Table 2.

Mean verbal learning and memory scores for the SRC and OI control groups.

Tests	Occasion	SRC			OI controls			p-value	Cohen’s da
		Mean	SD	Range	Mean	SD	Range
HVLT-R delay	Day 7–10	7.7	1.5	6–10	8.9	1.9	6–12	0.078	0.72 (1.70)
	Day 30	8.8	1.6	5–11	9.3	1.7	6–11	0.486	0.28 (1.66)
HVLT-R total	Day 7–10	23.3	2.3	19–27	25.2	3.9	17–31	0.135	0.61 (3.17)
	Day 30	25.5	3.9	16–32	26.9	2.9	20–30	0.286	0.43 (3.42)

^aCohen’s d effect size 0.2 = small, 0.5 = moderate, 0.8 = large. Pooled standard deviations for the effect sizes are in parentheses.

HVLT-R, Hopkins Verbal Learning Test – Revised.