In the model (7.39), the correlation coefficient between two observations Xi j , Xik belonging to the same class, the so-called intraclass correlation coefficient,

In the model (7.39), the correlation coefficient ρ between two observations Xi j , Xik belonging to the same class, the so-called intraclass correlation coefficient, is given by ρ = σ2 A/(σ2 A + σ2).

Section 7.8