What Is PECS?

The Picture Exchange Communication System (PECS) is a structured communication approach designed to help individuals with limited or no verbal communication express their wants, needs, and thoughts. PECS uses visual symbols, most often laminated pictures or icons, to teach children how to initiate communication independently. It is widely used within Applied Behavior Analysis (ABA) therapy, classrooms, and home settings for children with autism spectrum disorder (ASD).

PECS is not simply a visual aid. It is a systematic teaching method with clearly defined steps that focus on functional communication and social interaction. Rather than waiting for a question or prompt, children learn to start the communication themselves. This emphasis on initiation is one of the reasons PECS is often effective for children who struggle with expressive language or experience frustration related to communication breakdowns.

Who Is PECS For?

PECS is commonly used with children who have significant communication challenges, but it can support a wide range of learners. It may be appropriate for:

Non-verbal children or those who use very few spoken words Children with delayed speech or limited expressive language Children who rely heavily on gestures, pulling adults, or problem behaviors to communicate Individuals who learn best through visual supports Early learners who are still developing foundational communication skills

PECS can be used as a primary communication system or as a bridge toward spoken language or other augmentative and alternative communication (AAC) tools, depending on the child’s progress and needs.

The Origins of PECS

PECS was developed in 1985 by Dr. Andrew Bondy and Lori Frost at the Delaware Autism Program. Their work focused on addressing a common challenge seen in many children with autism: the ability to communicate wants and needs spontaneously. Traditional approaches often relied on prompts or questions, which did not always lead to independent communication.

Bondy and Frost designed PECS to teach children that communication has power and purpose. By exchanging a picture for a desired item, children quickly learn that their actions can influence their environment. Over time, PECS became widely adopted in early intervention programs, schools, and therapy settings and remains one of the most recognized communication systems used in autism treatment today.

How PECS Works

PECS is taught through a structured six-phase progression. Each phase builds on the previous one, helping children move from simple requesting to more complex communication skills.

Phase 1: Learning How to Communicate

In the first phase, the child learns to exchange a single picture for a highly preferred item or activity. For example, the child hands a picture of a snack to an adult and immediately receives the snack. The focus is on teaching the child that communication leads to meaningful outcomes.

Phase 2: Distance and Persistence

The child learns to carry their communication book and seek out a communication partner across different settings. This may include walking across the room or approaching a different adult. The goal is to encourage persistence and independence rather than relying on proximity or prompts.

Phase 3: Picture Discrimination

At this stage, the child learns to choose between multiple pictures. For example, if both a ball and a juice picture are available, the child selects the picture that matches what they want. This phase strengthens understanding, choice-making, and visual discrimination skills.

Phase 4: Sentence Structure

Children begin to build simple sentences using a sentence strip, often starting with “I want” followed by the picture of the desired item. This phase introduces early sentence structure and supports more complex communication.

Phase 5: Answering Questions

The child learns to respond to the question “What do you want?” using their sentence strip. This phase adds a conversational element while still reinforcing independent communication.

Phase 6: Commenting and Expanding Language

In the final phase, children use PECS to comment on their environment. They may say things like “I see car” or “I hear music.” Communication expands beyond requesting and supports shared attention and social engagement.

Real-Life Example of PECS in Daily Use

Consider a preschool-aged child named Mateo who is non-verbal and often becomes upset when others do not understand him. At home, Mateo pulls his parents toward the kitchen and cries when he wants a snack. During therapy, PECS is introduced using pictures of his favorite foods.

Within a short period, Mateo learns to hand over a picture of crackers to receive them. As he progresses, he begins using a sentence strip to say “I want crackers.” At school, he uses the same system to request toys and activities. Over time, Mateo becomes less frustrated, engages more with peers, and begins attempting verbal sounds alongside his picture exchanges.

