THURSDAY, March 1 (HealthDay News) -- Children with autism often display challenging behaviors, but new research suggests that parents can learn to better handle tantrums and aggression, which may improve their child's overall functioning.

"Parent training is one of the best, evidence-supported treatment interventions in child psychiatry for other conditions, such as for children with ADHD or children with oppositional defiant disorder," said senior study author Lawrence Scahill, a professor at Yale University School of Nursing and Child Study Center in New Haven, Conn. "But strangely enough, it had never really been tried with children with autism or with developmental disabilities, so we had to make our own manual."

The study involved 124 children aged 4 to 13 with an autism spectrum disorder and serious behavioral issues, including daily, prolonged tantrums, aggression or self-injurious behavior. The children were prescribed risperidone (Risperdal), an antipsychotic drug approved by the U.S. Food and Drug Administration for treating severe behavioral problems in children with autism.

Half the children and their parents were also assigned to a six-month, structured "parent training" program. Parents were asked to identify the most difficult, disruptive behaviors and to think about what preceded the incidents and why the child might do it. They then worked with counselors to devise strategies to avoid the triggers and help the child respond better to the everyday stressors.

Parents who underwent training reported a greater decrease in problem behaviors than the parents of children on medication alone, researchers found. By the end of the study, the average dose of risperidone was lower for kids in the parent-training group.

"On the tantrums, the aggression and the self-injury, the combination of medications and parent training was better," said Scahill. "How much better? Not a huge amount, but it was an incremental improvement over an already effective improvement."

Parents who received training also reported improvements on a test known as the Vineland Adaptive Behavior Scale, which measures how well a child does everyday activities, such as communicating, socializing, dressing, eating at the table and going to school.

By diminishing serious problem behaviors, such as tantrums and aggression, children's skills in other areas improved, but the difference was not statistically significant.

Autism is a neurodevelopmental disorder characterized by impaired social interaction, verbal and nonverbal communication, restricted interests and behaviors, repetitive behaviors and sometimes intellectual disability.

The study is published in the February issue of the Journal of the American Academy of Child & Adolescent Psychiatry.

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'Parent Training' May Help Kids With Autism Behave Better