BNT	n	16	14	13	13	14	12	12
	t	1.1	−0.6	0.7	−1.4	0.0	0.3	−0.4
	p	0.283	0.685	0.532	0.255	1.000	1.000	0.691
WAB	n	18	16	16	15	16	16	15
	t	−2.3	−0.9	−1.4	−0.6	0.9	−0.1	0.0
	p	0.035	0.429	0.172	0.729	0.382	0.870	0.961

Note. One-tailed tests were utilized in comparing trained item change scores. 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 to post-treatment performance. Differences in n for Boston Naming Test (BNT) due to comparing an equivalent, frequency-matched set of items across LRT1 and LRT2. Because an equivalent item set could not be derived, two participants (sv6, who received LRT1, and sv1, who received LRT2) were not included in between-subjects comparisons. Trained = trained items; Untrained = untrained items; LRT = Lexical Retrieval Training; WAB = Western Aphasia Battery.