Table 9.

HRA for TPB with past behaviour as an additional variable.

Variable	R 2	F	ΔR2	ΔF	Beta	Part r
Predicting behaviour
Block 1:	0.561	96.981 **
1. Intention					0.749 **
Block 2:	0.564	48.491 **	0.003	0.561
1. Intention					0.710 **	0.590
2. PBC					0.069	0.057
Block 3:	0.633	42.556 **	0.069	13.946 **
1. Intention					0.155	0.064
2. PBC					−0.015	−0.012
3. Past behaviour					0.660 **	0.263
Predicting intention
Block 1:	0.351	20.250 **
1. Attitude					0.309 *	0.259
2. Subjective Norm					0.363 *	0.303
Block 2:	0.401	16.536 **	0.051	0.6.266 *
1. Attitude					0.152	0.110
2. Subjective Norm					0.286 *	0.230
3. PBC					0.308 *	0.225
Block 3:	0.850	103.026 **	0.448	217.41 **
1. Attitude					0.122	0.088
2. Subjective Norm					0.094	0.073
3. PBC					−0.083	−0.056
4. Past behaviour					0.860 **	0.669

** Significant at the 0.001 level. * Significant at the 0.05 level.