Table 1. Interaction types: Parameter interacting and rank of Rδ.
| Type of interaction | structure matrix | Rank |
|---|---|---|
| Type I interaction | Rδ = Rυ ⊗ Rψ = I ⊗ I = I | nT |
| Type II interaction | Rδ = Rυ ⊗ Rγ | n(T − 2) for RW2 |
| Type III interaction | Rδ = Rψ ⊗ Ru | (n − 1)T |
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