Table 2.

The mean content validity ratio (CVR), content validity index (CVI), impact score and Cronbach's alpha coefficient of Pender's HPM constructs

Row	Pender's HPM constructs	CVI	CVR	Cronbach's alpha coefficient	Impact score
1	Knowledge	0·97	0·89	0·73	1·98
2	Previous relevant behaviour	0·93	0·90	0·85	1·77
3	Perceived self-efficiency	0·93	0·85	0·90	1·77
4	Behaviour-related emotions	0·90	0·89	0·92	1·63
5	Perceived benefits	0·98	0·94	0·89	1·78
6	Perceived barriers	0·98	0·92	0·92	1·72
7	Interpersonal influences	0·99	0·98	0·85	1·62
8	Situational influences	0·99	0·94	0·88	1·68
9	Incentive factors	1·00	0·95	0·71	2·12
10	Commitment to the action plan	1·00	1·00	0·90	1·78
11	Immediate preferences and demand	0·97	0·85	0·74	1·79
12	Behavioural outcome	1·00	1·00	0·90	1·66
	The whole instrument	0·97	0·92	0·84	1·77