Is PECS backed by research evidence?

When your child hands you a little picture to ask for a biscuit instead of crying — that small, mighty exchange is the heart of PECS, and it rests on a genuine body of research.

In short

Yes — the Picture Exchange Communication System (PECS) is one of the better-studied picture-based communication approaches for children who are not yet speaking or who have limited spoken language. Research, including controlled trials and several systematic reviews, shows PECS can help many autistic children and others with communication differences learn to request and communicate intentionally, and that it does not stop speech from developing — in some children it sits alongside emerging words. As with any approach, results vary from child to child, which is why an individualised plan matters more than any single method.

What the evidence actually says

PECS teaches a child to start communicating by handing a picture card to another person to get something they want — building, step by step, from a single exchange to short sentences and commenting. The research picture is encouraging:

• Controlled studies show that many children acquire requesting (asking) skills reliably with PECS, often within a structured teaching sequence.
• Systematic reviews classify PECS among the evidence-based and emerging-evidence practices for autism communication, particularly for teaching functional requesting.
• A common parent worry — will pictures hold back talking? — is reassuringly answered: the evidence does not show PECS suppressing speech. For some children, spoken words emerge as communication becomes less frustrating.

What the evidence is less certain about is long-term, complex conversational language and how well skills carry across every setting — gains are strongest for requesting and need deliberate practice across home, centre and community to generalise. So PECS is best seen as one well-supported tool within a broader, child-led communication plan, not a standalone cure.

When it tends to suit a child

PECS is often considered for a child who has clear wants but few or no reliable words, who is not yet pointing or gesturing to communicate, or who becomes frustrated because they cannot make themselves understood. A speech-language therapist looks at the whole child — motivation, motor skills, current communication and family routines — before recommending PECS, another augmentative approach, or a blend.

The Pinnacle way

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, never from an app or form. Our speech therapy team weighs PECS against your child's strengths and goals, then weaves the right communication supports into everyday play and routines so skills carry from card to conversation. Start by exploring how we understand your child's communication profile.

Trusted sources

ASHA on augmentative and alternative communication and evidence-based practice; the American Academy of Pediatrics and HealthyChildren on supporting communication in autistic children; Cochrane reviews on communication interventions.

Next step — If your child has plenty to say but few words to say it with, book a communication screen and let our speech-language team show you whether PECS could open the door.