Table 12 Privacy utility balance Analysis.

From: A spatio-temporal graph diffusion and federated contrastive learning framework for cross-institutional educational evaluation

ε

Model accuracy loss

PLR

Adversarial robustness

Federated Aggregation Consistency

σ

Parameter sensitivity

Robustness decay rate

Information entropy

1

5.8 ± 0.4

0.08 ± 0.01

76.2 ± 1.8

88.3 ± 1.2

0.14 ± 0.02

0.78 ± 0.03

12.3 ± 1.2

3.45 ± 0.15

1.5

4.3 ± 0.3

0.12 ± 0.02

82.4 ± 1.5

92.1 ± 0.9

0.17 ± 0.03

0.82 ± 0.04

8.7 ± 0.9

4.12 ± 0.18

2

2.1 ± 0.2

0.18 ± 0.03

79.6 ± 1.8

89.7 ± 1.1

0.21 ± 0.02

0.75 ± 0.05

15.6 ± 1.5

5.03 ± 0.22

2.5

1.5 ± 0.1

0.25 ± 0.04

73.5 ± 2.1

85.4 ± 1.5

0.25 ± 0.03

0.69 ± 0.06

21.4 ± 2.1

5.87 ± 0.25

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