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Interpretable Self-Supervised Facial Micro-Expression Learning to Predict Cognitive State and Neurological Disorders

AAAI 2021 · Label-efficient and robust learning › Self-supervised and contrastive · approach: Self-supervised neuroimaging representations · 15 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use self-supervised pretraining before downstream classificationCNN-A with 3FC · AWS stuttering disfluency, 10% training dataaccuracy: 65.50±2.09 -> 71.75±3.92Helped
Use self-supervised pretraining before downstream classificationCNN-A with 3FC · AWS stuttering disfluency, 100% training dataaccuracy: 72.76±1.38 -> 75.27±1.11Helped
Reduce the range of signal-transformation factors (ablation)Self-supervised CNN models · AWS stuttering disfluency, across training data amountsaccuracy change: Table 3 reports ∼1.9% to ∼8.2% degradation in most settingsHurt
Reduce the range of signal-transformation factors (ablation)CNN-A RF · AWS stuttering disfluency, 50% training dataaccuracy change: ∼-0.8%Helped
Increase embedding dimensions from 256 to 970 (ablation)CNN-B and CNN-C with 3FC · AWS stuttering disfluency, 100% and 50% training dataaccuracy change: ∼-3.7%, ∼-0.9%, ∼-4.8%, ∼-4.5%Hurt
Increase embedding dimensions from 256 to 970 (ablation)CNN-C RF · AWS stuttering disfluency, 10% training dataaccuracy change: ∼11.0%Helped
Increase embedding dimensions from 256 to 970 (ablation)CNN-B and CNN-C downstream classifiers · AWS stuttering disfluency, across training data amountsaccuracy change: Table 4 reports changes from ∼-4.8% to ∼11.0%Mixed

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