| Author | Emotion classes | Participants | Male | Female | Mean age ± SD |
| [114] | Happy, sad, fear, relaxation, disgust, rage | 100 | 57 | 43 | — | [113] | Arousal and valence (4 quadrants) | 60 | 16 | 44 | 28.9 ± 5.44 | [149] | Valence, arousal | 58 (ASCERTAIN) | 37 | 21 | 30 | [107] | Valence, arousal | 58 (ASCERTAIN) | 37 | 21 | 30 | [112] | Valence, arousal (high and low) | 40 | 20 | 20 | 26.13 ± 2.79 | [110] | Negative, positive, and neutral (SEED). Amusement, excitement, happiness, calmness, anger, disgust, fear, sadness, and surprise (DREAMER) | 15 (SEED), 23 (DREAMER) | 21 | 17 | 26.6 ± 2.7 | [115] | Horror = (fear, anxiety, disgust, surprise, tension), empathy = (happiness, sadness, love, being touched, compassion, distressing, disappointment) | 38 | 19 | 19 | — | [100] | Valence, arousal, dominance, liking | 32 (DEAP) | 16 | 16 | 26.9 | [101] | Valence, arousal (high and low) | 32 (DEAP) | 16 | 16 | 26.9 | [102] | Valence, arousal | 32 (DEAP) | 16 | 16 | 26.9 | [103] | — | 32 (DEAP) | 16 | 16 | 26.9 | [104] | Valence, arousal (2 class) | 32 (DEAP) | 16 | 16 | 26.9 | [105] | Valence, arousal, dominance | 32 (DEAP) | 16 | 16 | 26.9 | [114] | Happy, fear, peace, disgust, sadness | 13 (watching video materials), 18 (VR materials) | 13 | 18 | — | [130] | Stress level (low and high) | 28 | 19 | 9 | 27.5 | [98] | Valence, arousal (high and low) | 25 | — | — | — | [120] | Fear | 22 | 14 | 8 | — | [106] | Happy, fear, sad, relax | 20 | — | — | — | [117] | Engagement, enjoyment, boredom, frustration, workload | 20 | 19 | 1 | 15.29 | [109] | Happy, sad, fear, disgust, neutral | 16 | 6 | 10 | 23.27 ± 2.37 | [118] | Anguish, tenderness | 16 | — | — | — | [111] | Positive, neutral, negative | 15 (SEED) | 7 | 8 | — | [99] | Happy, fear, sad, calm | 13 | 8 | 5 | — | [141] | Happy, relaxed, depressed, distressed, fear | 10 | 10 | — | 21 | [119] | Happy, fear | 6 | 5 | 1 | 26.67 ± 1.11 | [92] | Pleasant, happy, frightened, angry | 5 | 4 | 1 | — |
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