{
  "experiment": "TSFA-SPR: Temporal-Shared-Private Representation",
  "seed": 42,
  "folds": 5,
  "grouped_by": "video_id/group_id",
  "grid_size": 50,
  "feature_dimensions": {
    "text": 768,
    "audio": 25,
    "vision": 192
  },
  "common_dim": 128,
  "shared_dim": 64,
  "private_dim": 64,
  "batch_size": 8,
  "epochs": 40,
  "learning_rate": 0.001,
  "temperature": 0.1,
  "orthogonality_weight": 0.1,
  "reconstruction_weight": 1.0,
  "contrastive_pairs": [
    [
      "text",
      "audio"
    ],
    [
      "text",
      "vision"
    ],
    [
      "audio",
      "vision"
    ]
  ],
  "hard_negative_offsets": [
    -5,
    -3,
    -2,
    2,
    3,
    5
  ],
  "loss_variants": {
    "SP-noOrth-noRec": [
      true,
      false,
      false
    ],
    "SP+Orth": [
      true,
      true,
      false
    ],
    "SPR": [
      true,
      true,
      true
    ],
    "SPR-noSharedContrastive": [
      false,
      true,
      true
    ]
  },
  "emotion_probe": {
    "classification": "StandardScaler + LogisticRegression(C=0.05, max_iter=5000)",
    "regression": "StandardScaler + Ridge(alpha=25), clipped to [-3, 3]",
    "temporal_pooling": "50 slots to five consecutive 10-slot mean bins",
    "all_scalers_fit_on_training_fold_only": true
  },
  "dimension_controls": {
    "SPR_main": "unfused shared 3x64 plus private 3x64 = 384 per slot; 1920 after five-bin pooling",
    "SPR_dim_matched": "mean fused shared 64 plus all private 3x64 = 256 per slot; 1280 after pooling",
    "RawPrivate_PCA": "train-fold PCA from raw private 985-d slot vectors to 256 per slot; 1280 after pooling if 256 components"
  },
  "emotion_labels_used_in_factorizer_training": false,
  "frozen_m4_temporal_branch": true,
  "explicit_time_code_or_slot_index_in_shared_encoder": false,
  "bootstrap_repeats": 2000
}