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Birth–11 monthsBuilding Relationships

Recognises and is most responsive to main carer’s voice: face brightens, activity increases when familiar carer appears.

Observe whether the child: recognises and is most responsive to main carer’s voice: face brightens, activity increases when familiar carer appears.

What it looks like

Three ways this behaviour shows up as a child grows. Each level includes everyday moments to watch for.

Emerging

Just starting

The child sometimes becomes more alert to the main carer’s voice, but responses are inconsistent and may depend on the child’s state (tired/hungry).

What you might see

  • When the main carer speaks from nearby (without touching), the child shows no clear facial brightening or increase in movement within 5 seconds.
  • The child responds similarly (or not at all) to a familiar carer and an unfamiliar adult voice in the same setting.
  • When the main carer enters the room, the child does not orient their head/eyes toward the carer.
  • The child briefly stills or looks toward the sound of the main carer’s voice, but does not consistently brighten or become more active.
  • A small smile or arm/leg movement occurs once or twice to the main carer’s voice, but is not repeatable across moments.
  • The child responds strongly only when the carer is very close or uses a highly excited voice.

Expected

On track

The child shows a clear, repeatable preference response to the main carer’s voice (eyes/face brighten, movement increases) in familiar routines.

What you might see

  • When the main carer speaks, the child’s eyes widen/face brightens and they become more active (kicking, waving arms).
  • The child turns their head/eyes toward the main carer’s voice when the carer speaks from just out of view.
  • When the main carer appears, the child smiles or vocalizes and increases movement compared with baseline.

Exceeding

Going further

The child consistently shows strongest positive response to the main carer’s voice and presence (bright face, excited movement, vocalizing/reaching).

What you might see

  • The child visibly brightens quickly to the main carer’s voice (big smile or excited alert face) across different times of day.
  • The child reaches up/leans toward the main carer when hearing their voice or seeing them enter.
  • The child vocalizes in response to the main carer’s voice and sustains engagement (keeps looking/turning toward the carer).
  • Hearing the main carer’s voice, the child actively searches (turns head, looks around) until locating the carer.
  • The child responds to the main carer’s voice with a clear bid (vocalizes, reaches, crawls) rather than only showing passive excitement.
  • When a second familiar adult speaks, the child can still engage, but shows a distinct strongest brightening response to the main carer.

Try this at home

Small everyday moments where you can notice this behaviour without setting up anything special.

  • From just outside your baby’s view (e.g., behind a door), say their name in your normal voice and notice whether they orient toward you and brighten.

  • When your baby is playing, speak without touching and observe whether their activity increases (kicks/waves) and whether they try to find you.

  • After a short separation, enter the room and say hello; notice whether your baby’s face brightens and they reach/lean toward you.

  • Ask another familiar adult to speak in a similar tone; observe whether your baby shows a stronger response to the main carer.

  • During bedtime or a soothing routine, speak softly and notice whether your baby settles more readily to your voice than to other sounds.

Connected behaviours

Behaviours that scaffold, follow, or co-emerge with this one.

Where this comes from

The framework source and supporting developmental research.

Framework source

  • Development Matters in the EYFS (2012), Personal, Social and Emotional Development: Making relationships (birth–11 months).

    The framework specifies observable preferential responsiveness to a main carer as an early relationship marker.

Developmental research

  • DeCasper & Fifer (1980), Of human bonding: newborns prefer their mothers' voices (Science).

    Early auditory preference findings support the measurability of differential infant responsiveness to the primary caregiver’s voice.

Five-level rubric (detailed)Show

The full progression underlying the three levels above. Used by the platform’s reasoning agent when planning activities and observations.

Not Yet
The child shows little consistent difference in response to the main carer’s voice compared with other voices, and face-brightening/activity increase is not reliably observed.
  • When the main carer speaks from nearby (without touching), the child shows no clear facial brightening or increase in movement within 5 seconds.
  • The child responds similarly (or not at all) to a familiar carer and an unfamiliar adult voice in the same setting.
  • When the main carer enters the room, the child does not orient their head/eyes toward the carer.
Emerging
The child sometimes becomes more alert to the main carer’s voice, but responses are inconsistent and may depend on the child’s state (tired/hungry).
  • The child briefly stills or looks toward the sound of the main carer’s voice, but does not consistently brighten or become more active.
  • A small smile or arm/leg movement occurs once or twice to the main carer’s voice, but is not repeatable across moments.
  • The child responds strongly only when the carer is very close or uses a highly excited voice.
Developing
The child shows a clear, repeatable preference response to the main carer’s voice (eyes/face brighten, movement increases) in familiar routines.
  • When the main carer speaks, the child’s eyes widen/face brightens and they become more active (kicking, waving arms).
  • The child turns their head/eyes toward the main carer’s voice when the carer speaks from just out of view.
  • When the main carer appears, the child smiles or vocalizes and increases movement compared with baseline.
Secure
The child consistently shows strongest positive response to the main carer’s voice and presence (bright face, excited movement, vocalizing/reaching).
  • The child visibly brightens quickly to the main carer’s voice (big smile or excited alert face) across different times of day.
  • The child reaches up/leans toward the main carer when hearing their voice or seeing them enter.
  • The child vocalizes in response to the main carer’s voice and sustains engagement (keeps looking/turning toward the carer).
Reflexive
The child uses the main carer’s voice as a reliable cue (searches/orients, anticipates interaction), while also tolerating and engaging with other trusted adults.
  • Hearing the main carer’s voice, the child actively searches (turns head, looks around) until locating the carer.
  • The child responds to the main carer’s voice with a clear bid (vocalizes, reaches, crawls) rather than only showing passive excitement.
  • When a second familiar adult speaks, the child can still engage, but shows a distinct strongest brightening response to the main carer.