object permanence
Techniques to develop object permanence
Object permanence is built through graded hide-and-find play — moving from partially hidden to fully concealed objects, then to delayed and multi-location searches — using salient, motivating targets, errorless hiding and social routines like peek-a-boo. Techniques are matched to developmental level. A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre under qualified clinician care.
Out of sight need not mean out of mind — with the right graded play, a child learns that the world holds steady even when it disappears.
In short
Object permanence — knowing an object still exists when it cannot be seen — is built through graded hide-and-find play, progressing from partially hidden objects to fully concealed ones, then to multi-step and delayed searches. The therapeutic principle is simple: make the hidden object salient, predictable and rewarding to recover, then systematically reduce visual and temporal cues so the child holds the object in mind for longer. Most children consolidate this between roughly 8–12 months, so techniques are matched to current functioning rather than chronological age.The techniques that help
- Partial-to-full occlusion grading — begin with a desired toy half-covered by a cloth, prompt the reach, then progress to full covering. Reduce prompting as the child initiates the search.
- Errorless hiding — hide consistently in one location first, reinforcing every successful retrieval, before introducing A-not-B reversals and multiple locations to challenge working memory.
- Salient, motivating targets — use noisy, lit or favourite objects so the auditory/visual trace sustains the mental representation while sight is removed.
- Peek-a-boo and social routines — face-disappearance games scaffold the same concept with strong affective reward and joint attention.
- Delay manipulation — gradually lengthen the interval between hiding and searching to strengthen representational memory.
- Containers and posting toys — putting objects in and out of opaque boxes embeds the concept in functional, repeatable play.
Embed practice in natural routines and pair with naming ("where's it gone?") to link the skill to early language and cause-and-effect.
The science
Object permanence reflects emerging representational memory and is a foundation for symbolic play, joint attention and early language. Graded, reinforced search tasks operationalise this within a play-based developmental frame.The Pinnacle way
A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care — never from an app or form. Our therapists profile cognitive-play skills precisely (see the AbilityScore®) and embed targets in occupational therapy and play-based sessions. Learn more about object permanence.Trusted sources
WHO ICF (d1, Learning and applying knowledge); American Academy of Pediatrics (HealthyChildren.org) early cognitive milestones; ASHA guidance on play and early communication.Next step — Want a tailored cognitive-play plan? Partner with a Pinnacle clinician.
This is general information, not a diagnosis — a clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre under qualified clinician care.
What to watch
Watch whether the child searches for a fully hidden object, tolerates lengthening delays before retrieval, generalises searching across locations, and pairs the skill with naming and joint attention; persistent absence of search beyond 12 months warrants a developmental review.
Try this at home
Play peek-a-boo and hide a favourite noisy toy under a cloth, then prompt your child to pull it off — celebrate every find, then make the hiding a little harder each week.
Trusted sources
Developed by SETU Consortium · Pinnacle Blooms Network · Last reviewed 2026-06-10 · reviewed every 540 days
This is general information, not a diagnosis. A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care.
Frequently asked
At what age does object permanence typically develop?
Most children consolidate object permanence between roughly 8 and 12 months, with early signs of searching for partially hidden objects appearing a little earlier. Because development varies, techniques should be matched to the child's current functioning rather than chronological age alone.
What is the A-not-B error and why does it matter in therapy?
The A-not-B error is when a child continues to search in a previously rewarded location (A) even after watching an object hidden in a new location (B). Working through these reversals strengthens working memory and is a useful graded challenge once errorless single-location searching is secure.
How does object permanence link to later skills?
It underpins representational memory, which supports symbolic play, cause-and-effect understanding and early language. Pairing search games with naming helps bridge the skill into communication.