Discrete Trial Training - New Findings
Monday, June 30th, 2008 · Tagged ABA, Applied Behavior Analysis, autism research, autism spectrum disorder, autism spectrum disorders, Computer Programs, Computer Software, computers and Evidence Based Practices · Permalink Comments
Over the Memorial Day weekend, Dr. Chris Whalen and Dr. Shannon Cernich attended the Applied Behavior Analysis International conference in Chicago. There were many exciting presentations and new developments in the field of ABA related to autism.
Of particular interest was a poster presentation entitled “An Analysis of Instructor Errors in Discrete-Trial Teaching of Children with Autism” by Daniel Mruzek, Tristram Smith, and colleagues at the University of Rochester. They found that the largest proportion of instructor errors when delivering discrete trial training (DTT) occurred when delivering reinforcement.
These errors were of two types: The instructor reinforced an incorrect child response or the instructor failed to reinforce a correct child response. For example, instructor says “Show me the big one.” Child points at small item but instructor thinks the child pointed at big item and says, Great job!” Or the child points at the big item but the instructor is looking at her data sheet and thinks the child did not respond and says, “Try again.” As reinforcement (often colloquially known as reward) is what increases the rate of a response, DTT can result in the wrong responses being increased, even with a trained instructor.
This is not to suggest that DTT is a flawed methodology. All training methods as well as life often result in the wrong responses being reinforced. Imagine the following scenario: You meet someone new named Shelly; you mishear her name and call her Sally. She responds when you call her Sally and does not correct you. Your behavior of calling her by the wrong name is reinforced.
So the point is not to end your child’s DTT program in place of some other methodology, but to make sure it is being properly supervised. Trained, good ABA therapists will regularly make the errors describe above (they’re only human), but a good supervisor will detect and correct these errors while supervising your child’s session.
More highlights from the ABA conference will follow in future blogs, but in conclusion, Dr. Chris and Dr. Shannon gave presentations at the conference on the use of TeachTown: Basics, a computer-assisted program that delivers concepts during the computer sessions in a DTT format. Although computerized instruction is meant to supplement human instruction, not replace it, we are proud to state that TeachTown: Basics delivers errorless reinforcement. There are some things that computers can do better than people. If only your computer would help you the next time your child tantrums!

y people exchange gifts during the winter holidays. This can be a source of great disappointment for family and friends of a child with ASD. As a behavior therapist, I once special ordered a beach magnet set for a child I worked with one-on-one, three hours a day, five days a week. I was sure he would love it. I imagined all the exciting language he would produce when we played with those magnets. I heard in my mind spontaneous comments he would make and squeals of delight he would emit. As you probably guessed, the boy opened the magnet set, said nothing, put it down, and picked up another toy. I tried to engage him with the magnets through my enthusiasm. Nothing worked. I have heard similar stories from parents and educators time and again. Even when the child showed intense interest in a toy when it belonged to someone else or requested the toy, the same toy is often of little interest to the child when received as a holiday gift. As a parent, there is nothing you can do to prevent this. If you have a neurotypical child, you may have complained that he or she only played with a new toy for a day and lost interest. This is part of being a parent, but it is especially disheartening when your child is on the Autism Spectrum, has limited interests, and you worked so hard to find that special gift. Remember that your effort is special regardless of the immediate reaction to the gift. And time may reward your effort. I heard that the beach magnet set became a preferred toy for the boy I worked with over a year later.
