Table 2. Summary of intervention effects for comparisons with delayed (>24h) retention intervals.

Study/Experiment	Comparison	Significant group differences (implicit vs explicit group)
		Motor ST	Motor DT	Cognitive DT	Motor DTC	Cognitive DTC	Declarative knowledge
Abdoli et al. (2012) [39]	Errorless vs Errorful	+	+	=	+	N/A	+
Sanli et al. (2014)—Experiment 1-Test Phase 2 [53]	Errorless vs Errorful	=	=	=	=	N/A	N/A
Sanli et al. (2014)—Experiment 2-Test Phase 2 [53]	Errorless vs Errorful	=	=	=	=	N/A	N/A
Orrell et al. (2006b)—Test phase 2 [48]	Errorless vs Explicit	=	=	=	?	N/A	+
Koedijker et al. (2008)—Test phase 2 [41]	Analogy vs Explicit	=	=	=	=	N/A	+
Lam et al.(2009a) [42]	Analogy vs Explicit	=	=	=	=	N/A	+
Lam et al.(2009b) [30]	Analogy vs Explicit	=	+	=	+	N/A	+
Orrell et al. (2006b)—Test phase 2 [48]	Analogy vs Explicit	-	-	=	?	N/A	+
Totsika et al. (2003) [57]	External vs Internal	+	+	N/A	?	N/A	N/A
Wulf et al. (2001) [15]	External vs Internal	+	+	+	=	+	N/A

NB: Green ‘+’: Significantly (p<0.05) better performance or less declarative knowledge for implicit group compared to explicit group; Yellow ‘-’: Significantly (p<0.05) better performance or more declarative knowledge for explicit group compared to implicit group; ‘ = ‘: No significant difference between implicit and explicit groups; ‘?’: Outcome measure was assessed, but corresponding p-values could not be obtained; N/A: Outcome measure not assessed. Abbreviations: DT = dual-task; DTC = dual-task costs.