JASPER Intervention in Down Syndrome

For in-person participation only, composite scores from the Mullen Scales of Early Learning (MSEL) will be used to measure cognition and language development. Composite scores are calculated averages based on MSEL subscales 1) Gross motor 2) Visual reception 3) Fine motor 4) Receptive language 5) Expressive language. Higher composite scores are associated with higher cognitive and language functioning.

Subscales of the Vineland Adaptive Behavior Scales, Second Edition (VABS-II) will be used to measure language, socialization, problem behaviors and adaptive skills. VABS-II subscales include 1) Communication 2) Daily living skills 3) Socialization, and 4) Motor skills. Behavior frequency is measured on a range of 0=Never to 1=Sometimes to 2=Usually.

The Aberrant Behavior Checklist-Community (ABC-C) will also be used to measure language, socialization, problem behavior, and adaptive skills for in-person participation. ABC-C subscales include 1) Irritability 2) Lethargy 3) Stereotypy 4) Hyperactivity, and 5) Inappropriate speech and are measured on a range of 0=not at all a problem to 3=the problem is severe in degree.

The MacArthur-Bates Communicative Development Inventories (MB-CDI) will replace the ABC-C for virtual participation. The MB-CDI is a parent report instrument that captures important information about children's developing abilities in early language, including 1) Vocabulary comprehension 2) Production 3) Gestures, and 4) Grammar.

Autism Diagnostic Observation Schedule, Second Edition (ADOS-2) will be used to measure social communication skills for in-person participation. ADOS-2 subscales include areas like 1) Language and communication and 2) Reciprocal social interaction. Items within each subscale are scored on unique ranges starting with 0=closest to mastery of behavior.

The Autism Diagnostic Interview - Revised (ADI-R) will replace the ADOS for virtual participation. The ADI-R is a comprehensive parent interview that focuses on three functional domains of behavior that are not typically present in individuals without autism spectrum disorder. The three domains are: Language/Communication, Reciprocal Social Interactions, and Restricted, Repetitive, and Stereotyped Behaviors and Interests.

The Early Social Communication Scales (ESCS) is an experimental measurement that measures change in social-communication skills. It will be used for in-person participation only. The ESCS uses tasks to measure the frequency of initiation of and response to 1) Joint attention 2) Behavioral requests, and 3) Social interaction.

The PICS will replace the ESCS for virtual participation. The PICS uses photographs to aid caregivers in understanding and identifying the specific behaviors of interest. Modeled after the ESCS, the PICS assesses various forms and functions of triadic attention in young children.

The Caregiver Child Interaction sessions (CCX) and Early Social Communication Scales (ESCS) or Pictorial Infant Communication Scale (PICS) will be used to measure changes in joint attention skills. ESCS, which will only be used for in-person participation, uses tasks to measure the frequency of the child's initiation and response (see above). The PICS will replace the ESCS for virtual participation. The PICS uses photographs to aid caregivers in understanding and identifying the specific behaviors of interest. Modeled after the ESCS, the PICS assesses various forms and functions of triadic attention in young children. The CCX, which will be used for in-person and virtual participation, measures the amount of time that parent and child engage during a play session.

Flexibility and diversity of play will be coded from the Structured Play Assessment (SPA) for in-person participation only. Different toys are presented to the child, and play interaction is measured in terms of 1) Functional play types 2) Symbolic play types, and 3) Play level.