Conclusions We found patchy evidence on reliability and validity , for only a few of the tools used to measure behaviour problems in young children with ASD .
Background Behaviour problems are common in young children with autism spectrum disorder ( ASD ) .
There are many different tools used to measure behavior problems but little is known about their validity for the population .
Objectives To evaluate the measurement properties of behaviour problems tools  used in evaluation of intervention or observational research studies with children with ASD up to the age of six years .
A Pilot Study of Parent Training in Young Children with Autism Spectrum Disorders and Disruptive Behavior
Guidance on effective interventions for disruptive behavior in young children with autism spectrum disorders ( ASDs ) is limited . We present feasibility and initial efficacy data on a structured parent training program for 16 children ( ages 3–6 ) with ASD and disruptive behavior . The 6-month intervention included 11 Core and up to 2 Optional sessions . The program was acceptable to parents as evidence d by an attendance rate of 84 % for Core sessions . Fourteen of 16 families completed the treatment . An independent clinician rated 14 of 16 subjects as much improved or very much improved at Week 24 . Using last observation carried forward , the parent-rated Aberrant Behavior Checklist-Irritability subscale decreased 54 % from 16.00 ( SD = 9.21 ) to 7.38 ( SD = 6.15 )
Conclusions We found patchy evidence on reliability and validity , for only a few of the tools used to measure behaviour problems in young children with ASD .
Background Behaviour problems are common in young children with autism spectrum disorder ( ASD ) .
There are many different tools used to measure behavior problems but little is known about their validity for the population .
Objectives To evaluate the measurement properties of behaviour problems tools  used in evaluation of intervention or observational research studies with children with ASD up to the age of six years .