Milestoneunknown· 3y–3.5y

Understands the difference between heavy and light

Understands the difference between heavy and light

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 milestone3y–3.5yStanford 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 understands the difference between heavy and light

  • Shows no attempt to understands the difference between heavy and light
  • No observable behavior matching this milestone
Emerging

Occasionally or inconsistently understands the difference between heavy and light

  • Occasionally or inconsistently understands the difference between heavy and light
  • Requires significant support or prompting
Developing

Frequently understands the difference between heavy and light with some support

  • Frequently understands the difference between heavy and light with some support
  • Shows the behavior in familiar contexts
Secure

Consistently understands the difference between heavy and light across contexts

  • Consistently understands the difference between heavy and light across contexts
  • Performs independently without prompting
Reflexive

Readily understands the difference between heavy and light and extends the behavior

  • Readily understands the difference between heavy and light and extends the behavior
  • Shows flexibility and adaptation in approach

Activities for this (1)

physical2.2y–3.3y

What and Why?

Parent probes receptive vocabulary and comprehension: identifying colors, shapes, object functions, action pictures, comparative adjectives, categories, and responses to logical questions. Covers nineteen language comprehension and conceptual milestones at 28-38mo.

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 →