Table 5.

Internal consistency of the RES (total score and subscale scores).

	Cronbach's α		Range inter-item correlation		Range item-total correlation
	Dutch	English	Dutch	English	Dutch	English
RES
Total score	0.825	0.898	0.122–0.665	0.318–0.751	0.370–0.653	0.539–0.738
Self-efficacy subscale	0.786	0.870	0.197–0.601	0.367–0.661	0.407–0.645	0.533–0.766
Self-confidence subscale	0.838	0.887	0.607–0.665	0.682–0.751	0.678–0.723	0.762–0.817

RES total = total score of item 1–9; RES self-efficacy = total score of items 2, 3, 4, 5, 6, and 8; RES self-confidence = total score of items 1, 7, and 9.