Table 3: Full fine-tuning results of EEG datasets. A two-layer fully connected networks classifier  $P$  is trained on top of pre-trained encoder  $G$  on EEG datasets AD and TDBRAIN. Fine-tuning the whole network includes  $G$  and  $P$  . We use  ${100}\% ,{10}\%$  ,and  $1\%$  of labeled training data in AD and TDBRAIN.
Datasets	Fraction	Models	Accuracy	Precision	Recall	F1 score	AUROC	AUPRC
AD	100%	TS2vec	81.26±2.08	81.21±2.14	81.34±2.04	81.12±2.06	89.20±1.76	88.94±1.85
TF-C	75.31±8.27	75.87±8.73	74.83±8.98	74.54±8.85	79.45±10.23	79.33±10.57
Mixing-up	65.68±7.89	72.61±4.21	68.25±6.97	63.98±9.92	84.63±5.04	83.46±5.48
TS-TCC	73.55±10.00	77.22±6.13	73.83±9.65	71.86±11.59	86.17±5.11	85.73±5.11
SimCLR	54.77±1.97	50.15±7.02	50.58±1.92	43.18±4.27	50.15±7.02	50.42±1.06
CLOCS	78.37±6.00	83.99±2.11	76.14±7.03	75.78±7.93	91.17±2.51	90.72±3.05
COMET (Ours)	84.50±4.46	88.31±2.42	82.95±5.39	83.33±5.15	94.44±2.37	94.43±2.48
10%	TS2vec	73.28±4.34	74.14±4.33	73.52±3.77	73.00±4.18	81.66±5.20	81.58±5.11
TF-C	75.66±11.21	75.48±11.48	75.58±11.59	75.38±11.47	81.38±14.19	81.56±13.68
Mixing-up	59.38±3.33	64.85±4.38	61.94±3.42	58.17±3.41	75.02±6.14	73.44±5.82
TS-TCC	77.83±6.90	79.73±7.49	76.18±7.21	76.43±7.56	84.12±7.32	84.12±7.61
SimCLR	56.09±2.25	53.81±5.74	51.73±2.59	44.10±4.84	53.81±5.74	51.08±1.53
CLOCS	76.97±3.01	81.70±3.21	74.69±3.26	74.75±3.61	86.91±3.61	86.70±3.64
COMET (Ours)	91.43±3.12	92.52±2.36	90.71±3.56	91.14±3.31	96.44±2.84	96.48±2.82
1%	TS2vec	64.93±3.53	65.28±3.52	65.14±3.59	64.64±3.58	70.56±5.38	68.97±5.75
TF-C	75.66±12.61	75.26±13.91	74.77±13.64	74.33±14.45	78.96±16.17	81.89±12.50
Mixing-up	63.67±1.20	65.02±2.09	64.64±1.63	63.55±1.21	71.95±3.39	70.15±3.70
TS-TCC	53.04±8.80	52.39±13.73	52.00±8.01	44.69±12.24	48.89±10.59	51.41±7.81
SimCLR	55.42±2.43	52.18±5.55	51.37±2.76	45.02±4.79	52.18±5.55	50.87±1.45
CLOCS	64.50±4.16	65.17±4.72	63.73±4.86	63.01±5.11	69.16±6.75	68.15±7.20
COMET (Ours)	88.22±3.36	88.55±2.73	88.56±3.14	88.14±3.37	96.05±1.36	96.12±1.31
TDBrain	100%	TS2vec	80.21±1.69	81.38±1.97	80.21±1.69	80.07±1.69	89.57±2.31	89.60±2.37
TF-C	66.62±1.76	67.15±1.64	66.62±1.76	66.35±1.91	65.43±6.13	66.18±4.90
Mixing-up	81.47±1.07	82.11±1.12	81.47±1.07	81.38±1.08	90.48±0.89	90.51±0.94
TS-TCC	77.42±2.86	77.68±2.93	77.42±2.86	77.37±2.86	87.37±3.06	87.61±3.22
SimCLR	58.43±1.77	59.48±1.95	58.43±1.77	57.30±2.07	59.48±1.95	55.05±1.18
CLOCS	78.16±1.13	79.49±1.61	78.16±1.13	77.91±1.12	88.49±1.95	88.83±1.94
COMET (Ours)	85.47±1.16	85.68±1.20	85.47±1.16	85.45±1.16	93.73±1.02	93.96±0.99
10%	TS2vec	72.39±1.13	74.49±1.73	72.39±1.13	71.80±1.05	80.71±1.90	80.06±1.87
TF-C	59.14±3.04	59.34±3.19	59.14±3.04	58.98±2.94	59.56±4.10	59.65±2.99
Mixing-up	77.50±2.07	80.09±1.92	77.50±2.07	76.99±2.28	87.29±1.34	87.13±1.37
TS-TCC	71.23±1.57	78.78±0.66	71.23±1.57	69.18±2.25	80.56±1.98	80.21±2.21
SimCLR	59.79±2.09	60.50±1.90	59.79±2.09	59.06±2.82	60.50±1.90	55.96±1.41
CLOCS	75.04±2.65	75.97±2.86	75.04±2.65	74.83±2.66	84.25±3.27	84.37±3.52
COMET (Ours)	79.28±4.64	79.83±4.83	79.28±4.64	79.19±4.62	88.39±4.13	88.38±3.96
1%	TS2vec	58.16±2.30	58.47±2.48	58.16±2.30	57.83±2.19	61.26±2.51	60.95±2.48
TF-C	53.16±2.11	53.19±2.10	53.16±2.11	52.99±2.18	52.11±2.95	59.11±1.88
Mixing-up	63.91±2.39	64.29±2.57	63.91±2.39	63.70±2.30	69.61±3.64	68.89±4.07
TS-TCC	49.14±1.88	51.10±8.54	49.14±1.88	40.82±4.17	48.05±4.28	50.17±3.94
SimCLR	59.46±1.79	59.77±1.87	59.46±1.79	59.16±1.81	59.77±1.87	55.69±1.27
CLOCS	58.85±4.93	59.03±5.00	58.85±4.93	58.38±5.45	62.57±6.38	62.14±6.34
COMET (Ours)	72.93±7.21	74.20±7.68	72.93±7.21	72.57±7.37	78.72±8.42	77.71±9.10