TABLE 1.

Different indices for the choice of the model order obtained after the inference at the group level (i.e., combining young and old subjects together) are reported

Model order	FE	avLL	AIC	BIC	SD/mean
2	2767676	−18285	276680	1352976	0.17
3	2746036	−21496	403162	2017627	0.19
4	2734664	−28209	536653	2689307	0.19
5	2725354	−27130	654562	3345422	0.19
6	2717131	−26139	772651	4001735	0.19
7	2709337	−29693	899836	4667162	0.20
8	2702429	−28785	1018101	5323687	0.20

Note: In the first column the lowest free energy value, obtained among the 200 realizations is reported. Starting from this value, we computed the average log‐likelihood (second column), Akaike (third column), Bayes Information Criterion (fourth column), and ratio between the SD and mean values computed on the averaged CVs within a state (fifth column). The two indices that were informative for the model selection are marked in bold.