Table A1 Measurement model constructs...

Table A1

Measurement model constructs and reliability indicators

	Items	Factor loadings	Cronbach α	Composite reliability
	Leftover Food Management (LFM)		0.83	0.79
LFM_1	Use up the oldest food first	0.727
LFM_4	Move the oldest food items to the front or top	0.645
LFM_5	Use storage containers to keep leftovers	0.667
LFM_6	Put leftovers in the fridge/freezer	0.660
LFM_7	Keep the temperature in the fridge below 4°C and freezer below −18 C	0.741
	Motivation (MOT)		0.86	0.84
MOT_1	I aim to have no unnecessary leftovers	0.614
MOT_2	I feel guilty about throwing away food leftovers	0.672
MOT_3	I am aware of the food leftovers that I waste	0.627
MOT_7	If I reduce the amount of leftovers I dispose of, I am saving the planet	0.752
MOT_8	If I reduce the amount of leftovers I dispose of, I am saving money	0.784
MOT_9	If I reduce the amount of leftovers I dispose of, I am saving time	0.748
	Opportunity (OPP)		0.51	0.63
OPP_1	I am too tired to prepare the meal for which I bought the ingredients^R	0.742
OPP_2	Unexpected circumstances occur, in which I had food leftover^R	0.717
OPP_3	I am under time pressure in my day-to-day life^R	0.792
OPP_4	The meals during the week get diverged from what I had planned^R	0.714
OPP_5	I feel under stress in taking care of work^R	0.814
OPP_8	I use television programmes dedicated to cooking, to learn leftover recipes	−0.463
OPP_10	I use websites and social media channels, to learn leftover recipes	−0.419
	Ability (ABI)		0.88	0.87
ABI_1	I plan before going to the shop	0.647
ABI_2	I use a shopping list	0.572
ABI_3	I am precise in cooking the right quantities	0.709
ABI_4	I know what food I have in stock	0.823
ABI_5	My shelves and/or fridges are organised	0.794
ABI_6	I pay attention to the expiry dates	0.691
ABI_7	Storing my food leftovers in the right way	0.779

	Items	Factor loadings	Cronbach α	Composite reliability
	Leftover Food Management (LFM)		0.83	0.79
LFM_1	Use up the oldest food first	0.727
LFM_4	Move the oldest food items to the front or top	0.645
LFM_5	Use storage containers to keep leftovers	0.667
LFM_6	Put leftovers in the fridge/freezer	0.660
LFM_7	Keep the temperature in the fridge below 4°C and freezer below −18 C	0.741
	Motivation (MOT)		0.86	0.84
MOT_1	I aim to have no unnecessary leftovers	0.614
MOT_2	I feel guilty about throwing away food leftovers	0.672
MOT_3	I am aware of the food leftovers that I waste	0.627
MOT_7	If I reduce the amount of leftovers I dispose of, I am saving the planet	0.752
MOT_8	If I reduce the amount of leftovers I dispose of, I am saving money	0.784
MOT_9	If I reduce the amount of leftovers I dispose of, I am saving time	0.748
	Opportunity (OPP)		0.51	0.63
OPP_1	I am too tired to prepare the meal for which I bought the ingredients^R	0.742
OPP_2	Unexpected circumstances occur, in which I had food leftover^R	0.717
OPP_3	I am under time pressure in my day-to-day life^R	0.792
OPP_4	The meals during the week get diverged from what I had planned^R	0.714
OPP_5	I feel under stress in taking care of work^R	0.814
OPP_8	I use television programmes dedicated to cooking, to learn leftover recipes	−0.463
OPP_10	I use websites and social media channels, to learn leftover recipes	−0.419
	Ability (ABI)		0.88	0.87
ABI_1	I plan before going to the shop	0.647
ABI_2	I use a shopping list	0.572
ABI_3	I am precise in cooking the right quantities	0.709
ABI_4	I know what food I have in stock	0.823
ABI_5	My shelves and/or fridges are organised	0.794
ABI_6	I pay attention to the expiry dates	0.691
ABI_7	Storing my food leftovers in the right way	0.779

Note(s): ^R Reverse coded

All the factor loadings are significant at the 1% level (p < 0.001)

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