JASPER Intervention in Down Syndrome

The goal of this study is to determine whether JASPER (Joint Attention, Symbolic Play,
Engagement, Regulation), which is an intensive, targeted early behavioral intervention
focused on a developmentally based approach for teaching joint engagement, joint attention,
and play skills can improve behavioral / emotional regulation, social communication skills,
and developmental trajectories in Down syndrome (DS). The investigators will also explore the
potential use of EEG and event-related potentials (ERP) as outcome measures, as this approach
may help elucidate mechanisms of change in behavior and development, and may help explain
differences in development of social communication skills in individuals with DS. EEG and ERP
measure may also help to predict treatment outcome.