| Level 1 (within individual): | Cortisol = β0 + β1Parent + β2Stranger + r |
| Level 2 (between individual) | β0 = γ00 + γ01neglect + U0 |
| β1Parent = γ10 + γ11group + γ12neglect + U1 | |
| β2Stranger = γ20 + U2 |
| Level 1 (within individual): | Cortisol = β0 + β1Parent + β2Stranger + r |
| Level 2 (between individual) | β0 = γ00 + γ01neglect + U0 |
| β1Parent = γ10 + γ11group + γ12neglect + U1 | |
| β2Stranger = γ20 + U2 |