Milestoneunknown· 2.5y–3y

If you show the child two objects or...

If you show the child two objects or people of different size, can he/she tell you which one is the big one and which is the small one?

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 milestone2.5y–3yCREDI0mo–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 if you show the child two objects or people of different size, can he/she tell you which one is the big one and which is the small one?

  • No observable behavior matching this item
Emerging

Beginning to show if you show the child two objects or people of different size, can he/she tell you which one is the big one and which is the small one? with direct support

  • Requires prompting or physical assistance
Developing

Demonstrates if you show the child two objects or people of different size, can he/she tell you which one is the big one and which is the small one? 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)

Thinking2.2y–3.3y

Think It Through

Parent runs structured play observations targeting shape recognition, spatial reasoning, counting, comparison, block building, peg tasks, rhythm tapping, and mechanical toy operation. Covers twenty cognitive problem-solving milestones at 28-38mo.

Formal assessments

No matching assessment items indexed yet.