[Retracted] Optimization of Online Teaching Quality Evaluation Model Based on Hierarchical PSO-BP Neural Network

Table 4

KMO judgment criteria.

KMO statistic value	Discrimination note	Factor analysis applicability
Above 0.95	Ideal for factor analysis	Great
0.85 or more	Suitable for factor analysis	Good
0.75 or more	Factor analysis	Moderate
0.65 or more	Can barely perform factor analysis	Normal
0.55 or more	Not suitable for factor analysis	Poor
0.55 or less	Very unsuitable for factor analysis	Unacceptable