| TYPE | STAGE |
| Acculturation Birth to age 2-4: Engages with little consciousness of the environment. |
Absorption: Hears and aurally collects the sounds of music in the environment. |
| Random Response: Moves and babbles in response to, but without relation to, the sounds of music in the environment. | |
| Purposeful Response: Tries to relate movement and babble to the sounds of music in the environment. |

