RETRACTED: An examination of the relationship between autism spectrum disorder, intellectual functioning, and comorbid symptoms in children.

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).

Autism severity as a predictor of inattention and impulsivity in toddlers.

Objective: Evaluate how severity of autism spectrum disorder (ASD) symptoms predicts attention-deficit/hyperactivity disorder (ADHD) symptoms in atypically developing toddlers.

Method: Parents/caregivers of 2300 atypically developing toddlers' ages 18-37 months were assessed about their children's behaviours using the Baby and Infant Screen for Children with aUtIsm Traits (BISCUIT) Part 1 and the inattention/impulsivity subscale of the BISCUIT-Part 2.

Results: ASD symptom severity was positively and significantly correlated with inattention/impulsivity, indicating that children with more severe symptoms of ASD tended to have higher scores on the measure of inattention/impulsivity, R(2) = 0.

RETRACTED: A comparison of tantrum behavior profiles in children with ASD, ADHD and comorbid ASD and ADHD.

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).

An investigation of self-injurious behaviors in adults with severe intellectual disabilities.

Self-injurious behavior (SIB) is commonly observed among individuals with intellectual disability (ID) living in state-run supports and services centers. Specific examples of SIB include poking oneself in the eye; harming oneself by hitting, scratching, or pinching; and pica (i.e.

RETRACTED: Rates of comorbid symptoms in children with ASD, ADHD, and comorbid ASD and ADHD.

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).

Externalizing and tantrum behaviours in children with ASD and ADHD compared to children with ADHD.

Objective: Compare rates of externalizing in children with autism spectrum disorder (ASD) and attention deficit/hyperactivity disorder (ADHD) symptoms to children with ADHD.

Method: Parents/caregivers of 85 children with ASD and/or ADHD were surveyed about their children's behaviours using the Autism Spectrum Disorders-Comorbidity for Children and the Autism Spectrum Disorders-Behaviour Problem for Children.

Results: Specific main effects analyses were then conducted.