Table 6.

Prognostic factors for training improvement in non-verbal long-term memory

Study	Test for outcome assessment	Dependent variable	Prognostic factor
Multiple regression
			Age	Education	Sex	Neuropsychology	Imaging	Others
Park et al. [7]	Simple Rey Figure Test Delayed Recall However, results are reported for “cognitive function” as outcome measure, which is not clearly defined	Change score Post-pre	→	↓*	→	Pre-test scores of neuropsychological tests (Digit Span Test, Spatial Span Test, Categorical Fluency Test, short version of Boston Naming test) →
Correlation analysis
Hampstead et al. [36]	Object Location Assignment accuracy	Modified change score Percentage of improvement relative to possible improvement after accounting for pre-test score				Trial Making Test B/A ↓ RBANS ↑	Amygdala volume ↑ Hippocampus volume ↑ Inferior lateral ventricles volume ↓
Group comparisons (ANOVA, t test)
McDougall et al. [40]	Brief Visuospatial Memory Test- Revised	ANOVA with pre- and post-test scores	→	→ *				Ethnicity—Hispanics and Blacks ↑* than Whites
O’Hara et al., [43]	Revised Benton Visual Retention Test	ANOVA with pre- and post-test scores						Apolipoprotein E4 ↓*
Mixed models
/

Studies are sorted according to the statistical method used for obtaining the prognostic factors. RBANS Repeatable Battery for the Assessment of Neuropsychological Status; ↑ the higher the prognostic factor, the higher the improvement/positive correlation; ↓ the lower the prognostic factor, the higher the improvement/negative correlation; → no direction of effect reported; * significant; x unclear reporting