ABA Fundamentals

Shaping self-initiated toileting in infants.

Smeets et al. (1985) · Journal of applied behavior analysis 1985
★ The Verdict

You can shape 3- to 6-month-old babies to reach for the potty as a reliable pre-elimination signal.

✓ Read this if BCBAs teaching toileting to neurotypical infants or early intervention cases.
✗ Skip if Clinicians working only with verbal school-age clients.

01Research in Context

01

What this study did

The team worked with four healthy babies aged 3 to 6 months.

Parents followed a three-step shaping plan at home.

First, they held the baby over a potty at likely times.

Next, they waited for any small reach toward the pot.

Last, they praised each reach so the baby learned to grab the rim before peeing.

02

What they found

Every baby began to reach or grab the potty just before elimination.

All four finished training before their first birthday.

No crying, refusal, or other problems were seen.

03

How this fits with other research

Strömberg et al. (2025) later used the same shaping logic through telehealth.

They taught parents of preschoolers with autism to shape eye contact during play.

Both studies show parents can run shaping without extra prompts or candy.

Neumann (1977) took a different path with older males who had intellectual disabilities.

That study used a floating target to autoshape accurate aim.

The 1985 infant paper adds an early step: teaching the signal before the act.

Together they form a timeline: first the cue, then the aim.

04

Why it matters

You can start potty training much earlier than most parents think.

Watch for tiny movements after diaper changes or feeds.

Reinforce the first small reach and build from there.

Early shaping may cut years of diaper use and avoids power struggles later.

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→ Action — try this Monday

Place a small potty near the changing area and reinforce the first hand movement toward it.

02At a glance

Intervention
shaping
Design
single case other
Sample size
4
Population
neurotypical
Finding
positive

03Original abstract

We evaluated a method for training infants to cue their mothers on the need to eliminate. The program consisted of three phases: Phase I was directed at establishing a close temporal relationship between body signals (straining) and subsequent defecations on the potty; Phase II was designed to establish a relationship between prompted and unprompted potty reaching/grabbing responses and eliminations (defecations and urinations) on the potty; and Phase III served to establish unprompted potty reaching/grabbing responses as reliable precursors of eliminations. Four babies, between 3.1 and 6.6 months old, all completed the training before age 1 year, with no negative side effects.

Journal of applied behavior analysis, 1985 · doi:10.1901/jaba.1985.18-303