Table 4.

BAS-2 Graded Response Model IRT Properties

Item	α	β1	β2	β3	β4
1	2.09	− 2.73	− 1.43	− 0.05	1.34
2	3.71	− 1.70	− 0.61	0.50	1.71
3	3.54	− 2.12	− 1.22	− 0.11	0.89
4	5.19	− 1.68	− 0.66	0.27	1.23
5	1.87	− 2.76	− 1.33	0.11	1.54
6	4.08	− 1.31	− 0.33	0.52	1.41
7	2.90	− 1.63	− 0.51	0.40	1.41
8	2.96	− 1.61	− 0.46	0.48	1.54
9	3.04	− 1.55	− 0.61	0.27	1.32
10	3.01	− 1.38	− 0.46	0.41	1.27

α defines the capacity of an item to discriminate between varying levels of body appreciation (θ)

β represents the level of latent trait observed to endorse each item at a specific threshold