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PECS for Children with Autism

What is it?
A picture exchange communication system (PECS) is a form of augmentative and alternative communication (AAC) that uses pictures instead of words to help children communicate. PECS was designed especially for children with autism who have delays in speech development.

When first learning to use PECS, the child is given a set of pictures of favorite foods or toys. When the child wants one of these items, he gives the picture to a communication partner (a parent, therapist, caregiver, or even another child). The communication partner then hands the child the food or toy. This exchange reinforces communication.

PECS can also be used to make comments about things seen or heard in the environment. For example, a child might see an airplane overhead, and hand a picture of an airplane to his or her parent. As the child begins to understand the usefulness of communication, the hope is that he will then begin to use natural speech.

What's it like?
A child can be trained in PECS by a parent, caregiver, or therapist who has learned about the method. An applied behavior analysis (ABA) approach is used, in which prompts are given to guide the picture exchange. Further, in the early phases of PECS training, the child chooses a picture of a desired food, and receives the food in exchange for the picture. Getting the food is the positive reinforcement for using the picture to communicate.

PECS is usually taught in six phases:

  1. The communication partner makes a list of the child's favorite items (usually beginning with foods). One of these items is selected for the first training session, and a picture of the item is made. That item can be placed under a clear container, so the child can see it, but not get it. If the child looks interested in the item, the communication partner gives the child the picture card. Then the child is prompted (usually by holding his/her hand and guiding it) to hand the picture card back to the communication partner. Once the communication partner receives the card, the request is spoken aloud ("Oh, you want the cookie! You can have it!"). At this point, the requested item (which has become the reinforcer) is given to the child.
  2. The communication partner moves slightly away from the child so that the child has to move towards the communication partner to place the picture card in his/her hand.
  3. The child is given more than one picture card. Now the child must choose which one represents a desired object, and then give this card to the communication partner. At this point, the child may be using a communication board or a binder in which to hold the cards.
  4. The child is given a card with the phrase "I want ____" on it. This card now must be used with the picture card showing what is desired. The idea is that the child will learn how to communicate using complete sentences. Even children who cannot yet read can learn to recognize the words as symbols on the cards.
  5. Before this point, the child has never been asked directly, "What do you want?" In this phase, the communication partner asks the child this direct question, and waits for the child to hand him/her a picture card. This builds the foundation for future communication when a parent needs to know the desires of his or her child.
  6. Once the child can use PECS with fluency and has generalized the system to more than one communication partner, the child is taught how to comment on something s/he observes. The communication partner holds up an interesting object, asking the child, "What do you see?" at the same time pointing out the "I see ____" card. The child is then prompted to place the picture card representing the object next to the "I see ____" card. The parent then comments on the cards ("Yes! I see the airplane too"). In this way, the child learns how to communicate his or her observations and experiences to others.

What is the theory behind it?
The direct reinforcement that comes from immediately getting what you want is the key to PECS. Without having to use spoken words, a child is able to turn an inner desire into an external reward. It is thought that tangible rewards are more reinforcing to children with autism than social rewards, at least during the first steps of communication learning. However, if these rewards are too difficult to receive - that is, if it is very difficult for the child to form words - then the point of communication may, at first, be lost on these children. This can result in tantrums and other undesirable behavior, because the child cannot clearly communicate what s/he wants. However, when children with autism are trained in PECS, problem behaviors often subside as the benefits of communication become more tangible.

PECS may also help improve social interactions in children with autism. Because the child is in charge of approaching the communication partner, the child learns how to make the first move. For children with autism, approaching another person socially can be difficult. However, in this case, the child is not expected to speak, so the initial approach may be less intimidating.

Does it work?
There are several well-designed research studies showing the usefulness of PECS. In one study of 18 preschool children with language delays, some of whom were diagnosed with autism, PECS generalized across communication partners and environments. These children were able to use PECS to communicate throughout their school days, not just during the training sessions. Further, almost half of these children stopped using PECS and started using natural speech within a year. One parent commented that "PECS turned on the light for communication" in her child. Similar results were found for two smaller, but still well-designed studies.

A larger study of school-aged children found significantly increased use of PECS when adults trained in the use of PECS were in the classroom. The study involved 6 half-days of PECS intervention per month for 5 months. While use of PECS by the children increased, there was no significant increase in verbal language use. The children's use of PECS diminished after classroom visits by the trained adults were stopped.

Recently, a comparison was made between PECS and another popular AAC technique, Responsive Education and Prelinguistic Milieu Training (RPMT). The results showed that children with autism trained in PECS were more verbal than those for whom the RPMT approach was used. Overall, the evidence supports the use of PECS as a tool for developing natural communication in children with autism, especially when it is taught before the child is six years old.

Is it harmful?
There are no known negative effects of PECS. Some parents have been concerned that their child will become dependent on PECS and not move on to develop natural speech. However, this view is not supported by research studies. In fact, there is evidence that children with autism who have learned to use PECS develop speech more quickly than those who have not been trained in PECS (see Does it work?).

The materials used in PECS are relatively inexpensive. A binder for storing PECS pictures can be made from a 3-ring binder. A Velcro strip is attached to the front cover to hold the picture(s) currently being used. Each picture can be drawn by a parent, cut out of a magazine, or made from an actual photograph of the object glued onto a card. A Velcro strip can be placed on the back of each picture to hold it in place on the front cover of the binder when it is being used. Each picture can be hole-punched for storage in the binder.

A more expensive alternative is to purchase a PECS binder and several commonly used pictures. However, even if you purchase these ready-to-use PECS systems, you will have to create your own pictures of preferred items that are unique to your child.

The more expensive side of PECS can be the expertise involved in PECS training. However, PECS can be covered in speech therapy under IDEA. Also, PECS training manuals are available for $40-70 for parents and other caregivers.

Autism is a condition covered under the Individuals with Disabilities Education Act (IDEA), and PECS Services covered by IDEA include early identification and assessment and speech language pathology (speech therapy). For nonverbal children, this can often include PECS. This law protects the rights of patients with autism and provides guidelines to assist in their education. It covers children from birth to age 21. Pediatricians can provide contact information for the state early intervention program for children 0 to 3 years old. School districts will coordinate special services for children 3-21 years old.

Many PECS resources, including commonly used pictures and PECS binders can be found at:

Several books that might be helpful in understanding the PECS approach are:

Pyramid Lesson Plans for Younger Children by Andy Bondy PhD, Kate Dickey, Diane Black and Sarah Buswell, 2002. Pyramid Education. -

A Pictures Worth by Andy Bondy, Ph.D., and Lori Frost, M.S., CCC/SLP, 2002. Woodbine House. -

PECS Training Manual, 2nd Edition by Lori Frost, M.S., CCC/SLP and Andy Bondy, Ph.D., 2002. -

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