Table 1.
Selected features at success/failure presentation with prediction accuracies greater than baseline. We measured prediction accuracies for all paired feature combinations. The features that showed higher average prediction, which is averaged through all feature sets including each corresponding feature, than the baseline prediction accuracy (chance level) were listed
| Condition | Result | Number of cooperators/free riders | Max. prediction accuracy (%) | Electrodes combination with maximum prediction accuracy |
|---|---|---|---|---|
| CondS | Success | 19/41 (68.3%a) | 88.8 | C2 + FC3 |
| Failure | 38/136 (78.2%) | 84.4 | FPz + PO4 | |
| CondNF | Success | 47/67 (58.8%) | 78.9 | CP4 + PO3 |
| Failure | 45/75 (62.5%) | 77.5 | CP3 + C3 | |
| CondNG | Success | 187/33 (85%) | 88.5 | M2 + FC3 |
| Failure | 4/10 (71.4%) | 100.0 | Cz + [AF4, C1, C2, C3, C4, C5, CP2, CP3, CP4, CP5, CPz, Cz, F1, F2, F3, F4, F5, F6, F7, F8, FC1, FC2, FC3, FC4, FC5, FC6, FCz, FP2, FT8, Fz, M1, O1, P2, P3, P4, P5, P6, P7, P8, PO3, PO5, PO6, PO7, PO8, POz, Pz, T7, T8, TP8]b |
aThe baseline prediction rate as calculated based on the number of cooperation/free riding behavioral decisions in each condition and result. The more frequent strategy is presented as a proportion in the parentheses. bAny combination of the features from Cz and one of the other features reported within the bracket has the same prediction performance.