Milestoneunknown· 9mo–15mo

Supports the weight of {his/her} upper body with one arm when lying face down

Supports the weight of {his/her} upper body with one arm when lying face down

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 milestone9mo–15moStanford SHQ0mo–6y012243648607284months
Milestone windowNormative study
The coral bar shows this milestone's typical age window. The bars below show the age coverage of each backing source.
Stanford SHQ →

What mastery looks like

Not yet

Shows no attempt to supports the weight of their upper body with one arm when lying face down

  • Shows no attempt to supports the weight of their upper body with one arm when lying face down
  • No observable behavior matching this milestone
Emerging

Occasionally or inconsistently supports the weight of their upper body with one arm when lying face down

  • Occasionally or inconsistently supports the weight of their upper body with one arm when lying face down
  • Requires significant support or prompting
Developing

Frequently supports the weight of their upper body with one arm when lying face down with some support

  • Frequently supports the weight of their upper body with one arm when lying face down with some support
  • Shows the behavior in familiar contexts
Secure

Consistently supports the weight of their upper body with one arm when lying face down across contexts

  • Consistently supports the weight of their upper body with one arm when lying face down across contexts
  • Performs independently without prompting
Reflexive

Readily supports the weight of their upper body with one arm when lying face down and extends the behavior

  • Readily supports the weight of their upper body with one arm when lying face down and extends the behavior
  • Shows flexibility and adaptation in approach

Activities for this (1)

physical8mo–22mo

Up, Down, Around

Parent observes and scaffolds the full floor-to-standing movement sequence: dragging to reach, lying-to-sitting, sitting-to-kneeling, supported standing, standing-to-sitting, standing-to-squatting, cruising, and walking alone. Covers ten gross motor transition milestones at 8-22mo.

Formal assessments

No matching assessment items indexed yet.

Standardised assessment view

1 instrument measure this construct. The construct page shows how each one approaches it and at what age range.

View as assessment construct →