Behavioral inflexibility (BI) has been highlighted to occur across genetic and neurodevelopmental disorders. This study characterized BI in two common neurogenetic conditions: Fragile X syndrome (FXS) and Down syndrome (DS). Caregivers of children with FXS (N = 56; with ASD = 28; FXS only = 28) and DS (N = 146) completed the Behavioral…

Social participation of children with an autism spectrum disorder (ASD) in natural environments can be enhanced by teaching them to communicate spontaneously, at least in situations where they have the motivation to access specific items or activities by controlling the amount of access for these stimuli. The purpose of this study was to determine…

We examined language profiles of 2571 children, 30-68 months old, with autism spectrum disorder (ASD), other developmental disabilities (DD), and typical development from the general population (POP). Children were categorized as expressive dominant (ED), receptive dominant (RD), or nondominant (ND). Within each group, the ED profile was the least…

Wilkinson and Green (1998) reported that differences in the procedure by which new words were introduced to learners with cognitive impairments significantly affected their accuracy in later tests of receptive understanding of word meanings. However, a limited sample and no control group rendered the data preliminary. Here, I replicated and…