Increasing speech intelligibility in children with autism.

Bacon et al. (1998) compared two ways to teach speech sounds to children with autism. One way was naturalistic: the therapist followed the child’s lead and used toys the child already wanted. The other way was analog: the child sat at a table and followed the adult’s plan.

The team used an alternating-treatments design. Each child got both kinds of sessions across many days. The goal was to see which method helped kids actually use the new sounds when they talked with others.

Both styles taught the kids to say the target sounds correctly. Only the naturalistic style got the kids to use those sounds later in real conversation. In other words, table-top drilling worked for echoing; play-based teaching worked for talking.

Sievert et al. (1988) set the stage. They showed that reinforcing any vocal attempt jump-starts speech in non-verbal children. The 1998 study keeps the child-focus but moves the goal from first words to clear conversation.

Ferguson et al. (2022) and Shire et al. (2018) extend the same idea. They train parents to use naturalistic teaching at home through telehealth or short play sessions. Kids gained mands, tacts, and spontaneous language, showing the approach keeps working when caregivers run it.

Chandler et al. (2002) and Schertz et al. (2018) push the age even lower. Their parent programs for toddlers target pre-speech skills like joint attention. Together these papers form a line: start with attempts, add motivation, then stretch the same naturalistic thread across sounds, words, and conversation.

If you want speech gains that travel beyond the clinic room, weave motivation into every trial. Let the child pick the toy, follow their eye shift, and reinforce the new sound right there. You can start this Monday: take five preferred items, wait for interest, and prompt the target sound during the moment of high motivation. No extra table needed.