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Categories of interactive relationships between two factors.
| Interaction type | Description |
|---|---|
| Weaken, univariate | Min (Q(X1), Q (X2)) < Q (X1 ∩ X2) < Max (Q(X1), Q(X2)) |
| Weakened, nonlinear | Q (X1 ∩ X2) < Min (Q(X1), Q (X2)) |
| Enhanced, bivariate | Q (X1 ∩ X2) > Max (Q (X1), Q (X2)) |
| Enhanced, nonlinear | Q (X1 ∩ X2) > Q (X1) + Q (X2) |
| Independent | Q (X1 ∩ X2) = Q (X1) + Q (X2) |
