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Table 2 Comparison of goodness of fit between models with and without group as fixed factor for mean fNIRS measures from a subset of channels

From: Individual differences in skill acquisition and transfer assessed by dual task training performance and brain activity

Dependent variable Individual differences Comparison against null model Comparison between models
Channel Biomarker Log likelihood \({\chi }^{2}\) p value \({\chi }^{2}\) p value
2 HbO No − 341.48 25.79  < 0.001 30.21  < 0.001
Yes − 351.28 72.57  < 0.001
HbR No − 326.38 55.01  < 0.001 7.98 0.157
Yes − 347.29 77.04  < 0.001
7 HbO No − 380.94 37.02  < 0.001 42.39  < 0.001
Yes − 400.75 14.61  < 0.001
HbR No − 359.75 79.40  < 0.001 28.93  < 0.001
Yes − 386.29 43.49  < 0.001
11 HbO No − 389.93 16.79  < 0.001 6.53 0.258
Yes − 452.77 39.11  < 0.001
HbR No − 386.66 23.31  < 0.001 30.55  < 0.001
Yes − 437.50 69.12  < 0.001
12 HbO No − 406.72 16.39  < 0.001 16.32 0.006
Yes − 392.65 67.45  < 0.001
HbR No − 398.56 30.14  < 0.001 42.39  < 0.001
Yes − 371.46 109.79  < 0.001
14 HbO No − 396.43 32.47  < 0.001 6.40 0.269
Yes − 399.21 53.79  < 0.001
HbR No − 393.23 38.50  < 0.001 32.32  < 0.001
Yes − 383.04 86.11  < 0.001
  1. The following models were compared: 1 + (1 | ID) + (0 + Short | ID) vs 1 + Session + (1 | ID) + (0 + Short | ID), 1 + Group + (1 | ID) + (0 + Short | ID) vs 1 + Group + Group: Session + (1 | ID) + (0 + Short | ID), 1 + Session + (1 | ID) + (0 + Short | ID) vs 1 + Group + Group: Session + (1 | ID) + (0 + Short | ID). For models without and with individual differences, the number parameters were 8 and 13, and degrees of freedom were 4 and 8, respectively. Degrees of freedom for comparison between models were 5