Table 2. Factor loading of items from EFA of the 15-item WEUS.

	Factor 1- Mood Modification	Factor 2- Salience	Factor 3- Conflict	Factor 4- Social motivation
Item 2	.822	.257	.176	.128
Item 1	.808	-.009	.174	.117
Item 3	.785	.275	.179	.129
Item 5	.612	.325	.071	.337
Item 6	.248	.797	.163	.094
Item 8	.046	.768	.295	.042
Item 10	.155	.758	.318	.102
Item 7	.328	.658	.287	.150
Item 19	-.009	.349	.741	-.019
Item 16	.284	.263	.712	.141
Item 17	.262	.272	.679	.196
Item 12	.349	.336	.516	.261
Item 22	.047	.152	-.033	.870
Item 24	.381	-.075	.341	.650
Item 20	.341	.173	.302	.526