Benefits of Using PECS

PECS offers several meaningful benefits for children with autism, including:

Encouraging independent communication Reducing frustration and challenging behaviors Supporting early language and social development Promoting initiation rather than passive responding Improving interactions across home, school, and therapy environments Providing a clear, consistent communication framework

Is PECS Evidence-Based?

PECS is considered an evidence-based practice. Research has consistently shown that it supports functional communication, reduces problem behaviors linked to communication difficulties, and can lead to improvements in speech for some children. While not every child transitions to verbal language, many develop stronger communication skills and social engagement through PECS.

PECS Compared to Other Communication Systems

PECS differs from other communication approaches in several important ways. It emphasizes initiation rather than response, does not require speech or advanced motor skills to begin, and can be used by very young children. In some cases, children transition from PECS to speech-generating devices or other AAC systems as their skills develop.

The most appropriate communication system depends on the child’s abilities, preferences, and long-term goals. Collaboration between BCBAs, speech-language pathologists, and families helps ensure the right support is chosen.

Using PECS at Home

PECS can and should be used at home to support consistency and generalization. Parents may incorporate PECS during meals, playtime, routines, and transitions. Proper training from a qualified professional is important so caregivers know how to respond consistently and reinforce communication attempts appropriately.

When PECS is used across environments, children are more likely to maintain their skills and use them meaningfully in everyday life.

Common Mistakes to Avoid When Using PECS

Even when families and educators have the best intentions, PECS can be less effective if it is not implemented correctly. One common mistake is over-prompting, where adults guide the child too much instead of allowing them to initiate communication independently. Another issue is limiting access to the PECS book, which can unintentionally teach the child that communication is only allowed at certain times. Moving through the phases too quickly without mastery can also weaken long-term outcomes. PECS works best when it is used consistently, follows the structured phases, and allows the child to take the lead whenever possible.

How PECS Fits Into ABA Therapy

PECS is often embedded directly into ABA treatment plans. Behavior analysts use data collection to track how often a child initiates communication, what they request, and how independently they use the system. Goals are written to reflect progress through PECS phases, generalization across environments, and reduction of problem behaviors linked to communication frustration. PECS is frequently paired with reinforcement strategies and skill-building programs to support language, social interaction, and independence.

PECS and Behavior Reduction

Many challenging behaviors occur because a child cannot effectively communicate their needs. PECS provides a functional alternative to behaviors such as crying, hitting, or dropping to the floor. When children learn that exchanging a picture gets faster and more predictable results than problem behavior, those behaviors often decrease naturally. This makes PECS a powerful tool not only for communication, but also for improving overall behavior and emotional regulation.

Using PECS Across Environments

For PECS to be most effective, it should be used consistently across settings. At home, children may use PECS to request snacks, toys, or help. At school, they might request materials, breaks, or activities. In the community, PECS can support communication during shopping trips, playground visits, or appointments. Using the same symbols and expectations across environments helps children generalize their skills and communicate more confidently.

Frequently Asked Questions About PECS

Does PECS prevent a child from learning to talk?

Research does not support the idea that PECS delays speech. In many cases, PECS reduces pressure and frustration, which can actually support verbal language development. Some children begin using spoken words alongside pictures as communication becomes more successful.

How long does a child typically use PECS?

There is no fixed timeline. Some children use PECS for a short period before transitioning to speech or another AAC system, while others rely on it long term. Progress depends on individual learning profiles and communication goals.

How do I know if my child is ready to move beyond PECS?

Readiness is determined by skill mastery, not age. A BCBA or speech-language pathologist can assess whether a child is consistently initiating communication, discriminating symbols, and combining symbols before recommending transitions.

Can older children use PECS?

Yes. While PECS is often introduced in early childhood, it can be adapted for older children and more complex social environments by expanding vocabulary and sentence structures.

Supporting Communication Growth with PECS

PECS offers children with autism a dependable way to express themselves, reduce frustration, and build meaningful connections. Whether used as a bridge to spoken language or as a long-term communication system, PECS supports independence, confidence, and participation across daily life.