Milestoneunknown· 12mo–17mo

Can the child hold him/herself in a sitting...

Can the child hold him/herself in a sitting position without help or support for longer than a few seconds?

Unknown

What the research says

Framework evidence being indexed.

Full quotes, source languages, and document links coming soon as we finish the source-evidence indexing pass.

Normative evidence

1 source back this milestone. The bars below show the age range each source covers.

This milestone12mo–17moCREDI0mo–3y012243648607284months
Milestone windowNormative study
The coral bar shows this milestone's typical age window. The bars below show the age coverage of each backing source.
CREDI →

What mastery looks like

Not yet

Cannot yet can the child hold him/herself in a sitting position without help or support for longer than a few seconds?

  • No observable behavior matching this item
Emerging

Beginning to show can the child hold him/herself in a sitting position without help or support for longer than a few seconds? with direct support

  • Requires prompting or physical assistance
Developing

Demonstrates can the child hold him/herself in a sitting position without help or support for longer than a few seconds? inconsistently

  • Performs with mild support
  • Inconsistent across contexts
Secure

Consistently passes item across contexts

  • Reliably demonstrates without prompting
Reflexive

Masters item; demonstrates generalization

  • Applies skill spontaneously in novel situations

Activities for this (1)

physical4mo–18mo

Tummy Time and Moving

Parent places child on the floor and observes early floor mobility milestones — rolling, prone lifting, sitting balance, and crawling. Covers six foundational motor milestones at 12-17mo. Three phases: back-to-tummy roll, prone prop-up, and sitting while playing.

Formal assessments

No matching assessment items indexed yet.