Table 5. Test-retest reliability for the physiotherapy experts (n = 12) and the physiotherapy students (n = 17).

R4C instrument: Domain and subscale	Physiotherapy experts				Physiotherapy students
	M (SD) Test 1	M (SD) Test 2	ICC a	ICC a,b	M (SD) Test 1	M (SD) Test 2	ICC a	ICC a,b
D1.1 Physiotherapist; Knowledge	38.5 (5.0)	39.5 (4.8)	0.89***		37.4 (4.5)	38.8 (4.2)	0.87***
D1.2 Physiotherapist; Cognition	37.3 (5.5)	38.6 (4.9)	0.94***		36.4 (5.1)	35.7 (4.6)	0.87***
D1.3 Physiotherapist; Metacognition	43.3 (3.4)	43.5 (3.8)	0.75*		39.1 (5.2)	39.4 (5.0)	0.92***
D1.4 Physiotherapist; Psychological factors	182.2. (10.6)	177.6 (13.7)	0.89***		153.4 (17.8)	154.6 (18.7)	0.85***
D1.5 Physiotherapist; Contextual factors	17.6 (5.7)	19.7 (4.5)	0.77**		15.1 (3.9)	16.4 (3.2)	0.81***
D2 Input from client	53.0 (4.1)	44.5 (6.3)	0.31	0.46*	40.6 (5.8)	39.2 (5.0)	0.72**
D3 Functional behavioural analysis	27.9 (1.6)	28.3 (2.3)	0.31	0.56	26.0 (2.2)	25.4 (1.9)	0.60*
D4 Strategies for behaviour change	24.1 (2.1)	21.3 (2.8)	0.45	0.61*	21.0 (3.2)	21.5 (2.8)	0.45	0.55

^a Two-way mixed model, absolute agreement and average measure.

^b One outlier (the expert or student with the largest score difference between test one and two was excluded in the analysis).

* p < 0.05; ** p < 0.01; ***p < 0.001.